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closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,314
["CHANGELOG.md", "src/compiler/compile/css/Selector.ts", "test/css/samples/global-with-unused-descendant/_config.js", "test/css/samples/global-with-unused-descendant/expected.css", "test/css/samples/global-with-unused-descendant/input.svelte"]
:global(...) .child selector is given svelte- suffix if there is a variable class name in the html
If there is an element with a `class={someVariable}` attribute in the markup, `:global(body) .className` child selectors get suffixed, and therefore don't apply to child components. For example, if you have a parent component that applies a "theme" class to its top-level element, and has child selectors to style matching elements within all its child components depending on the theme, it doesn't work if the theme class is a variable (but does if it's hard-coded as e.g. `<div class="purple">`. (The variable class is what's relevant - any element with a non-hard-coded class name in the parent component will break it.) REPL: - reproduction: https://svelte.dev/repl/0cf466aa625c42ed9dc845d0b46d1905?version=3.17.3 - fixed (by removing variable class name): https://svelte.dev/repl/2f88829ff20846a79e8c395f8ecef741?version=3.17.3
https://github.com/sveltejs/svelte/issues/4314
https://github.com/sveltejs/svelte/pull/4332
70d17950880e56f78c0a919b41ad2a356a9e37ff
be9b79f805a3f738986dd6a2fc9f39e07efe46bf
2020-01-24T13:49:04Z
javascript
2020-01-27T23:25:24Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,312
["CHANGELOG.md", "package-lock.json", "package.json"]
Unexpected token (Note that you need plugins to import files that are not JavaScript)
**Describe the bug** When in script section there is **Inline comment** and right after it **Block comment** we can expect error. **To Reproduce** Write inline comment then press enter to write code from new line and write block comment https://svelte.dev/repl/1ad2f11fa4a549bdb67703b5f16a0f4f?version=3.17.3
https://github.com/sveltejs/svelte/issues/4312
https://github.com/sveltejs/svelte/pull/4327
efe8ab9ca569b8cc706cb4c231b39c160ba479e3
3eb298fd28ff68f782f632a9029b430745cb0c2b
2020-01-23T16:23:11Z
javascript
2020-01-27T19:02:30Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,310
["CHANGELOG.md", "src/compiler/compile/render_ssr/handlers/Title.ts", "test/hydration/samples/head-meta-hydrate-duplicate/_before_head.html", "test/server-side-rendering/samples/head-meta-hydrate-duplicate/_expected-head.html"]
Hydration removes <title> element
**Describe the bug** When starting from SSR generated HTML with `hydratable: true`, hydration will remove the `<title>` element along with the other appropriate `<head>` elements, but will not add it back. **Logs** None. **To Reproduce** https://github.com/johnmuhl/svelte-hydrate-head **Expected behavior** The `<title>` should remain after hydration. **Stacktraces** None. **Information about your Svelte project:** Independent of browser. Svelte 3.17.0+ **Severity** Pretty bad. **Additional context** This was introduced in #4082. The compiled component sets `document.title` first and then later removes elements matching `[data-svelte="svelte-..."]`, and so the title is lost. The simplest way to handle this would probably be to not add the special SSR attribute to the `<title>` element at all, since as of #4250 we don't need to worry about there being more than one of that anyway. cc @johnmuhl @tanhauhau
https://github.com/sveltejs/svelte/issues/4310
https://github.com/sveltejs/svelte/pull/4311
e959dbcf31fb418b282404daa20c942b2c4264c1
455a5cc754cbdf605630aceb8dab6bb1281d8a95
2020-01-23T14:29:08Z
javascript
2020-01-23T15:06:42Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,308
["src/runtime/internal/Component.ts", "src/runtime/internal/dom.ts", "test/hydration/samples/head-meta-hydrate-duplicate/_after_head.html"]
Better hydration
**Is your feature request related to a problem? Please describe.** Currently hydration is very expensive, it searches for the correct node type clears it and re-adds the attributes and finally unmounts and remounts the DOM node by calling insertBefore/append This causes iframes to reload. In the current implementation setting the innerHTML to '' and doing client side render is faster and cleaner **Describe the solution you'd like** All DOM should be reused, attributes should not be cleared, and no node should be insertBefore/append unless there is an actual reason. DOM nodes shouldn't be scanned for the correct nodeName - assume everything is in order on the first miss clear all the rest and start adding new nodes as needed Text nodes need special treatment as they collapse in SSR **Describe alternatives you've considered** A clear and concise description of any alternative solutions or features you've considered. **How important is this feature to you?** It is a deal breaker for us - we have quite a few iframes in use and using hydration in it's current form reloads them, it also slows our TTI. So we are stuck with either using only client-side rendering or picking a different solution **Additional context** -
https://github.com/sveltejs/svelte/issues/4308
https://github.com/sveltejs/svelte/pull/6395
96b56695729071d081b8ee11be245d1e15f6fa22
04bc37de31457dfb331cdea74e2b341c43c6b7c2
2020-01-23T10:46:13Z
javascript
2021-06-22T14:34:48Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,301
["CHANGELOG.md", "src/compiler/compile/render_dom/wrappers/EachBlock.ts", "src/runtime/internal/keyed_each.ts", "test/runtime/samples/keyed-each-dev-unique/_config.js", "test/runtime/samples/keyed-each-dev-unique/main.svelte"]
Throw dev mode exception when a keyed each has duplicate keys
**Is your feature request related to a problem? Please describe.** Duplicate keys in a keyed each can cause confusing runtime errors. **Describe the solution you'd like** A dev-mode-only check for **Describe alternatives you've considered** Making keyed eaches behave better when there are duplicate keys sounds like a lot of work and probably not a good idea anyway. The only alternative I've really considered (besides doing nothing) is to run this check all the time with keyed eaches, not just in dev mode. But this would be a) more code for people whose apps are already working fine, and b) more work for the browser to do. I think this makes the most sense as a dev mode error (or _possibly_ a dev mode warning). **How important is this feature to you?** It'd be nice. It shouldn't be too hard (I have it basically working locally), and it doesn't introduce any extra cost to people in prod mode. **Additional context** See #4244.
https://github.com/sveltejs/svelte/issues/4301
https://github.com/sveltejs/svelte/pull/4303
5107ad38b6ce0e388cb2eb99361c5000c4b6de91
1a343b165c577429e968cea48607cccabf714b9b
2020-01-21T22:16:42Z
javascript
2020-01-22T16:05:31Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,298
["CHANGELOG.md", "src/runtime/internal/utils.ts", "src/runtime/store/index.ts", "test/store/index.js"]
svelte/store `derived` doesn't handle RxJS observables
**Describe the bug** The `derived` implementation doesn't handle RxJS Observables like other autosubscription stuff does. **Logs** ``` TypeError: "fn is not a function" ``` **To Reproduce** ```svelte <script> import { of } from 'rxjs'; import { derived } from 'svelte/store'; const store1 = of('foo'); const store2 = derived(store1, _ => _); store2.subscribe()(); </script> ``` **Expected behavior** Subscribing to and unsubscribing from a store derived from an observable should work. In particular, this means the 'look to see whether there's an `unsubscribe` method to call instead' logic we use elsewhere should also be use in the `derived` implementation. **Information about your Svelte project:** - Svelte 3.17.2 - REPL **Severity** Probably worth the bytes it would take to fix. **Additional context** A question came up in chat about using Observables in Svelte. I don't know whether the gap this issue describes is part of what was wrong, but the question did lead me to look into this. We're already shipping a few extra bytes to everyone for RxJS support whether they're using it or not. It would be nice to be able to use the same helper in `derived` as we're already using in every Svelte project that uses autosubscription, but that might not be possible because of the two-argument `subscribe()` calls for diamond dependency stuff.
https://github.com/sveltejs/svelte/issues/4298
https://github.com/sveltejs/svelte/pull/4300
e4daaccd06cfe8fe1f4885fcb10942132153b521
5107ad38b6ce0e388cb2eb99361c5000c4b6de91
2020-01-21T16:46:48Z
javascript
2020-01-22T14:19:32Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,292
["CHANGELOG.md", "src/compiler/compile/render_dom/Block.ts", "test/runtime/samples/component-slot-nested-if/Display.svelte", "test/runtime/samples/component-slot-nested-if/Input.svelte", "test/runtime/samples/component-slot-nested-if/_config.js", "test/runtime/samples/component-slot-nested-if/main.svelte"]
Potential bug with slot props/if block
Nested slot props inside of an #if block are only updating the first time the block is executed. I have a simple input component that passes the input via a slot prop to another slot. The prop is only updating the first time through when inside of an #if block. If I dereference the prop outside of the inner slot it seems to work. Here is a repl demonstrating the behavior: https://svelte.dev/repl/50850852403548b5b6381145ba9dc796?version=3.17.1 Using latest svlete, Chrome on latest osx Not sure if this is a bug or expected behavior, but it took a lot of effort to track down.
https://github.com/sveltejs/svelte/issues/4292
https://github.com/sveltejs/svelte/pull/4294
e93c9913623ba43d8424191fe33f8bebb36e7dea
e4daaccd06cfe8fe1f4885fcb10942132153b521
2020-01-20T22:34:37Z
javascript
2020-01-22T11:32:24Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,284
[".gitattributes"]
Change detected language to TypeScript
**Is your feature request related to a problem? Please describe.** Svelte is detected as a JavaScript project by github linguist. I sugest to change it to TypeScript. **Describe the solution you'd like** There are several solutions: https://github.com/github/linguist#overrides <img width="987" alt="image" src="https://user-images.githubusercontent.com/1494154/72664403-bd14fd80-39fd-11ea-83af-cf591545b535.png">
https://github.com/sveltejs/svelte/issues/4284
https://github.com/sveltejs/svelte/pull/5878
32775a699dd9cbc9884ee04931c3903b832775d5
dbd184c38c0f517107316835db948619ff4cf8c0
2020-01-18T13:25:03Z
javascript
2021-01-18T19:46:51Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,278
["CHANGELOG.md", "src/compiler/compile/render_dom/wrappers/Body.ts", "src/compiler/compile/render_dom/wrappers/Element/EventHandler.ts", "src/compiler/compile/render_dom/wrappers/shared/add_event_handlers.ts", "test/runtime/samples/event-handler-modifier-body-once/_config.js", "test/runtime/samples/event-handler-modifier-body-once/main.svelte"]
capture, passive modes not working for svelte:body special element.
**Describe the bug** once, capture, passive options are not working for the svelte:body element. **Observation** `<svelte:window on:keydown|passive={handleKeydown}>` generates `listen(window, "keydown", /*handleKeydown*/ ctx[2], { passive: true }),` *while* `<svelte:body on:keydown|passive={handleKeydown}/>` generates `document.body.addEventListener("keydown", /*handleKeydown*/ ctx[2]);` instead of using the listen method.
https://github.com/sveltejs/svelte/issues/4278
https://github.com/sveltejs/svelte/pull/4279
bda254e250e737a1dd7acf6c732d656ce52034a1
b39282a9188027903fdb99cdf762b640f11c6cc1
2020-01-17T11:21:14Z
javascript
2020-01-17T12:22:40Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,267
["CHANGELOG.md", "package-lock.json", "package.json", "test/js/samples/debug-empty/expected.js", "test/js/samples/debug-foo-bar-baz-things/expected.js", "test/js/samples/debug-foo/expected.js", "test/js/samples/dev-warning-missing-data-computed/expected.js"]
Await Parenthesis
**Describe the bug** If a component contains a javascript statement "await (expression)", then svelte removes the parenthesis in the generated javascript. However, the execution order is not the same (at least in chrome) : "await a || b" is executed as "(await a) || b" The bug is probably a regression between 3.12 and 3.17.1 **To Reproduce** https://svelte.dev/repl/79a4dad98f3f41d7ae9840d3eb8209ea?version=3.17.1 ``` async function myTest() { let a, b; let c = await (a || b); } ``` has been outputed as ``` async function myTest() { let a, b; let c = await a || b; } ``` **Expected behavior** The parenthesis should not be removed in the generated javascript. **Information about your Svelte project:** - Chrome 77 - Svelte 3.17.1 - Windows 7 - Webpack **Severity** This is a minor issue because a workaround is easy to write, however the generated javascript is not correct and it's a regression with a previous version of svelte. it was not easy to find the cause of this new bugs in my application.
https://github.com/sveltejs/svelte/issues/4267
https://github.com/sveltejs/svelte/pull/4283
b39282a9188027903fdb99cdf762b640f11c6cc1
2f81365e44f585c28295cb3937910eef00a35b0e
2020-01-15T15:06:28Z
javascript
2020-01-18T12:10:13Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,263
["src/compiler/compile/render_dom/wrappers/IfBlock.ts"]
Wrong {#if} {:else} with context_overflow (this.context.length > 31)
**Describe the bug** `if` directive doesn't work as expected if context_overflow (this.context.length > 31) **To Reproduce** https://svelte.dev/repl/09bca24d4cc940e38b00afe53ad3da51?version=3.17.0 **Expected behavior** You should see `true` two times **Information about your Svelte project:** - Your browser and the version: (e.x. Chrome 52.1, Firefox 48.0, IE 10) FF, Chrome - Your operating system: (e.x. OS X 10, Ubuntu Linux 19.10, Windows XP, etc) Mac - Svelte version (Please check you can reproduce the issue with the latest release!) 3.17.0 - Whether your project uses Webpack or Rollup both reproduce bug **Severity** blocking an upgrade to Svelte with bitmasks **Additional context** Problem in this check dirty[0] it is falsy ``` function select_block_type(ctx, dirty) { if (dirty[0] & /*a0*/ 1) show_if = !!(/*arr*/ ctx[1].indexOf(/*a1*/ ctx[2]) && /*a0*/ ctx[0] <= 1); } ``` May be dirty should be mutidimensional array? Because it is not
https://github.com/sveltejs/svelte/issues/4263
https://github.com/sveltejs/svelte/pull/4508
a8291227ce6ebf959749ae5d6f86b017a140d4af
345d5f27ee2ed5fdd3f0bf2bea84c9f0f57b038e
2020-01-14T14:15:31Z
javascript
2020-03-05T02:30:52Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,261
[".github/workflows/ci.yml", "src/compiler/compile/utils/__test__.ts"]
[Internals] Broken unit test when running test:unit
**Describe the bug** Running the unit tests locally will fail when run (`npm run test:unit`). Specifically [this test](https://github.com/sveltejs/svelte/blob/master/src/compiler/compile/utils/__test__.ts#L13-L15) will fail. **Logs** ```log > [email protected] test:unit /Users/fossaloaner1/GitHub/svelte > mocha --require sucrase/register --recursive src/**/__test__.ts get_name_from_filename ✓ uses the basename ✓ uses the directory name, if basename is index 1) handles unusual filenames 2 passing (5ms) 1 failing 1) get_name_from_filename handles unusual filenames: AssertionError [ERR_ASSERTION]: 'U5B_partsu5D' == 'Parts' + expected - actual -U5B_partsu5D +Parts at Context.<anonymous> (src/compiler/compile/utils/__test__.ts:14:10) at processImmediate (internal/timers.js:439:21) ``` **To Reproduce** Do this: ``` git clone [email protected]:sveltejs/svelte.git cd svelte/ npm install npm run test:unit ``` **Expected behavior** The test should pass, or be removed. We should also investigate when this broke. **Information about your Svelte project:** Cloned this project, at commit 3d9655a2a186d18c366149d218cf67c75b722433. **Severity** These tests don't seem to get run anywhere (aside from locally as developers), so I'd rate this as pretty low priority. I already have a fix on the way 👍 **Additional context** Noticed this while I was working on #3311 and I just wanted to document this here so I have something to attach a PR to. I was also curious why these unit tests aren't run anywhere. 🤔
https://github.com/sveltejs/svelte/issues/4261
https://github.com/sveltejs/svelte/pull/4262
9cdf0da160d906948a4b4bbaebaf856751906177
bf006a43e5fd2339adb6cfca1a322fdedcbf48da
2020-01-14T04:28:28Z
javascript
2020-01-24T01:51:29Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,259
["src/runtime/internal/scheduler.ts", "test/runtime/samples/onmount-get-current-component/_config.js", "test/runtime/samples/onmount-get-current-component/main.svelte"]
Current component should (probably?) not be available inside onMount
**Describe the bug** Things that internally use `get_current_component()` should probably fail when they are called from an `onMount` callback. **Logs** None. **To Reproduce** ```svelte <script> import { getContext, onMount } from 'svelte'; import { get_current_component } from 'svelte/internal'; onMount(() => { console.log(get_current_component()); }); </script> ``` **Expected behavior** I'd expect this to crash, but it doesn't. There _is_ an exception if you use `setTimeout` instead of `onMount`. **Stacktraces** n/a **Information about your Svelte project:** - Svelte 3.17.0 **Severity** I'm not sure. I'm not actually positive this _is_ a bug, but it feels like it. I don't think we want people to be able to call other lifecycle hooks or access the context within `onMount`. **Additional context** Came up in chat by way of a question about calling `setContext` in a component and then calling `getContext` during that component's `onMount` callback. It feels like this shouldn't actually be allowed.
https://github.com/sveltejs/svelte/issues/4259
https://github.com/sveltejs/svelte/pull/4909
ae971f80ae11659c8885748a5aeaac82eb5ec17b
211fc92e69b7eb02b2e7f0d67e6569c8fcbfcb52
2020-01-14T02:36:47Z
javascript
2020-09-10T19:39:45Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,256
["site/content/docs/03-run-time.md", "site/content/tutorial/09-motion/02-spring/text.md"]
Specify/explain access to store better
During the reading tutorial, I got confused with store access (usage of $) - confusion was due to this chapter https://svelte.dev/tutorial/spring On line 30 there is usage of **$** `<circle cx={$coords.x} cy={$coords.y} r={$size}/>` Problem is that all over the coords are accessed without **$** (like line 15) `<h3>stiffness ({coords.stiffness})</h3>` After discussion on discord it was explained that stiffness" and "damping" are actual attributes on the store "spring" I'd like to see some link to a clean explanation or note about this difference in meaning. I'd say it may slow down adoption and rise learning curve due to unclear meaning for newbies.
https://github.com/sveltejs/svelte/issues/4256
https://github.com/sveltejs/svelte/pull/7463
9e8592ef2cd8e3feaadeff58c10a237234a43e26
d554cdbb25678cdb7ea247469d2e009323dd037b
2020-01-12T18:32:19Z
javascript
2022-04-20T01:29:34Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,242
["CHANGELOG.md", "src/compiler/compile/css/Selector.ts", "test/css/samples/attribute-selector-word-arbitrary-whitespace/expected.css", "test/css/samples/attribute-selector-word-arbitrary-whitespace/input.svelte"]
Multiline class attribute value breaks svelte
**Describe the bug** At my team we spread classes into multiple lines when there are more than two classes to make it more readable. This breaks svelte. ```html <div class=" foo " > </div> <style> .foo { background: red; } </style> ``` **Logs** ``` ERROR in ./src/_components/Foo.svelte Module Error (from ./node_modules/eslint-loader/dist/cjs.js): [...]/_components/Foo.svelte 9:3 warning Unused CSS selector css-unused-selector ``` **To Reproduce** To reproduce just spread the classes named in the value of the class attribute into multiple lines, like in this REPL https://svelte.dev/repl/b85c17a37a0547f58f1bd221ae4bd8bc?version=3.16.7 ```html <div class=" foo " > </div> <style> .foo { background: red; } </style> ``` **Expected behavior** Components are working as classes weren't written in multiple lines.
https://github.com/sveltejs/svelte/issues/4242
https://github.com/sveltejs/svelte/pull/4286
2f81365e44f585c28295cb3937910eef00a35b0e
e4460e38ba58d5209514f0fa93dc61b6bb1ebb54
2020-01-10T08:03:10Z
javascript
2020-01-19T18:36:22Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,240
["src/runtime/internal/ssr.ts", "test/server-side-rendering/samples/spread-attributes-white-space/_expected.html", "test/server-side-rendering/samples/spread-attributes-white-space/main.svelte"]
White space escape characters are written into HTML when spread is used with SSR
**Describe the bug** When new lines and tabs are used in attributes, then run through SSR, they end up written into the HTML, eg. `<div class="\none\ntwo\n"></div>`. This breaks the class name and can cause a FOUC with Sapper, and would completely break rendering of HTML-only static-generated pages. **Logs** N/A **To Reproduce** REPL: https://svelte.dev/repl/80b8863b778c4b608537a98fb811de43?version=3.16.7 If you download the REPL, change to `generate:'ssr'` and then `console.log(App.render())`, you get ```html <div class=" white space ">A</div> <div class="\n\twhite\n\tspace\n">B</div> <div class="white\nspace">C</div> ``` **Expected behavior** I would expect the white space to be rendered into the HTML as white space characters, like the first `<div>` above. **Stacktraces** N/A **Information about your Svelte project:** - Your browser and the version: (e.x. Chrome 52.1, Firefox 48.0, IE 10) N/A - Your operating system: (e.x. OS X 10, Ubuntu Linux 19.10, Windows XP, etc) Arch Linux - Svelte version (Please check you can reproduce the issue with the latest release!) 3.16.7 - Whether your project uses Webpack or Rollup Rollup **Severity** HTML-only web pages would be severely broken by this bug, and it may not be obvious during development. Sapper sites will have a FOUC. **Additional context** I came across this bug by running into a bug causing a FOUC when I was using Svelte Material UI: [https://github.com/hperrin/svelte-material-ui/issues/66](https://github.com/hperrin/svelte-material-ui/issues/66)
https://github.com/sveltejs/svelte/issues/4240
https://github.com/sveltejs/svelte/pull/4247
ef56a70acbe484bf1be9787ae63ae5102ee275ea
e3d66869df5b75b81da6183c5d68cde53b2439aa
2020-01-10T02:14:41Z
javascript
2020-01-13T16:24:34Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,233
["src/runtime/internal/dom.ts", "test/runtime-puppeteer/samples/binding-width-height-initialize/_config.js", "test/runtime-puppeteer/samples/binding-width-height-initialize/main.svelte"]
bind:offsetHeight doesn't update in certain cases
**Describe the bug** In Chrome, using `bind:offsetHeight` on a component that immediately changes size does not trigger a change in the `offsetHeight` variable: https://codesandbox.io/s/upbeat-hill-ilkqt?fontsize=14&hidenavigation=1&module=%2FApp.svelte&theme=dark This does not seem to happen in Firefox or Safari, but it does happen in Chrome. **To Reproduce** https://codesandbox.io/s/upbeat-hill-ilkqt?fontsize=14&hidenavigation=1&module=%2FApp.svelte&theme=dark **Expected behavior** `offsetHeight` should be something close to `800` (in the example above) **Notes** Is there a reason Svelte doesn't attempt to use a ResizeObserver for resize detection?
https://github.com/sveltejs/svelte/issues/4233
https://github.com/sveltejs/svelte/pull/8096
709264a94cbd29093349ac86e3edd0acc6af46b0
e5b0b6235dbc3483a1d1feb3fe8abf12f13bebd8
2020-01-09T00:48:39Z
javascript
2023-02-23T11:03:12Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,212
["CHANGELOG.md", "src/compiler/compile/Component.ts", "test/runtime/samples/reactive-values-no-implicit-member-expression/_config.js", "test/runtime/samples/reactive-values-no-implicit-member-expression/main.svelte"]
Assigning to a member expression in a reactive statement shouldn't auto-declare the variable
**Describe the bug** A reactive assignment that looks like `$: document.title = whatever;` doesn't work, because the compiler (unhelpfully, in this case) auto-declares `document` for us, and - since that is now undefined - the assignment `document.title = whatever;` is a runtime error. **Logs** `TypeError: document is undefined` **To Reproduce** ```svelte <script> $: document.title = 'foo'; </script> ``` **Expected behavior** This should simply assign to the global `document` and not attempt to automatically declare it **Stacktraces** - **Information about your Svelte project:** Svelte 3.16.7 - independent of browser or bundler. **Severity** Moderate, probably. We do specifically mention this syntax in the docs, and it doesn't work. **Additional context** I believe this will simply be a matter of adjusting the logic [here](https://github.com/sveltejs/svelte/blob/5486d67adf2d48820e94a1812028dba9392975b7/src/compiler/compile/Component.ts#L600 ) for when we bail out and decide we don't need to auto-declare the variable.
https://github.com/sveltejs/svelte/issues/4212
https://github.com/sveltejs/svelte/pull/4213
fe750d2606aa6203d394322f5d86c9da552be50e
741444d07e1e9bb51a1ca0b80daf6177876a9a6e
2020-01-05T03:25:17Z
javascript
2020-01-06T12:37:04Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,173
["CHANGELOG.md", "src/compiler/compile/nodes/Element.ts", "test/runtime/samples/component-slot-let-g/A.svelte", "test/runtime/samples/component-slot-let-g/_config.js", "test/runtime/samples/component-slot-let-g/main.svelte"]
Slot `let` variables not accessible on slotted element root
In the following abbreviated components I'd expect to have access to `foo` in the h1 class attribute. But instead it's only accessible _inside_ the slotted element content. #### Parent ```html <Child {baz}> Content <h1 slot=foobar let:foo class='foobar-{foo.type}'>{foo.title}!</h1> <!-- Unexpected behaviour is here - - ^ ^- - - This works fine --> </Child> ``` #### Child ```html <section class=child> <slot name=foobar foo={makeFoo(baz)} /> {@html baz.content} </Child> ``` I'd like the above example to work, with slot `let` variables in scope at the root slotted element Alternatives to this include: * Wrapping in a dummy element. (Yuck) * `bind:this` and manually setting the attributes I want later. (Ulcer inducing) This is pretty important for slotting tables: if you can't use data from the dataset to add attributes to slotted rows or cells you're missing something pretty darn important...
https://github.com/sveltejs/svelte/issues/4173
https://github.com/sveltejs/svelte/pull/4266
bfff7a9d0e67804e7a0db04ed4fb4b9a6078d0ec
8b9b2c266e55c7a3e589a32cecf8f208e430c10a
2019-12-27T03:19:07Z
javascript
2020-01-16T14:25:12Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,172
["site/content/docs/02-template-syntax.md"]
API - Template Syntax - <slot> - first example unclear - Widget references itself
# Steps Navigate to docs <slot> link: https://svelte.dev/docs#slot ## Expected Remove self reference of `<Widget />`. Also, the fallback text could use some wordsmithing. Perhaps "no child content" or something to that effect? ``` <!-- Widget.svelte --> <div> <slot> this will be rendered if someone does </slot> </div> ``` ## Actual I don't believe widget should be referencing itself. ``` <!-- Widget.svelte --> <div> <slot> this will be rendered if someone does <Widget/> </slot> </div> ``` REPL: [https://svelte.dev/repl/417113c7766d4dfd88ed4293b4693fd1?version=3.16.7](https://svelte.dev/repl/417113c7766d4dfd88ed4293b4693fd1?version=3.16.7) Note: My apologies for no PR as I'm very busy at the moment.
https://github.com/sveltejs/svelte/issues/4172
https://github.com/sveltejs/svelte/pull/4203
7ff0c8319126e6a0f8ea0dab5608454d57fb3034
fe750d2606aa6203d394322f5d86c9da552be50e
2019-12-26T22:12:06Z
javascript
2020-01-05T21:08:46Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,170
["CHANGELOG.md", "src/runtime/internal/Component.ts", "test/runtime/samples/reactive-values-store-destructured-undefined/_config.js", "test/runtime/samples/reactive-values-store-destructured-undefined/main.svelte"]
Destructuring a store object retuns the whole store if the property does not exist
**Describe the bug** When destructuring a store, the whole store object is returned if the property does not exist: `$: ({shouldBeUndefined} = $store);` It works if used with an existing property, i.e.: `$: ({existingProperty, shouldBeUndefined} = $store);` **To Reproduce** You can find the REPL [here](https://svelte.dev/repl/52333798bbea4d1b8bb5e249be1cca18?version=3.16.7) **Information about your Svelte project:** - Your browser and the version: Firefox 71 - Your operating system: Windows 10 - Svelte version : 3.16.7 - Whether your project uses Webpack or Rollup : Rollup **Severity** Annoying Thanks!
https://github.com/sveltejs/svelte/issues/4170
https://github.com/sveltejs/svelte/pull/4217
741444d07e1e9bb51a1ca0b80daf6177876a9a6e
3b0c6a1c5601b9f2e4339845b317044aa0a586d9
2019-12-26T08:33:59Z
javascript
2020-01-06T17:52:21Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,137
["site/content/docs/03-run-time.md"]
Wrong link is set as tweend contents
**Describe the bug** There is link connected with `tweend` in the contents of [spring](https://svelte.dev/docs#spring), but it doesn't work. It's because of wrong link. **To Reproduce** Click the link in [spring](https://svelte.dev/docs#spring). You will move to top page. **Expected behavior** Move to [tweend](https://svelte.dev/docs#tweened).
https://github.com/sveltejs/svelte/issues/4137
https://github.com/sveltejs/svelte/pull/4138
109639c57c51c9b73d5e618bbaf1b1c1b7698e17
11002c93fed22357d7e5bf95f37cc86931e467ba
2019-12-21T06:21:18Z
javascript
2019-12-21T10:01:35Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,129
["src/compiler/compile/render_dom/wrappers/InlineComponent/index.ts", "test/runtime/samples/dynamic-component-dirty/_config.js", "test/runtime/samples/dynamic-component-dirty/main.svelte"]
Infinite loop when props is updated inside a invalidation trigger in svelte:component
**Describe the bug** Infinite loop when props is updated inside a invalidation trigger in svelte:component **Logs** N/A **To Reproduce** https://svelte.dev/repl/97c2b939e3a34786b06f180092be6746?version=3.16.5 **Expected behavior** Would like params to be passed to the returned svelte component (from find_component). **Information about your Svelte project:** * All browsers. * Svelte v3.16.5 **Severity** Im using the svelte:component to be efficient in my coding, but could probably find a workaround.
https://github.com/sveltejs/svelte/issues/4129
https://github.com/sveltejs/svelte/pull/4192
311193f1d7dd7f04904567660b997f38c7b32e5b
fbaf3cfc1249645e7f0cc49fa3caab0a4ed6433e
2019-12-18T14:27:56Z
javascript
2023-03-01T16:28:37Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,098
["src/runtime/internal/scheduler.ts", "test/runtime/samples/store-invalidation-while-update-1/_config.js", "test/runtime/samples/store-invalidation-while-update-1/main.svelte", "test/runtime/samples/store-invalidation-while-update-2/_config.js", "test/runtime/samples/store-invalidation-while-update-2/main.svelte"]
Actions and invalidation during update
Every Block's update function was written with the assumption that nothing in it would invalidate any part of the component's context, but this might not be the case when actions are used. #4095 wasn't the correct solution to #4094. It was heavy-handed in that it removed all of the optimizations we could have when the entire dirty bitmask fits in one number. And it didn't actually fix the bug when the element that needs to be updated was located before the element that had the action attached to it. Consider the examples (courtesy of @dkondrad and @tanhauhau) https://svelte.dev/repl/1fb88e85446143578289742e81fae65b?version=3.16.4 and https://svelte.dev/repl/5239a903de1b401f92113318dcb344cc?version=3.16.4 - The first one broke in 3.16.0 and then was fixed in 3.16.4 because mutations to the bitmask array are now affecting the rest of the update. The second one is still broken in 3.16.4 (and I think has always been broken) because the data is invalidated after we've already seen whether we should update it. The obvious way to handle this is to make sure we schedule a new update if anything got invalidated during the update. One way to do that would be to make all calls to actions happen asynchronously, so that their updates happen afterwards. There might be a more elegant way to handle this. I think we can also reinstate the destructing fairly easily and generate even better code than we were pre-3.16.4 in cases where there is overflow. The argument to the update function could always be an array destructuring. code-red should make it fairly easy to generate a bunch of local variables for these called `#dirty0`, `#dirty1`, etc., and we could just refer to those instead of subscripting the array. This should also let us (continue to) avoid having two cases depending on whether there's an overflow.
https://github.com/sveltejs/svelte/issues/4098
https://github.com/sveltejs/svelte/pull/4101
1ef7601d69677bcec8aa1711bb55f152bb38615d
0bb40196db72c7166fa2a6e6715808d3bb2a83e3
2019-12-11T23:37:01Z
javascript
2019-12-18T01:04:39Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,086
["CHANGELOG.md", "src/compiler/compile/render_dom/Renderer.ts", "test/runtime/samples/module-context-bind/_config.js", "test/runtime/samples/module-context-bind/main.svelte"]
Module-level binding in svelte 3.16
Hi, after I updated svelte to the version `3.16.0`, the build command doesn't work anymore. Modules versions: * `"svelte": "3.16.0"` * `"rollup-plugin-svelte": "5.1.1",` Output: ```bash ⟩ yarn run build yarn run v1.19.1 $ rollup -c src/main.js → public/bundle.js... [!] (plugin svelte) TypeError: Cannot read property 'index' of undefined src/components/Header.svelte TypeError: Cannot read property 'index' of undefined at Renderer.invalidate (/Users/jeremiecorpinot/GitHub/memorare/front-app/node_modules/svelte/src/compiler/compile/render_dom/Renderer.ts:169:35) at bind_this (/Users/jeremiecorpinot/GitHub/memorare/front-app/node_modules/svelte/src/compiler/compile/render_dom/wrappers/shared/bind_this.ts:32:22) at ElementWrapper.add_bindings (/Users/jeremiecorpinot/GitHub/memorare/front-app/node_modules/svelte/src/compiler/compile/render_dom/wrappers/Element/index.ts:592:29) at ElementWrapper.render (/Users/jeremiecorpinot/GitHub/memorare/front-app/node_modules/svelte/src/compiler/compile/render_dom/wrappers/Element/index.ts:380:8) at FragmentWrapper.render (/Users/jeremiecorpinot/GitHub/memorare/front-app/node_modules/svelte/src/compiler/compile/render_dom/wrappers/Fragment.ts:151:18) at new Renderer (/Users/jeremiecorpinot/GitHub/memorare/front-app/node_modules/svelte/src/compiler/compile/render_dom/Renderer.ts:95:17) at dom (/Users/jeremiecorpinot/GitHub/memorare/front-app/node_modules/svelte/src/compiler/compile/render_dom/index.ts:17:19) at render_dom (/Users/jeremiecorpinot/GitHub/memorare/front-app/node_modules/svelte/src/compiler/compile/index.ts:97:6) at /Users/jeremiecorpinot/GitHub/memorare/front-app/node_modules/rollup-plugin-svelte/index.js:252:22 error Command failed with exit code 1. info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command. ``` What's in the file: `Header.svelte` ```JavaScript <script context="module"> let domHeader // ...other variables export function hideHeader() { // ...function's body } </script> <script> // ...some JavaScript code </script> <style> /*...some styles */ </style> <header> <!-- some dom --> </header> ``` To see the full code you can go to my repo [Header.svelte](https://github.com/memorare/memorare.app/blob/master/src/components/Header.svelte) The same code works with the svelte version `3.15.0` The bug appears when I require the exported functions in the `script module` with svelte `3.16.0`. Example: ```JavaScript // Some other module import { hideHeader } from 'Header.svelte'; ```
https://github.com/sveltejs/svelte/issues/4086
https://github.com/sveltejs/svelte/pull/4352
83d461f53731d566c049a1b071c2b51ee57524b5
3cbe38cbf1d69e103a490cdb456aa74ab2cfda40
2019-12-10T18:35:20Z
javascript
2020-02-03T17:12:01Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,077
["src/compiler/compile/render_dom/Renderer.ts", "test/runtime/samples/bitmask-overflow-3/_config.js", "test/runtime/samples/bitmask-overflow-3/main.svelte"]
Application won't compile - "cannot read property 'n' of undefined" since 3.16.1
**Describe the bug** Upgrading an existing app to Svelte 3.16.1 causes client compilation to fail with the error `Cannot read property 'n' of undefined`. I'm the second person to see this in the discord, it seems. I don't know where the error comes from or what the causes is (but I do see that the variable `n` is used a lot in recent Svelte commits - https://github.com/sveltejs/svelte/commit/bb5cf9ada7706fed9bb86467d2ae78c76f88b9d0). **Logs** ant@xeno  ~/Projects/beyonk-dashboard   master ●  npm run dev > [email protected] dev /home/ant/Projects/beyonk-dashboard > PORT=1233 NODE_CONFIG_ENV=${NODE_ENV} sapper dev ✗ client Cannot read property 'n' of undefined **To Reproduce** I'm afraid I simply don't know, at present. **Expected behavior** The client should compile as normal. **Information about your Svelte project:** - Your operating system: Ubuntu 19.04 - Svelte version 3.16.1 - Rollup **Severity** Blocker. It's broken, and my app won't start. **Additional context** The app was previously using 3.15, and trying 3.16.0 wouldn't start either, due to an issue with `reduce with no initial value`.
https://github.com/sveltejs/svelte/issues/4077
https://github.com/sveltejs/svelte/pull/4085
85c1829093a57877d65abccdf4a335014087a974
88201f2fcf997e8ea800856c8dc1bf32cd43eab8
2019-12-09T17:04:04Z
javascript
2019-12-10T16:48:54Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,070
["src/compiler/compile/Component.ts", "test/validator/samples/missing-component-global/input.svelte", "test/validator/samples/missing-component-global/warnings.json"]
Component Not Defined not working for buildin javascript objects
**Describe the bug** ``` <String /> ``` Compiles and results in a runtime error of `string.$$ is undefined`: [REPL](https://svelte.dev/repl/1ad764d626f54d60b4b03cef168d6b85). `Math`, `Map`, `Set`, `RexExp`, etc. (resulting in other errors) Instead of `<Random />` which would result in `'Random' is not defined. Consider adding a <script> block with 'export let Random' to declare a prop (1:0)` **Expected behavior** Check if `String` is a defined Svelte Component instead of defined in javascript.
https://github.com/sveltejs/svelte/issues/4070
https://github.com/sveltejs/svelte/pull/4071
2c9d864e33feba60d5f0b47d7b71f098815814a0
3433418dceeae56ffef0cd963e4a8d7bb6358525
2019-12-08T19:40:49Z
javascript
2019-12-09T14:15:49Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,061
["src/compiler/compile/render_dom/wrappers/InlineComponent/index.ts", "test/runtime/samples/component-slot-let-in-slot/Inner.svelte", "test/runtime/samples/component-slot-let-in-slot/Outer.svelte", "test/runtime/samples/component-slot-let-in-slot/_config.js", "test/runtime/samples/component-slot-let-in-slot/main.svelte"]
Slot with props doesn't propergate changes
**Describe the bug** If a slot that passes a value back contains another slot then any changes to the value will not propagate through. **To Reproduce** [Here's a repl](https://svelte.dev/repl/14a72260fda84ddcab25aea7c3f4c993?version=3.16.0). *Outer.svelte* renders a slot and passes `text='first'` then updates it to `'second'`. *Inner.svelte* simply renders a slot. It should render `first first` then after a second change to `second second` but it instead changes to `second first` showing that the inner slot is never notified of the change. **Severity** At work I'm re-writting a very large application in svelte. I'm running into this bug frequently do to how we handle state. This very much needs to be fixed before we can push to production.
https://github.com/sveltejs/svelte/issues/4061
https://github.com/sveltejs/svelte/pull/4091
f9a9484e3918c299094403ba6f4fe8a88052bede
2cd5c2934b03c9ac3e5e984b3f1ccd3ffd657ef9
2019-12-07T01:53:23Z
javascript
2019-12-11T16:46:53Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,050
["src/compiler/compile/create_module.ts"]
Bare Imports fail when using CJS format
**Describe the bug** When using a _bare_ import in a component script (also with script in _module_ context as in thsi example) there are no [specifiers on the node at this line](https://github.com/sveltejs/svelte/blob/master/src/compiler/compile/create_module.ts#L160) which causes this error: `TypeError: Cannot read property 'type' of undefined` **To Reproduce** `a.js`: ```js // any code here - empty is fine too ``` `Component.svelte`: ```html <script context="module"> import './a'; </script> ``` `compile.js`: ```js const { readFileSync } = require('fs'); const svelte = require('svelte/compiler'); const source = readFileSync('./Component.svelte', 'utf8'); const result = svelte.compile(source, { format: 'cjs', }); console.log(result); ``` **Expected behavior** Should compile and generate `require('./a.js');` in the example provided above. **Stacktrace** ```bash /project-dir/node_modules/svelte/compiler.js:21095 id: node.specifiers[0].type === 'ImportNamespaceSpecifier' ^ TypeError: Cannot read property 'type' of undefined at /project-dir/node_modules/svelte/compiler.js:21095:41 at Array.map (<anonymous>) at cjs (/project-dir/node_modules/svelte/compiler.js:21090:36) at create_module (/project-dir/node_modules/svelte/compiler.js:21002:17) at Component.generate (/project-dir/node_modules/svelte/compiler.js:24900:14) at Object.compile (/project-dir/node_modules/svelte/compiler.js:25965:23) at Object.<anonymous> (/project-dir/compile.js:6:23) at Module._compile (internal/modules/cjs/loader.js:1121:30) at Object.Module._extensions..js (internal/modules/cjs/loader.js:1160:10) at Module.load (internal/modules/cjs/loader.js:976:32) ``` **Information about your Svelte project:** Not relevant but I'm using Svelte v3.16.0 **Severity** Blocking - I'm using Jest for testing which requires `cjs` format with `jest-transform-svelte` which forces `cjs` format which breaks on compile when using a _bare_ import.
https://github.com/sveltejs/svelte/issues/4050
https://github.com/sveltejs/svelte/pull/4051
e996ef750d31ada1ef2dfefd4aae06010dbd2ea6
aa2b4e72f7f0991cb7ec89c533c9ebd6dfe2e7cf
2019-12-04T13:10:18Z
javascript
2019-12-04T18:05:47Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,047
["rollup.config.js", "src/runtime/internal/dev.ts"]
Expose svelte version in dev mode
It would be helpful to be able to determine what version of svelte a given bundle was build with. This would simplify attempting to support both old and new versions of svelte in svelte-devtools. This hasn't been an issue so far but I'm sure it eventually will as new version change the internals more. I'm not quite sure where this would be exposed though.
https://github.com/sveltejs/svelte/issues/4047
https://github.com/sveltejs/svelte/pull/4154
33aab8708294d247310ac4318d5e51f5442ce32b
646c3df3c670e4d31db218aa0927576e1575beac
2019-12-03T16:03:34Z
javascript
2020-01-05T11:24:04Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,044
["src/compiler/compile/render_dom/wrappers/AwaitBlock.ts", "test/runtime/samples/await-then-if/_config.js", "test/runtime/samples/await-then-if/main.svelte"]
{#if} inside {#await} doesn't work
**Describe the bug** Having an `{#if}` inside of an `{#await}` using a resolved object from `{:then}` fails. **Logs** `ReferenceError: object is not defined` **To Reproduce** https://svelte.dev/repl/a5419c05b3314b83b75ce786562f2c06?version=3.16.0 **Expected behavior** it should render the if block **Information about your Svelte project:** - Firefox 70.0.1 - Manjaro GNU/Linux - 3.16.0 **Severity** It is blocking my app from upgrading.
https://github.com/sveltejs/svelte/issues/4044
https://github.com/sveltejs/svelte/pull/4065
3433418dceeae56ffef0cd963e4a8d7bb6358525
468938c573311d6eda0edc1eb91f55a48df91ea3
2019-12-03T12:36:43Z
javascript
2019-12-09T14:16:37Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,037
["src/compiler/compile/render_dom/Renderer.ts", "test/runtime/samples/bitmask-overflow-2/_config.js", "test/runtime/samples/bitmask-overflow-2/main.svelte"]
3.16 `Reduce of empty array with no initial value`
**Describe the bug** Using many vars throws under certain conditions the error: Reduce of empty array with no initial value **To Reproduce** https://svelte.dev/repl/ebb874cf3a234db6ae13c314dccd5253?version=3.16.0 This started with 3.16, reverting to 3.15 is ok
https://github.com/sveltejs/svelte/issues/4037
https://github.com/sveltejs/svelte/pull/4063
3e1e6cbd787a9ff434e8df077af48d8af1bdd217
bb5cf9ada7706fed9bb86467d2ae78c76f88b9d0
2019-12-02T09:35:58Z
javascript
2019-12-09T14:57:01Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,022
["src/compiler/compile/render_dom/wrappers/AwaitBlock.ts", "test/runtime/samples/await-then-no-context/main.svelte"]
{:then} without name for resolving value will not compile in certain circumstances
**Describe the bug** In `{await}` ... `{:then}` blocks, not specifying a name for the resolving value will cause an error which is hard to trace back to the issue. It only happens when the block contains another block(?). This did not happen in 3.15.0. `` (plugin svelte) Error: Not implemented Empty `` **To Reproduce** https://svelte.dev/repl/0eb341643bb4465ca47616f8b1cf2091?version=3.16.0 https://svelte.dev/repl/0eb341643bb4465ca47616f8b1cf2091?version=3.15.0
https://github.com/sveltejs/svelte/issues/4022
https://github.com/sveltejs/svelte/pull/4025
4e51d35dd8abb8f71602c151e428589ce5e98d10
185ff4ae041a6fcc1cd1f2be7114a3d1492d022b
2019-11-30T12:32:07Z
javascript
2019-12-04T18:05:08Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,021
["src/compiler/compile/Component.ts", "test/validator/samples/unreferenced-variables/input.svelte"]
warning thrown in 3.16.0 when using export for store
**Describe the bug** An incorrect(?) warning is thrown when exporting a variable that is exclusively used in a "$dereferenced" manner. This warning was not given in 3.15.0. **To Reproduce** ``` <script> export let store </script> <div class="{$store?'a':'b'}"></div> ``` https://svelte.dev/repl/809da99693de49acb3474159f9006dcc?version=3.15.0 https://svelte.dev/repl/809da99693de49acb3474159f9006dcc?version=3.16.0
https://github.com/sveltejs/svelte/issues/4021
https://github.com/sveltejs/svelte/pull/4027
185ff4ae041a6fcc1cd1f2be7114a3d1492d022b
e996ef750d31ada1ef2dfefd4aae06010dbd2ea6
2019-11-30T12:11:50Z
javascript
2019-12-04T18:05:29Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,018
["src/compiler/compile/render_dom/index.ts", "src/compiler/compile/render_dom/invalidate.ts", "test/js/samples/instrumentation-script-main-block/expected.js", "test/js/samples/instrumentation-script-main-block/input.svelte"]
Unnecessary `$$invalidate` calls during component creation
There's no need to instrument assignments with calls to `$$invalidate` inside the main `instance()` function body as all variables are initially set to dirty already. It wouldn't be a huge improvement, but it's unnecessary work nonetheless.
https://github.com/sveltejs/svelte/issues/4018
https://github.com/sveltejs/svelte/pull/4069
88201f2fcf997e8ea800856c8dc1bf32cd43eab8
6928284085c297faae008f398e4887c194dd8677
2019-11-30T00:14:33Z
javascript
2019-12-10T16:50:07Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
4,012
["src/compiler/compile/nodes/Binding.ts", "src/compiler/compile/nodes/shared/TemplateScope.ts", "test/validator/samples/binding-await-catch/errors.json", "test/validator/samples/binding-await-catch/input.svelte", "test/validator/samples/binding-await-then-2/errors.json", "test/validator/samples/binding-await-then-2/input.svelte", "test/validator/samples/binding-await-then/errors.json", "test/validator/samples/binding-await-then/input.svelte"]
Two-way binding to expressions involving `{#await}` `then`s should be disallowed by compiler
**Describe the bug** What the title says. See #3912 and #4008 for why this is a problem. **Logs** n/a **To Reproduce** See #3912 and #4008 for examples of code that we should disallow. **Expected behavior** Two-way binding between (inputs or component props) and (the `then` of an `{#await}` or any expression based on that) should throw an error refusing to compile. **Stacktraces** n/a **Severity** Minor-ish. It's evidently caused some confusion. **Additional context** None.
https://github.com/sveltejs/svelte/issues/4012
https://github.com/sveltejs/svelte/pull/4275
1438994bd4f51633ba5c869c26d16be2e8224213
527ddea289196f3dc4c8ca5e0d001b9c7e5ce2a0
2019-11-28T12:15:02Z
javascript
2020-01-17T03:16:06Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,999
["src/compiler/compile/nodes/EachBlock.ts", "test/validator/samples/animation-comment-siblings/errors.json", "test/validator/samples/animation-comment-siblings/input.svelte"]
#each with animate: doesn't allow comments
**Describe the bug** The combination of #each and the animate directive doesn't allow comments. **To Reproduce** See https://svelte.dev/repl/aa902b5c51fd4e79be8dda8267fe7485?version=3.15.0. There will be an error message at the bottom. If the comment is deleted, the error goes away. **Expected behavior** Comments should be ignored and not cause an error. **Severity** This prevents documenting some code.
https://github.com/sveltejs/svelte/issues/3999
https://github.com/sveltejs/svelte/pull/7435
fc19537995c8d2563345a4570e65ec6f08eb872d
d9687da63202633845e60e0538b3e075c5636ff8
2019-11-26T19:14:47Z
javascript
2022-04-12T08:48:09Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,992
["src/compiler/compile/nodes/Binding.ts", "test/runtime/samples/bindings-global-dependency/_config.js", "test/runtime/samples/bindings-global-dependency/main.svelte"]
Regression: cannot bind to Object.values object properties in #each block
https://svelte.dev/repl/ed57d9ae519a489887ab88bb53b6906e throws "Cannot set property 'mutated' of undefined" on > 3.12.1. I assume this is the result of the big structured code generation restructuring (props, btw)! Severity: you can always just bind to `data[key].value` instead of `object.value`, but the error did throw me for a loop.
https://github.com/sveltejs/svelte/issues/3992
https://github.com/sveltejs/svelte/pull/3996
2f4d77115f8e72dcf15302d8aa08b220986b661d
59b886fcbf6d028cbb10bf8b25bbe8ec89e0aca6
2019-11-25T19:01:08Z
javascript
2019-11-26T14:50:38Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,983
["src/compiler/compile/Component.ts", "test/runtime/samples/module-context-export/Foo.svelte", "test/runtime/samples/module-context-export/_config.js", "test/runtime/samples/module-context-export/main.svelte"]
Module context export not working if instance variable with same name exists
**Describe the bug** If a variable is exported from a module context and a variable with the same name is declared in a `<script>` element, the export is omitted from the module. ```js <script context="module"> export const x = 1; </script> <script> const x = 2; </script> ``` **To reproduce** Svelte REPL: https://svelte.dev/repl/0935c4be70ff446989a0517c28394e58?version=3.15.0 **Expected behavior** The compiled module should have two exports: the default component export and the module context export: ```js export default App; export { x }; // This line is missing! ``` **Information about your Svelte project** - Svelte version: 3.15.0 **Severity** This issue can easily be avoided by giving the variables different names.
https://github.com/sveltejs/svelte/issues/3983
https://github.com/sveltejs/svelte/pull/3991
34bb8119b737731f8640ccd6f342e2c9b868244c
0ab5337ca5d6297f09756504c0c427461aea52ae
2019-11-24T15:35:52Z
javascript
2019-11-26T14:05:34Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,968
["site/package-lock.json", "site/package.json"]
Broken polka version
**Describe the bug** Svelte is using polka version `^1.0.0-next.6` which can be crashed via malformed URIs, so I would recommend a quick update. https://github.com/lukeed/polka/issues/119 **Severity** Not great, not terrible.
https://github.com/sveltejs/svelte/issues/3968
https://github.com/sveltejs/svelte/pull/3980
cd21acfb3cae574b81f2f417331993374222a9de
89585847ae19f12314d61bbeccca5c1b819334ab
2019-11-21T10:44:21Z
javascript
2019-11-23T23:01:36Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,966
["test/runtime/samples/each-block-after-let/Child.svelte", "test/runtime/samples/each-block-after-let/_config.js", "test/runtime/samples/each-block-after-let/main.svelte"]
Each blocks after slot with let directive captures wrong ctx
**Describe the bug** When an each block follows a slot that uses a let directive that hides a variable of the same name in the parent then the each block incorrectly references the value from inside the slot. **To Reproduce** https://svelte.dev/repl/537557d31921471e97632c6780c0ea39?version=3.15.0 The first line `a a` shows that the initial value of the array is `['a']`. The second line `b` shows that the value of the array inside the slot is `['b']`. The last line `a b` is unexpected. It shows that the value of the array is still `['a']` yet the each block is referencing the array from the slot, `['b']`. **Expected behavior** I would expect either the each block to use the parents value or for the svelte compiler to warn about let directive variable already being defined.
https://github.com/sveltejs/svelte/issues/3966
https://github.com/sveltejs/svelte/pull/3997
d3cefd2bcb4f2d8b632869837b88fe27cd6eed2a
afe06059bf3b72667a80306b96cb7c543bca6c20
2019-11-21T04:13:50Z
javascript
2019-11-26T17:40:52Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,954
["src/compiler/compile/render_dom/index.ts", "test/runtime/samples/dev-warning-missing-data-function/_config.js", "test/runtime/samples/dev-warning-missing-data-function/main.svelte"]
Incorrect dev warning with `export function named() {}`
**Describe the bug** In dev mode, when a component exports a named function with the `function` keyword, then a warning "created without expected prop XXX" is issued in the browser console. Example: ~~~html <script> export function propOrNot() {} </script> ~~~ **Logs** ~~~ WARNING <Child> was created without expected prop 'propOrNot' ~~~ **To Reproduce** [REPL](https://svelte.dev/repl/c9a1567e2b8f4e8fb8c37b491b6a9422?version=3.15.0) **Expected behavior** No warning. **Severity** To me, zero... But I guess the fix is probably trivial. And maybe the incorrect state that leads to the warning might also be a cause for more annoying bugs?
https://github.com/sveltejs/svelte/issues/3954
https://github.com/sveltejs/svelte/pull/3984
3d0a5f8c37bd241e8990dfe0ab51aef067ec7466
34bb8119b737731f8640ccd6f342e2c9b868244c
2019-11-19T14:24:49Z
javascript
2019-11-26T14:03:50Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,948
["CHANGELOG.md", "src/runtime/internal/dom.ts", "test/runtime/samples/binding-width-height-a11y/_config.js", "test/runtime/samples/binding-width-height-a11y/main.svelte"]
bind:offsetWidth causes accessibility failure
**Describe the bug** When using `bind:offsetWidth` on an element, an <object> element is added to the dom, but does not include any accessibility information. **To Reproduce** Add `bind:offsetWidth` to any element **Expected behavior** The element should be rendered in an accessible way. Likely the most desirable behavior is to render the element with role="none". Here's the failure message I'm getting > Element does not have text that is visible to screen readers > aria-label attribute does not exist or is empty > aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty > Element has no title attribute or the title attribute is empty > Element's default semantics were not overridden with role=\"presentation\" > Element's default semantics were not overridden with role=\"none\"" **Severity** We will still use svelte, but it will likely cause us to not use the feature, which is highly annoying. ;)
https://github.com/sveltejs/svelte/issues/3948
https://github.com/sveltejs/svelte/pull/3949
39bbac4393d2845989601e216a5d0b4579e1983f
a85c250bda52aa48f196cc605f5fd39d3c807859
2019-11-18T13:55:10Z
javascript
2019-11-18T15:19:12Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,935
["CHANGELOG.md", "src/compiler/compile/render_dom/wrappers/shared/add_actions.ts", "test/runtime/samples/action-object/_config.js", "test/runtime/samples/action-object/main.svelte"]
Allow methods in use:action like: use:instance.method={....} or use:obj.method={....}
Would be nice to pass a class or an object method Can be solved with a closure ....
https://github.com/sveltejs/svelte/issues/3935
https://github.com/sveltejs/svelte/pull/5398
b3f54bd2cffa3c9f146b62f10565a5d98f068a84
254096d32041ba5bb7dd80bebffba25f31936f8a
2019-11-16T14:08:19Z
javascript
2020-09-18T16:50:18Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,929
["package-lock.json", "package.json"]
Reserved work used in prop default value outputs invalid javascript
**Describe the bug** When giving a prop a default value of an object that uses a keyword as both key, and value (i.e `{true : true}`) the svelte compiler outputs invalid JavaScript, `{true}`. **To Reproduce** https://svelte.dev/repl/2edabca108b64bcb909791bf1c5f58fa?version=3.14.1 **Expected behavior** Svelte will not collapse object literal declarations into the short form for keywords. **Information about your Svelte project:** This issue affects version 3.13.0 and up. **Severity** It is slightly annoying as I had to move the default into a separate variable for now, but not blocking in anyway.
https://github.com/sveltejs/svelte/issues/3929
https://github.com/sveltejs/svelte/pull/3931
4b5f34ec7fb1d82a258811f4b1cde690eb8953f8
bcb44c286b59b6b8a0057e137a542334bb06dc5b
2019-11-15T16:39:54Z
javascript
2019-11-16T16:42:23Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,921
[".changeset/good-buses-reply.md", "packages/svelte/src/compiler/phases/2-analyze/validation.js", "packages/svelte/src/internal/client/render.js", "packages/svelte/tests/runtime-runes/samples/bind-value-input-type-dynamic/_config.js", "packages/svelte/tests/runtime-runes/samples/bind-value-input-type-dynamic/main.svelte", "packages/svelte/tests/validator/samples/binding-input-type-dynamic/errors.json", "packages/svelte/tests/validator/samples/binding-input-type-dynamic/input.svelte"]
Provide a way to dynamically set input type (with or without two way binding)
**Is your feature request related to a problem? Please describe.** I am currently making a `Input.svelte` component to manage common logic: ```html <script> export let id; export let label; export let type = 'text'; export let value = ''; export let revealed = false; const revealToggle = (event) => { const input = event.currentTarget.previousElementSibling; if (!input) { return; } input.type = input.type === 'password' ? 'text' : 'password'; revealed = !revealed; } </script> <style> button:focus { outline: 0 !important; } </style> <label class="block mb-2" for="{id}">{label}</label> <div class="flex mb-4"> {#if type === 'password'} <input {id} type="password" placeholder="{label}" bind:value class="rounded-r-none border-r-0" > <button title="Afficher le mot de passe" type="button" class="border border-gray-400 rounded rounded-l-none px-3 text-gray-500" on:click={revealToggle} > <i class="fa fa-fw {revealed ? 'fa-eye' : 'fa-eye-slash'}"></i> </button> {:else} <input {id} type="text" placeholder="{label}" bind:value> {/if} </div> ``` It is currently not possible to assign a prop to the `type` html attribute as you well answered here: https://stackoverflow.com/a/57393751/1731473 Otherwise, it will produce this error: ``` Error: ValidationError: 'type' attribute cannot be dynamic if input uses two-way binding ``` But it is still possible to do "dynamic" type attribute with a basic `if`/`else` logic as you can see in my example. So I don't understand why things are not simpler. Nowadays, with html5, we have a ton of "text similar input" like `date`, `email`, or `tel`: https://www.w3schools.com/html/html_form_input_types.asp I would like to avoid to make a `if` forest if I only need to change the `type` attribute. Also, maybe a good place for an another issue, but I can't find an easier way to pass input related directly to the right DOM element in my component without declaring each of them manually (`min`, `max`, `required` etc...), but I don't know if this is doable. **Describe the solution you'd like** Allow to do something like this: ```html <input {id} {type} placeholder="{label}" bind:value> ``` With or without two-way binding. The goal is to quickly define what type I want from my input component: ```html <script> import Input from './Input.svelte'; </script> <Input type="text" ... /> ``` **Describe alternatives you've considered** The only alternative I found is what you have on my example. Maybe it's a design issue from my own. In that case, some good advices on this issue and the documentation would be very welcome. :+1: **How important is this feature to you?** It is not very urgent, but I think this is quite useful in order to avoid code repetition on big projects.
https://github.com/sveltejs/svelte/issues/3921
https://github.com/sveltejs/svelte/pull/10608
db0b802fc2a8d0cd75f3dc209f19e06712be5a92
506196b72b459b3219b8c3e8db6fcc67fc101974
2019-11-13T18:27:00Z
javascript
2024-02-22T17:07:49Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,914
["src/compiler/compile/render_dom/index.ts", "test/js/samples/debug-empty/expected.js", "test/js/samples/debug-foo-bar-baz-things/expected.js", "test/js/samples/debug-foo/expected.js", "test/js/samples/dev-warning-missing-data-computed/expected.js"]
Development mode warnings use array.prototype.includes which breaks bundle on IE 11
**Describe the bug** When bundling in development mode the check for unknown props utilizes the Array.prototype.includes method which isn't supported on ie 11. This causes a break on ie11 **Logs** ![image](https://user-images.githubusercontent.com/33679961/68722687-5a247600-060a-11ea-82fe-3088a26ca1a6.png) ![image](https://user-images.githubusercontent.com/33679961/68722708-68729200-060a-11ea-9fe0-2ac1c1b4965e.png) **Expected behavior** Conduitry suggested in the discord that this should be replaced with indexOf to avoid having to use a polyfill **Information about your Svelte project:** - Your browser and the version: (IE 11) - Your operating system: (Windows 7) - Svelte version (3.12..1) - Whether your project uses Webpack or **Rollup** **Severity** Renders usage in IE 11 while developing useless so decently annoying. Requires excess polyfills simply to develop although it is not a blocking issue as adding a polyfill should fix the issue.
https://github.com/sveltejs/svelte/issues/3914
https://github.com/sveltejs/svelte/pull/3915
8237db442223406d78aa560404801f0cb74a04cb
afe5ad430a741ebece0cb94a34ffe96c6d4fdfec
2019-11-13T00:43:13Z
javascript
2019-11-13T02:42:13Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,911
["src/compiler/compile/render_dom/wrappers/Element/index.ts", "test/runtime/samples/unchanged-expression-escape/_config.js", "test/runtime/samples/unchanged-expression-escape/main.svelte"]
Single-quotes are incorrectly encoded
Reported by Bobby289 in chat. Single-quotes (`'`) are being rendered in text as `&#39;`. This bug appears to have appeared in 3.13.0. - Broken case showing the bug in 3.13.0: https://svelte.dev/repl/0e69250553bc4e5ca85b1187967b9cda?version=3.13.0 - Correctly working case in 3.12.1: https://svelte.dev/repl/0e69250553bc4e5ca85b1187967b9cda?version=3.12.1 The bug still exists [in the current version, 3.14.0](https://svelte.dev/repl/0e69250553bc4e5ca85b1187967b9cda?version=3.14.0). As you can see in the REPL, ampersands aren't affected by the encoding issue, so this might be a fairly specific issue, I haven't dug any further yet.
https://github.com/sveltejs/svelte/issues/3911
https://github.com/sveltejs/svelte/pull/3916
c29e2085a192dd22f7a7122b143ca2ce09372c24
8237db442223406d78aa560404801f0cb74a04cb
2019-11-12T21:50:53Z
javascript
2019-11-13T02:41:34Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,906
["src/compiler/parse/read/script.ts", "test/sourcemaps/samples/script-after-comment/input.svelte", "test/sourcemaps/samples/script-after-comment/test.js", "test/sourcemaps/samples/two-scripts/input.svelte", "test/sourcemaps/samples/two-scripts/test.js"]
HTML comment causes misaligned sourcemap
In our project we should add license headers to source files, but when I did that in our first `.svelte` file, I experienced the generated sourcemap is incorrect and it ignores the comments. It makes the debugging more difficult and the test coverage result is useless as well. Svelte version: `3.14.0` Example `.svelte` source: ``` <!-- Some comment and more and more details --> <script> const test = () => { console.log('test'); } </script> ``` When I want to debug `test` variable it points to the 2. line of the `.svelte` file. This tool can help to visualize source map: http://evanw.github.io/source-map-visualization/ If I add the comment into the script tag, it works without any problem, but it looks stupid.
https://github.com/sveltejs/svelte/issues/3906
https://github.com/sveltejs/svelte/pull/4738
e3fef0f740fa788bba68a29f5561ad439475edbb
cf72b4157575e4a64d73c75dc26fa22bcd25f719
2019-11-12T10:30:49Z
javascript
2020-04-28T20:49:44Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,900
["package-lock.json", "package.json", "src/compiler/compile/render_dom/Block.ts", "test/runtime/samples/deconflict-block-methods/_config.js", "test/runtime/samples/deconflict-block-methods/main.svelte"]
Possible 3.13.0 issue around fragments
**Describe the bug** Upon updating to 3.13.0 I'm now seeing the following error, which seems to be related to transitions and slots (possibly) **Logs** `Unhandled Promise Rejection: TypeError: undefined is not an object (evaluating 'intro.$$.fragment')` **To Reproduce** https://svelte.dev/repl/a8d760c0fe474b238a07d684be0c39fe?version=3.13.0 **Stacktraces** If you have a stack trace to include, we recommend putting inside a `<details>` block for the sake of the thread's readability: <details> <summary>Stack trace</summary> [Error] Unhandled Promise Rejection: TypeError: undefined is not an object (evaluating 'intro.$$.fragment') intro (Anonymous Script 3 (line 1065)) transition_in (Anonymous Script 3 (line 285)) intro (Anonymous Script 3 (line 826)) transition_in (Anonymous Script 3 (line 285)) update (Anonymous Script 3 (line 890)) update (Anonymous Script 3 (line 248)) flush (Anonymous Script 3 (line 222)) promiseReactionJob </details> **Information about your Svelte project:** - Your browser and the version: Safari 13, Chrome 78, Firefox 70 - Your operating system: macOS 10.15.1 - Svelte version 3.13.0 - Whether your project uses Webpack or Rollup: Rollup **Severity** Crashing the thread and requires downgrading to 3.12.1
https://github.com/sveltejs/svelte/issues/3900
https://github.com/sveltejs/svelte/pull/3907
afe5ad430a741ebece0cb94a34ffe96c6d4fdfec
6774e336bacb8a4506c54161cc7c78c301f8262f
2019-11-11T18:38:11Z
javascript
2019-11-13T02:42:42Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,892
["src/runtime/ambient.ts", "src/runtime/index.ts", "src/runtime/internal/dev.ts"]
Export Inferred type from `*.svelte`
## Description When importing `*.svelte` files, inferred type (originating from `ambient.ts`) doesn't match internal `SveleteComponent` (and maybe rightly so). ## Use case Using runtime `SvelteComponent` type (for example within a bootstrapping function for Storybook/testing env) e.g ```typescript import { SvelteComponent } from 'svelte/types/runtime' export type StoryFunc = { (): { Component: SvelteComponent; props: any } story: { parameters: { notes: { markdown: any } } } } ``` Another example of internal type usage in [svelte-testing-library](https://github.com/testing-library/svelte-testing-library/blob/master/types/index.d.ts#L6) ## Solution Export external `SvelteComponent` (as declared in `ambient.ts`). see #3893
https://github.com/sveltejs/svelte/issues/3892
https://github.com/sveltejs/svelte/pull/3893
d67b44861ae32b3147a86686b6792c05ad388162
5b0b2d9fd2a076b14f21c29d433d9c939a51af12
2019-11-11T10:43:41Z
javascript
2019-11-14T20:43:22Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,882
["src/compiler/compile/render_dom/wrappers/Element/index.ts", "test/js/samples/hydrated-void-element/_config.js", "test/js/samples/hydrated-void-element/expected.js", "test/js/samples/hydrated-void-element/input.svelte"]
Void element 'children' get hydrated
**Describe the bug** Svelte generates code that hydrates the children of `<img>` elements and other void elements, even though there can't be any by definition. **To Reproduce** https://svelte.dev/repl/f5c696a56a234934a9556be6a696e5db?version=3.12.1 **Expected behavior** ```diff return { c() { img = element("img"); this.h() }, l(nodes) { img = claim_element(nodes, "IMG", { src: true }, false); - var img_nodes = children(img); - - img_nodes.forEach(detach); this.h(); }, h() { attr(img, "src", "donuts.jpg"); }, ``` **Severity** Mostly harmless, but easily fixed
https://github.com/sveltejs/svelte/issues/3882
https://github.com/sveltejs/svelte/pull/3884
ca6c01d11f3c4d8cd62374857f40b8be1c3aff3b
1b454bad4acd3daeb0767a0e6c5f33f1965d47fb
2019-11-09T20:47:10Z
javascript
2019-11-09T23:26:19Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,877
["src/runtime/internal/lifecycle.ts"]
createEventDispatcher detail is required in types
Types: `node_modules/svelte/types/runtime/internal/lifecycle.d.ts` Line: `export declare function createEventDispatcher(): (type: any, detail: any) => void;` WebStorm notice: ![image](https://user-images.githubusercontent.com/988471/68488068-f5090300-024c-11ea-8ee4-46c597874f48.png) But detail is optional: https://github.com/sveltejs/svelte/blob/e931a56854e3edca105f166bc747e3f47968205a/site/content/docs/03-run-time.md#createeventdispatcher (and `name` is string, not `any`)
https://github.com/sveltejs/svelte/issues/3877
https://github.com/sveltejs/svelte/pull/3890
ad2aac509d76e8611a79c6b0283b4c49135adfbe
8f83e8ad2d2632d47ecc97ef1014cfbb307362be
2019-11-08T15:32:58Z
javascript
2019-11-11T13:06:55Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,861
["site/content/tutorial/02-reactivity/04-updating-arrays-and-objects/text.md"]
[Tutorial] Add extra explanation for object reactivity
**Is your feature request related to a problem? Please describe.** There are users that are confused about how reactivity work with objects, to be more precise: ```js const childRef = obj.foo; // The tutorial don't explicity says that if now // I modify childRef it will not create an invalidation of obj childRef.bar = "new value"; // Users expect this to work, because // obj.foo.bar = "new value"; // this updates as they expect, but childRef don't // So the point its to let know new users that: obj = obj; // Will be needed in this case to update it, or work directly with the top level obj ``` **Describe the solution you'd like** Adding to the tutorial [02-reactivity/04-updating-arrays-and-objects](https://svelte.dev/tutorial/updating-arrays-and-objects) a better explanation about this case would better inform new users. The tutorial speaks about how array methods don't create an invalidation, but this case can't be understanded just with the explanation given. The user @halfnelson said a rule for this case that would help new users: > [...] it can be tricky until you are used to it but the rule is broadly "the name of the reactive variable must appear on the left of the equals to react to assignments" **Describe alternatives you've considered** An option would be to make derivated references also be reactive, but that calls for problems and I feel that just explaining to new users how it works its easier than changing the underlaying behaviour.
https://github.com/sveltejs/svelte/issues/3861
https://github.com/sveltejs/svelte/pull/3863
20451658c1a1bd287b5bf5951100bf7e6238300a
05e259c0e8391e7c103d7192faf7542bb06a7a2c
2019-11-06T15:09:04Z
javascript
2019-11-06T20:56:01Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,858
["test/runtime/samples/await-then-blowback-reactive/Widget.svelte", "test/runtime/samples/await-then-blowback-reactive/_config.js", "test/runtime/samples/await-then-blowback-reactive/main.svelte"]
Binding to select value won't set the initial value if wrapped in Promise
When options data is wrapped in promise, the initial `selected` value is undefined. https://svelte.dev/repl/602600d338a848249f4be2a3f63d4e2f?version=3.12.1 When options data is literal, the initial `selected` value is correctly set. https://svelte.dev/repl/0335847ab0d647fdb81262d6b244c480?version=3.12.1 I feel like this has something to do with how the binding is propagated/updated. But I don't know why exactly it acts like this. Is this a bug? And is there some docs about how the bindings works?
https://github.com/sveltejs/svelte/issues/3858
https://github.com/sveltejs/svelte/pull/3878
f3650a6ff60440679be1aba66c0f943adf725cd2
0052a9145b2331d3a38df8d23f0dd4c70d63af91
2019-11-06T04:53:40Z
javascript
2019-11-09T18:54:59Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,857
["src/compiler/compile/render_dom/wrappers/Element/index.ts", "test/runtime/samples/binding-input-range-change-with-max/_config.js", "test/runtime/samples/binding-input-range-change-with-max/main.svelte"]
bind:value fails on range input if max is changed at same time as value
VIa [StackOverflow](https://stackoverflow.com/questions/58615453/svelte-using-input-type-range-with-bindvalue-and-max-slider-shown-wrong-when-v). **To Reproduce** https://svelte.dev/repl/1012758496d74711b8cd2ceb4d56d8b4?version=3.12.1 **Expected behavior** The range input should look the same before and after changing `max` and `value` **Severity** Medium
https://github.com/sveltejs/svelte/issues/3857
https://github.com/sveltejs/svelte/pull/3871
47cac13b7d5dd68c494d69921397bcaf9820e441
5c08465cfa3321010e71394fe4fa6aae2722200e
2019-11-05T23:09:56Z
javascript
2019-11-10T21:22:10Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,854
["src/compiler/compile/render_dom/Block.ts"]
Component name "Block" throws error during compilation.
**Describe the bug** The component name "Block" seems to throwing the Svelte compiler off. ```html <script> import Block from "./Block.svelte" </script> <Block>my block</Block> ``` results in the error: ``` Identifier 'block' has already been declared (Note that you need plugins to import files that are not JavaScript) ``` But simply changing the component name `import Blocky from "./Block.svelte" //path is the same` works. Also, using the `Block` component more than once get's rid of the error. https://svelte.dev/repl/10c035a984e24c3b85cabd7c1455c1af?version=3.12.1 **Information about your Svelte project:** - Chrome 78 - MacOS - Svelte 3.12.1 - Rollup used
https://github.com/sveltejs/svelte/issues/3854
https://github.com/sveltejs/svelte/pull/3856
601ec45780aeec8d4f62e6438ff1af974ce25c39
5ad3f6a38ba0d67b80cca40c23e6579082ce2a34
2019-11-05T16:17:19Z
javascript
2019-11-06T11:56:12Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,845
["src/compiler/compile/utils/get_name_from_filename.ts"]
Unicode support for filenames
**Describe the bug** Filenames with Unicode characters on them produce errors. **Stacktraces** ``` ERROR in ./src/routes/简体中文/index.svelte Module build failed (from ./node_modules/svelte-loader/index.js): Error: Error: Error: Could not derive component name from file /{my-repo_name}/src/routes/简体中文/index.svelte ``` **Information about your Svelte project:** - Svelte 3.12.1, Webpack **To Reproduce** Simply name a file something like `中国.svelte` and watch it fail :sob: **Expected behavior** For this to work :wink: . **Severity** I REALLY need this! So I worked out a fix and a pull request is coming your way shortly :tada:
https://github.com/sveltejs/svelte/issues/3845
https://github.com/sveltejs/svelte/pull/3846
70de6a23c9c72a9fdda7b07a6ecb2a07e8f15a11
ced5243656d15d6b1bf5a7daa7cd2d69629cb829
2019-11-03T09:57:28Z
javascript
2019-11-06T12:16:24Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,832
["src/compiler/compile/render_dom/wrappers/Window.ts", "test/helpers.js", "test/js/samples/window-binding-scroll/expected.js", "test/runtime/samples/window-binding-scroll-store/_config.js", "test/runtime/samples/window-binding-scroll-store/main.svelte"]
Window bindings to stores don't work
Via https://stackoverflow.com/questions/58642539/save-window-binding-in-svelte-store: **Describe the bug** `<svelte:window bind:scrollY={$y}/> doesn't update the `y` store. **To Reproduce** https://svelte.dev/repl/f4589ca97ea248a7926026d8519b8980?version=3.12.1 **Expected behavior** The derived store should update. It doesn't, because only the local `$y` variable is updating. **Severity** Medium
https://github.com/sveltejs/svelte/issues/3832
https://github.com/sveltejs/svelte/pull/3835
b4c22264384b947d48ccfb7db38aecb70cf16a6d
0c8cb44d01d3908e4471ceb94dd9c79dccf8f725
2019-10-31T14:19:06Z
javascript
2019-11-03T12:50:57Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,828
["src/compiler/compile/nodes/Element.ts", "test/js/samples/bindings-readonly-order/expected.js", "test/js/samples/bindings-readonly-order/input.svelte"]
File input binding fails if type declared last
**Describe the bug** `<input type=file bind:files>` works. `<input bind:files type=file>` doesn't. Via [Stack Overflow](https://stackoverflow.com/questions/58634083/order-of-html-element-bindings-in-svelte) **Logs** > Value being assigned to HTMLInputElement.files does not implement interface FileList. **To Reproduce** https://svelte.dev/repl/b07ef4b35880412ea63683c1d33947b5?version=3.12.1 **Expected behavior** Svelte shouldn't attempt to assign to `input.files` **Severity** Low, as it's easily worked around
https://github.com/sveltejs/svelte/issues/3828
https://github.com/sveltejs/svelte/pull/3849
a0c934d0b016acc6fc95e6634fd8130ffbdb6a35
70de6a23c9c72a9fdda7b07a6ecb2a07e8f15a11
2019-10-31T13:04:37Z
javascript
2019-11-06T12:05:52Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,805
["CHANGELOG.md", "scripts/globals-extractor.mjs", "src/compiler/compile/Component.ts", "src/compiler/utils/globals.ts", "src/compiler/utils/names.ts"]
Take another sweep for known globals
(Opening in favor of https://github.com/rollup/rollup-plugin-svelte/issues/73) Our list of known globals is still somehow missing `Event`. We should probably take another sweep (through MDN? somewhere else?) for a list of the the most famous ones and add them to the set [here](https://github.com/sveltejs/svelte/blob/master/src/compiler/utils/names.ts).
https://github.com/sveltejs/svelte/issues/3805
https://github.com/sveltejs/svelte/pull/7786
f3f3d074c59c79836a42f53ecd0cece3a916ef61
feb8dfce61212affedfede786fd571dbd55905cb
2019-10-27T12:43:28Z
javascript
2022-09-04T04:13:55Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,801
["src/compiler/parse/read/style.ts", "test/validator/samples/invalid-empty-css-declaration/errors.json", "test/validator/samples/invalid-empty-css-declaration/input.svelte"]
Confusing error message "TypeError: Cannot read property 'start' of undefined" with invalid css
By mistake I had this invalid css in my component: ```css <style> .no-wrap { word-wrap: ; } </style> ``` With latest 3.12.1 I get the following compilation error: ``` Running: 'node_modules/.bin/rollup -c -w' rollup v1.25.0 bundles svelte/main.js → www/gen/bundle.js... [!] (plugin svelte) TypeError: Cannot read property 'start' of undefined svelte/GistEditor.svelte TypeError: Cannot read property 'start' of undefined at Declaration$1.minify (/Users/kjk/src/codeeval/node_modules/svelte/src/compiler/compile/css/Stylesheet.ts:148:21) at /Users/kjk/src/codeeval/node_modules/svelte/src/compiler/compile/css/Stylesheet.ts:32:15 at Array.forEach (<anonymous>) at minify_declarations (/Users/kjk/src/codeeval/node_modules/svelte/src/compiler/compile/css/Stylesheet.ts:27:15) at Rule$1.minify (/Users/kjk/src/codeeval/node_modules/svelte/src/compiler/compile/css/Stylesheet.ts:92:7) at /Users/kjk/src/codeeval/node_modules/svelte/src/compiler/compile/css/Stylesheet.ts:408:11 at Array.forEach (<anonymous>) at Stylesheet.render (/Users/kjk/src/codeeval/node_modules/svelte/src/compiler/compile/css/Stylesheet.ts:405:17) at dom (/Users/kjk/src/codeeval/node_modules/svelte/src/compiler/compile/render_dom/index.ts:33:35) at render_dom (/Users/kjk/src/codeeval/node_modules/svelte/src/compiler/compile/index.ts:86:6) ``` I understand this is invalid cs but it's hard to figure out what's wrong from the error message. Here's a repl: https://svelte.dev/repl/03ce54696b44445fbc8edbfa1c77696c?version=3.12.1
https://github.com/sveltejs/svelte/issues/3801
https://github.com/sveltejs/svelte/pull/3818
f849408a944d9ffae693f6c9e3f6765cb57f0b7c
da824c0d5fc2e1759b07735c716ba074b7d24f78
2019-10-27T05:29:15Z
javascript
2019-10-28T16:16:08Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,795
["site/src/routes/repl/[id]/_components/AppControls/index.svelte"]
REPL zip with external import omits sirv-cli dependency
**Describe the bug** If you download a REPL with an external dependency, that dependency is conveniently added to the project. Unfortunately, the required dependency `sirv-cli` is also overwritten, causing `npm run dev` to fail. **Logs** ``` $ npm run dev > [email protected] dev /svelte-app-1 > rollup -c -w rollup v1.25.2 bundles src/main.js → public/bundle.js... LiveReload enabled created public/bundle.js in 349ms [2019-10-26 00:00:00] waiting for changes... > [email protected] start:dev /svelte-app-1 > sirv public --single --dev sh: sirv: command not found npm ERR! file sh npm ERR! code ELIFECYCLE npm ERR! errno ENOENT npm ERR! syscall spawn npm ERR! [email protected] start:dev: `sirv public --single --dev` npm ERR! spawn ENOENT npm ERR! npm ERR! Failed at the [email protected] start:dev script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above. ``` **To Reproduce** 1. Go to https://svelte.dev/repl/ 2. Add a line like `import 'leftpad';` to the default `<script>` tag 3. Click the icon for "download zip file" **Expected behavior** Dependencies in `package.json` in the downloaded zip should look like this: ``` "dependencies": { "sirv-cli": "^0.4.4", "leftpad": "latest" } ``` but actually looks like this: ``` "dependencies": { "leftpad": "latest" } ```
https://github.com/sveltejs/svelte/issues/3795
https://github.com/sveltejs/svelte/pull/3796
4c239974c391d1c44adcdebaa0cd01bffd5602c4
3f6b743dd01d952c9b6e79ccad1b5b9f46d06efa
2019-10-26T19:13:56Z
javascript
2019-10-26T20:22:10Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,791
["CODE_OF_CONDUCT.md"]
Code of conduct
According to the https://opensource.guide/, Svelte should get a Code of Conduct? **Is your feature request related to a problem? Please describe.** A clear and concise description of what the problem is. For example: I'm always frustrated when [...] **Describe the solution you'd like** A clear and concise description of what you want to happen. **Describe alternatives you've considered** A clear and concise description of any alternative solutions or features you've considered. **How important is this feature to you?** Note: the more honest and specific you are here the more we will take you seriously. **Additional context** Add any other context or screenshots about the feature request here.
https://github.com/sveltejs/svelte/issues/3791
https://github.com/sveltejs/svelte/pull/7183
630ec4b32d5a46e8428625db018ec5f2aa72d17e
5ccfc3c5d7a29fe6df1cb109df8d0e7868d0ea51
2019-10-25T09:05:36Z
javascript
2022-01-25T08:48:47Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,790
["CHANGELOG.md", "src/compiler/compile/nodes/Element.ts", "src/compiler/compile/render_dom/wrappers/Element/index.ts", "src/compiler/compile/render_ssr/handlers/Element.ts", "src/runtime/internal/ssr.ts", "test/runtime/samples/spread-element-class/main.svelte", "test/runtime/samples/spread-element-scope/_config.js", "test/runtime/samples/spread-element-scope/main.svelte"]
Spread and scoping class problems
```svelte <style> div { color: red; } .bar { font-weight: bold; } </style> <div {...{ class: 'bar' }} class='foo'> This is red. </div> <div class='foo' {...{ class: 'qux' }}> This should be red. It's not because the spread clobbers the scoping class attached to the class='foo'. </div> <div {...{ class: 'bar' }}> This is red, but should also be bold. It's not because the scoping class clobbers the class='bar'. </div> ``` The style scoping class doesn't play nicely with spreads. There are a couple bad things that can happen, as shown above. There's at least one existing issue that this one intends to supersede, as well as probably some other as-yet-unreported issues. It seems to me the proper way to handle this is to (at least in the case where we have spreads, possibly all the time, not sure) stop adding the scoping class by tweaking the AST so it has a new/updated `class=` attribute. Instead, we can have a `needs_scoping` boolean on the `Element`, and when we're rendering the DOM code for this element, just do something like an `elm.className += ' svelte-xyz';`. I'd have to check whether this does the right thing if there's no class. In SSR mode, we're going to have to do something else, because you can't just programmatically add a class to an element after the fact when you're writing a string of HTML as you go. Maybe another argument to the `spread` function. There may also be problems with `class:` directives, I'm realizing now as I write this. To be investigated sometime soon. It may end up being that an additional argument to one of the spread-related helpers is the better thing to do in DOM mode as well. Or perhaps a separate function that updates a 'here are the attributes you need to mix in' object so that the `class` value (if present) includes the scoping class.
https://github.com/sveltejs/svelte/issues/3790
https://github.com/sveltejs/svelte/pull/3792
33c8cd33292405af00a500c2b860ce4b6e29e535
85692cbd5ac9f24f02c37f641feb54cdac54ca8c
2019-10-25T04:07:12Z
javascript
2019-10-25T17:03:09Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,763
["CHANGELOG.md", "src/compiler/compile/render_dom/wrappers/Slot.ts", "src/compiler/compile/render_dom/wrappers/shared/create_debugging_comment.ts", "test/runtime/samples/component-slot-fallback-2/Inner.svelte", "test/runtime/samples/component-slot-fallback-2/Outer.svelte", "test/runtime/samples/component-slot-fallback-2/_config.js", "test/runtime/samples/component-slot-fallback-2/main.svelte", "test/runtime/samples/component-slot-fallback-2/store.svelte"]
Nested slots with default value and store: Cannot read property 'value' of undefined
**Describe the bug** There is an `Outer` Component with a slot, which defaults to `Inner` component. `Inner` component consisting of an input field bound to a store writable object. If we now pass something to the slot, e.g the `Inner` component surrounded by a div, input binding will break and log an "Cannot read property 'value' of undefined" error. **Logs** ``` VM210:422 Uncaught (in promise) TypeError: Cannot read property 'value' of undefined at Object.update [as p] (eval at handle_message (VM204 about:srcdoc:13), <anonymous>:422:37) at update (eval at handle_message (VM204 about:srcdoc:13), <anonymous>:159:25) at flush (eval at handle_message (VM204 about:srcdoc:13), <anonymous>:133:17) update @ VM210:422 update @ VM210:159 flush @ VM210:133 Promise.then (async) schedule_update @ VM210:119 make_dirty @ VM210:219 eval @ VM210:253 eval @ VM210:444 set @ VM210:364 update @ VM210:372 input_input_handler @ VM210:447 ``` **To Reproduce** REPL 1 with bug: https://svelte.dev/repl/48555174f1a34bbe8268404c7a7f0b99?version=3.12.1 REPL 2 working without slot default: https://svelte.dev/repl/31a272fac83047c282a8fe721751a884?version=3.12.1 **Expected behavior** It should work like REPL 2 **Information about your Svelte project:** - Your browser and the version: Chromium: 77.0.3865.120 - Your operating system: OS X 10.15 - Svelte version: 3.12.1 **Severity** The bug is not urgent, as I can work around it by removing the slot default like in REPL 2. But its quite inconvenient
https://github.com/sveltejs/svelte/issues/3763
https://github.com/sveltejs/svelte/pull/4514
0cde17a4adf32bc91032d2b7ebba20472f38f2a1
82dce0c8fcc2d23cc0911ff9d9152ff11a2136a6
2019-10-21T19:57:05Z
javascript
2020-03-15T09:44:05Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,761
["site/content/docs/03-run-time.md", "src/runtime/motion/spring.ts", "src/runtime/motion/tweened.ts", "test/motion/index.js"]
Allow spring/tweened values to be initially undefined
**Is your feature request related to a problem? Please describe.** When using springs and tweens to describe values that are set from props, I find myself doing this sort of thing: ```html <script> import { spring } from 'svelte/motion'; export let big = false; const size = spring(big ? 100 : 20); $: size.set(big ? 100 : 20); </script> ``` In this situation I want the value of `size` to be static when the component is first created, *until* the prop changes. But it's a nuisance to have to specify `big ? 100 : 20` twice. You could create a function for it... ```js const get_size = big => big ? 100 : 20; const size = spring(get_size(big)); $: size.set(get_size(big)); ``` ...but that's arguably worse. **Describe the solution you'd like** If it were possible to call `spring` without an initial value, we could initialise it later: ```js const size = spring(); $: size.set(big ? 100 : 20); ``` Of course, it would be nice if we could initialise the store right there in the reactive declaration, as happens for non-store values, but I'm not sure what that would look like. Might be cool to be able to do this sort of thing... ```js $: <spring>$size = big ? 100 : 20; ``` ...but it's obviously invalid JS. Maybe worth coming back round to that one day, but for the meantime allowing `undefined`/`null` initial values solves the DRY problem. **How important is this feature to you?** I'm encountering this situation a lot in my current project. I think it's important that using motion be as frictionless as possible.
https://github.com/sveltejs/svelte/issues/3761
https://github.com/sveltejs/svelte/pull/3762
292017c8d43acac33fdcf141b941b7fb4034c97e
e931a56854e3edca105f166bc747e3f47968205a
2019-10-21T19:12:47Z
javascript
2019-10-28T11:18:12Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,756
["test/runtime/samples/sigil-expression-function-body/_config.js", "test/runtime/samples/sigil-expression-function-body/main.svelte"]
compiler error: this shouldn't happen! generated code is trying to use inexistent internal
Passing a function, with arguments containing "@", via prop, throws the above error until it reaches a "." Example here.... https://svelte.dev/repl/fdf62523e0db4394baca68f1fa7e73da?version=3.12.1 If you remove the "@" it works fine. Been working on a series of basic GUI components (buttons, sliders, etc.) that trigger some store or function depending on what you pass into them when I tripped across this bug. Would make doing anything related email addresses impossible. Appreciate the help and everything going on here! Loving Svelte so far though!
https://github.com/sveltejs/svelte/issues/3756
https://github.com/sveltejs/svelte/pull/3770
ebf7a9024a47a5dd40a9e43c6c589bb6c1ffa449
614393edcba4806300d0601919e8b70d5b81be68
2019-10-21T01:17:50Z
javascript
2019-10-22T13:22:25Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,752
["package-lock.json", "package.json", "src/compiler/parse/acorn.ts", "src/compiler/parse/read/script.ts"]
Compiler throws exception with simultaneous default and named import [@next]
**Describe the bug** An exception is thrown from somewhere inside code-red when compiling a component that contains an import of both a default and named export. **Logs** see compiler stacktrace below **To Reproduce** ```svelte <script> import foo, { bar } from 'baz'; </script> ``` **Expected behavior** Compiling as expected, as with 3.12.1. **Stacktraces** ``` Cannot read property 'type' of undefined at handle (.../node_modules/svelte/compiler.js:13825:33) at .../node_modules/svelte/compiler.js:14392:20 at Array.map (<anonymous>) at ImportDeclaration (.../node_modules/svelte/compiler.js:14391:41) at handle (.../node_modules/svelte/compiler.js:13831:10) at .../node_modules/svelte/compiler.js:14004:39 at Array.map (<anonymous>) at handle_body (.../node_modules/svelte/compiler.js:14004:22) at Program (.../node_modules/svelte/compiler.js:14058:11) at handle (.../node_modules/svelte/compiler.js:13831:10) ``` **Information about your Svelte project:** - Svelte 3.13.0-alpha.0 **Severity** This would personally prevent me from updating Svelte. **Additional context** None.
https://github.com/sveltejs/svelte/issues/3752
https://github.com/sveltejs/svelte/pull/3757
fca35def5389c8c132b80882d3cf4154d77bf4e9
d976203da8d8feb41d870580aa1edc86c6ea5161
2019-10-19T19:31:20Z
javascript
2019-10-21T15:19:42Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,735
["src/compiler/compile/render_dom/index.ts", "test/runtime/samples/store-imported/_config.js"]
[svelte@next] Fails to compile with imported stores
Compilation Error: `Unexpected token (Note that you need plugins to import files that are not JavaScript)`. REPL: https://svelte.dev/repl/8c33aff5b60b4eb49e721c7b2692862a?version=3.13.0-alpha.0 This works with `version=3.12`. The package that I am using here exports stores. The `ready` store is defined like this in the package: ```ts import { writable, derived, Writable } from 'svelte/store' const _ready = writable<boolean>(false) export const ready = derived<boolean, Writable<boolean>>( _ready, $_ready => $_ready ) ``` (The package.json of the package only exports a `module` and no `main`, if that helps.)
https://github.com/sveltejs/svelte/issues/3735
https://github.com/sveltejs/svelte/pull/3751
8d7d0ff7dd7b248ca6d9b6b4cac098430c6e6ffa
914d155d9f2b8f93f5ef44ed84c76581187f9111
2019-10-18T11:36:16Z
javascript
2019-10-19T19:20:46Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,724
["src/compiler/compile/render_dom/Block.ts", "test/js/samples/debug-no-dependencies/expected.js", "test/js/samples/deconflict-builtins/expected.js", "test/js/samples/each-block-array-literal/expected.js", "test/js/samples/each-block-keyed-animated/expected.js", "test/js/samples/each-block-keyed/expected.js", "test/runtime/samples/deconflict-builtins-2/_config.js", "test/runtime/samples/deconflict-builtins-2/main.svelte"]
"Text is not a function" (svelte@next)
**Describe the bug** Can't render a component with a SVG tag `<text />`. **To Reproduce** https://svelte.dev/repl/1a13e6014a5140c69c25d809266478e9?version=3.13.0-alpha.0 **Information about your Svelte project:** - Svelte version 3.13.0-alpha.0
https://github.com/sveltejs/svelte/issues/3724
https://github.com/sveltejs/svelte/pull/3727
e3953b234c47c1337e3fc17ca33332f537182bc6
fca35def5389c8c132b80882d3cf4154d77bf4e9
2019-10-17T07:51:59Z
javascript
2019-10-21T15:19:15Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,708
["src/compiler/compile/nodes/shared/Expression.ts"]
List of known globals should only ever affect generated warnings
#3674 and its fix revealed some weird behavior that might be fixed, but there's still definitely some weird code present. The list of known `globals` really should only ever be used for the purposes of deciding whether to return warnings when compiling, but should have no effect on the generated code itself. Whether generated code treats something like a global should depend solely on whether it's declared/imported in the script block. This feels adjacent to what I mentioned [here](https://github.com/sveltejs/svelte/issues/3607#issuecomment-541986044), or at least these two things might make sense to clean up at the same time.
https://github.com/sveltejs/svelte/issues/3708
https://github.com/sveltejs/svelte/pull/3746
39b387a4546d36cf6a4d045f4439e8197cd6cda4
0d36f1a7941dc11b75d44f329ae7efddffffd25d
2019-10-15T00:43:44Z
javascript
2019-10-20T11:35:52Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,681
["CHANGELOG.md", "src/runtime/internal/dom.ts", "test/runtime/samples/spread-element-readonly/_config.js", "test/runtime/samples/spread-element-readonly/main.svelte", "test/server-side-rendering/samples/spread-attributes/_expected.html", "test/server-side-rendering/samples/spread-attributes/main.svelte"]
Spread operator doesn't work with "form" and "list" attributes
**Describe the bug** I'll try set `list` and `form` with spread operator: ```js let [type, form, list] = ['text', 'myID', 'listID']; let props = {type, form, list}; ``` It works in regular case: ```html <input type={type} form={form} list={list}> ``` But fails with spread operator: ```html <input {...props}> ``` **Logs** Firefox: `setting getter-only property "form"` Chrome: `Cannot assign to read only property 'form' of object '#<HTMLInputElement>'` And if we remove "form" attribute: Firefox: `setting getter-only property "list"` Chrome: `Cannot assign to read only property 'list' of object '#<HTMLInputElement>'` **To Reproduce** [REPL](https://svelte.dev/repl/21720817a9464905934d7fbfe8216739?version=3.12.1)
https://github.com/sveltejs/svelte/issues/3681
https://github.com/sveltejs/svelte/pull/3687
43245a30fd051904f90b80cebbcc97d38c4484ee
57aeddcf859ffe474f17dbfbe484d2c4a048019c
2019-10-10T18:12:23Z
javascript
2019-10-11T22:00:49Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,680
["CHANGELOG.md", "src/compiler/compile/render_dom/wrappers/Element/Attribute.ts", "src/compiler/compile/render_dom/wrappers/Element/index.ts", "src/runtime/internal/dom.ts", "test/runtime/samples/binding-indirect-spread/_config.js", "test/runtime/samples/binding-indirect-spread/main.svelte"]
Radio/checkbox input with bind:group and spread props makes variable undefined
**Describe the bug** When using an input (`type="radio"` or `type="checkbox"`) with `bind:group` in combination with spread properties, it sets the bound variable to undefined when clicked. **To Reproduce** https://svelte.dev/repl/eded09217d054d5cb518712f08833437?version=3.12.1 **Severity** Semi-minor inconvenience. Having to specify each prop now instead of using a spread. And not being able to share props easily.
https://github.com/sveltejs/svelte/issues/3680
https://github.com/sveltejs/svelte/pull/4398
c3232826d4690bcf9fea780bdb0b14a56e87c20c
b6d80f485af9b2e383044efe3466e684c99620af
2019-10-10T07:00:05Z
javascript
2020-02-12T02:01:30Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,674
["src/compiler/compile/nodes/shared/Expression.ts", "test/runtime/samples/globals-shadowed-by-each-binding/_config.js", "test/runtime/samples/globals-shadowed-by-each-binding/main.svelte"]
Incorrect work #each with 'alert' as item name
[See this repl](https://svelte.dev/repl/d7858ca7293a4aadae79d1c13044bb69?version=3.12.1) This code: ``` {#each alerts as alert} <p>{alert}</p> {/each} ``` display the system alert() function instead the alerts item: ``` function alert() { [native code] } function alert() { [native code] } ``` Same problem with many system names such as `window`, `document`, `history`, ... It turns out that many good variable names are banned, also that leads to implicit errors, because I expect that local variables will override the global Server rendering works correctly, probably because there are no such global variables
https://github.com/sveltejs/svelte/issues/3674
https://github.com/sveltejs/svelte/pull/3692
e4d7f7745338852fb28cc9aa8354fc817966400f
a778e50b35474d764369f8adc4dec447968a9f39
2019-10-08T05:36:53Z
javascript
2019-10-12T12:32:11Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,662
["src/compiler/compile/Component.ts", "src/compiler/compile/render_dom/index.ts", "test/runtime/samples/store-resubscribe-export/_config.js", "test/runtime/samples/store-resubscribe-export/main.svelte"]
Stores subscriptions inside nested components are not updated as expected when the store instance is replaced
**Describe the bug** Stores subscriptions inside nested components are not updated as expected when the store instance is replaced. **To Reproduce** https://svelte.dev/repl/e2cf3bd73f58470983e3c16432cdd34c?version=3.12.1 **Expected behavior** The `Inner` component should unsubscribe from the old store instance and then subscribe to the new store instance so that the value propagates properly. **Severity** I think this is a rather niche issue, but it's blocking the development of my GraphQL client. **Additional context** I'm quite new to Svelte and Sapper, and I'm trying to build a light weight GraphQL client for use in my project. I ran in to this issue while trying to build out my route handling. If you use `preload` calls with normal filesystem based routes in Sapper you wont notice this since the component will remount. However, if you use a `...rest` route (eg for dynamic route lookups against an external service, like me) then the component wont remount and things break. This issue isn't isolated to preloading in Sapper tho, as demonstrated in the REPL example above. I tried to work around this by just returning a plain value. That was fine until I needed to add support for a `fetchMore`-style API in order to handle pagination, and encapsulating all that as a store seems like a really elegant solution. So then I tried to work around this by making the store module scoped instead to avoid creating new instances, and then everything renders and the pagination works, but it breaks horribly when enabling link prefetching. Then data from other routes will replace the current route data whenever you hover over a link, which is not really the desired behaviour. I could probably add some sort of cache and a bunch of logic to the client to work around this, but then the client wont be so small anymore :sweat_smile: From what I can tell after reading through the source it seems like the complier will only ever insert one `component_subscribe` call into the generated output, and the current `component_subscribe` implementation does not have any logic to handle when the store instance is replaced. I've been trying to figure out the best way to fix that, eg if `component_subscribe` should try to watch the component state and react accordingly, or if would be better to generate the required code inside say the `$set` method on the generated instance, but I'm a bit out of my depth here.. Thanks in advance and keep up the good work! :)
https://github.com/sveltejs/svelte/issues/3662
https://github.com/sveltejs/svelte/pull/3665
6a98febf5fb41d54c4bd1446934a6f4624657eb5
db901725ae3fa246b25234fc37602b5231ad633f
2019-10-05T14:31:36Z
javascript
2019-10-19T00:40:06Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,660
["src/runtime/internal/await_block.ts", "test/runtime/samples/await-set-simultaneous-reactive/_config.js", "test/runtime/samples/await-set-simultaneous-reactive/main.svelte"]
bind:this used in {#await} does not trigger reaction
**Describe the bug** From Stackoverflow [https://stackoverflow.com/questions/58228948/how-do-i-trigger-a-reaction-when-bindthis-is-used-in-await-in-svelte] ``` <script> import TapHere from './TapHere.svelte'; let enableButton; $: enableButtonRect = enableButton && enableButton.getBoundingClientRect(); let promise = new Promise((resolve) => { setInterval(resolve, 3000); }); </script> {#await promise} <p> waiting... </p> {:then} <div> <button bind:this={enableButton}>Enable</button> <button>Disable</button> <TapHere rect={enableButtonRect}/> </div> {/await} ``` The enableButton (and enableButtonRect) should cause TapHere component to react when the promise is resolved. If the div is not enclosed by {#await} it certainly does happen; but {#await} seems to prevent the reaction. **To Reproduce** https://svelte.dev/repl/4e0e477d6a394a83a2d79b3d1fa50525?version=3.12.1 A green "Tap Here!" message should be shown.
https://github.com/sveltejs/svelte/issues/3660
https://github.com/sveltejs/svelte/pull/3663
52c086b1b9f814ca2c8bc7a9742b5e43d69ebe81
7d9262c4216f9d779790a33c170e913386ef4456
2019-10-04T23:19:25Z
javascript
2019-10-09T16:56:20Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,631
["CHANGELOG.md", "src/compiler/compile/render_dom/wrappers/Slot.ts"]
Svelte generates code referencing undefined variables like div_nodes
Hi. I'm trying to use ESLint on the final IIFE `.js` that Svelte generates, in order to get the `no-undef` lint (usage of undefined variable). <details> <summary>.eslintrc.js</summary> ```js module.exports = { parserOptions: { ecmaVersion: 2019, sourceType: 'module', }, env: { es6: true, browser: true, node: true, }, plugins: [ 'svelte3', '@typescript-eslint/eslint-plugin' ], overrides: [ { files: ['**/*.svelte'], processor: 'svelte3/svelte3', extends: "eslint:recommended", }, { files: ['**/*.js'], rules: { "no-undef": "warn", }, }, ], } ``` </details> This gives me: ```text /path/to/bundle.js 1668:43 warning 'form_nodes' is not defined no-undef ``` Offending code in `bundle.js`: ```js l: function claim(nodes) { if (default_slot) { default_slot.l(form_nodes); } throw new Error("options.hydrate only works if the component was compiled with the `hydratable: true` option"); }, ``` `Form.svelte` is just `<form><slot /></form>` (I simplified it for the purpose of this report). If I add content to the default slot, or other HTML tags (children) to `<form>`, the issue is still there. Searching for `form_nodes` and `_nodes` in `bundle.js` gives me no results aside of the function above. If I change `Form.svelte` content to `<div><slot /></form>`, I get warning about undefined `div_nodes`. Are `<...>_nodes` in the code above intended to be `undefined`? How can I set them? Or what else can I do to get the results I want (getting "... is not defined" errors at compile time, not runtime)?
https://github.com/sveltejs/svelte/issues/3631
https://github.com/sveltejs/svelte/pull/3748
0d36f1a7941dc11b75d44f329ae7efddffffd25d
8ef32d766ad12c14aa922083af136e9d7d027206
2019-09-28T00:39:18Z
javascript
2019-10-20T11:39:11Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,624
["CHANGELOG.md", "src/runtime/internal/style_manager.ts", "test/runtime/samples/transition-css-iframe/Foo.svelte", "test/runtime/samples/transition-css-iframe/Frame.svelte", "test/runtime/samples/transition-css-iframe/_config.js", "test/runtime/samples/transition-css-iframe/main.svelte"]
Allow transitions to work within iFrames
Sometimes your app needs to run within an iframe. For example, Intercom's chat widget which needs to be style-sandboxed from the rest of the page is run in an iFrame. My app wraps a navigation component inside an iFrame for better performance in the rest of the page. The only thing that can't be worked around in this situation is Svelte's CSS transitions. They add the animation styles to the global (top-level) document and not the component's document. For Svelte's transitions to work, Svelte will need to support adding styles to the document a component lives in. I've created a solution which works well and avoids memory leaks. I reference this ticket in the PR.
https://github.com/sveltejs/svelte/issues/3624
https://github.com/sveltejs/svelte/pull/3625
c46b3727f11132cf765028522d97f3fedf91c051
966aae3420ed6474fee296ddb120aa4b68fb75e1
2019-09-26T19:52:53Z
javascript
2020-03-14T20:37:27Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,623
["site/content/docs/02-template-syntax.md"]
{#await expression catch error} control structure for #await block
There are cases where a dev may use data returned from a single promise in multiple places within a template. In the event of an error, it may be desirable to display an error message in a single location rather than in catch scope every place there is an `#await` block associated with that promise. Currently, the Svelte syntax does not make this easy to do. For example: ```svelte <script> let promise = fetchSomeData(); </script> {#await promise} <p>waiting for the promise to resolve...</p> {:then value} <p>The value is {value.firstPart}</p> {:catch error} <p>Something went wrong: {error.message}</p> {/await} ... {#await promise} <p>waiting for the promise to resolve...</p> {:then value} <p>The value is {value.secondPart}</p> {:catch error} <p>I'm starting to repeat myself: {error.message}</p> {/await} ``` ## Proposed solution Svelte currently provides three control structures within an `#await` block: `{#await expression}...{:then name}...{:catch name}...{/await}` `{#await expression}...{:then name}...{/await}` `{#await expression then name}...{/await}` I propose adding a fourth: `{#await expression catch name}...{/await}` In the event that no error is thrown the content within this structure would never be rendered. This would allow you to address the problem as below: ```svelte <script> let promise = fetchSomeData(); </script> {#await promise catch error} <p>You're not going to see anything below because of {error.message}</p> {/await} ... {#await promise} <p>waiting for the promise to resolve...</p> {:then value} <p>The value is {value.firstPart}</p> {/await} ... {#await promise} <p>waiting for the promise to resolve...</p> {:then value} <p>The value is {value.secondPart}</p> {/await} ``` ## Possible alternatives I considered whether this could already be achieved in some manner within Svelte. However, a structure such as the following currently returns no output under any conditions: ```svelte {#await promise} {:catch error} <p>{error.message} in one place</p> {/await} ``` That's probably a good thing as such a structure is not very idiomatic. To achieve something that's comparable with the proposed solution above you have to insert empty tags or insert some content for the sake of it, which is also not ideal: ```svelte {#await promise} <p></p> {:then value} <p></p> {:catch error} <p>{error.message} in one place</p> {/await} ``` This is not a make-or-break feature for me but would be a nice addition to Svelte, I suspect it would be unlikely to clash with other features, and would make the syntax even more expressive. Thanks for the great library!
https://github.com/sveltejs/svelte/issues/3623
https://github.com/sveltejs/svelte/pull/5682
02e560c9dafbbe295d46df4ee9c9c9ffd5d9156c
e750b7284e2edfde71ef93957c01d243ae57d9ac
2019-09-26T14:37:36Z
javascript
2020-11-17T10:41:35Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,608
["src/runtime/internal/Component.ts"]
Extending HTMLElement crashes in iOS 9
**Describe the bug** A web app fully developed in svelte (without SSR) displays blank because the framework fails to initialize. With some effort of debugging, I found out the cause was here in `svelte/internal`: ``` let SvelteElement; if (typeof HTMLElement !== 'undefined') { SvelteElement = class extends HTMLElement { // culprit ``` Interestingly `HTMLElement` is not undefined in iOS 9 but its not a class (function) either. `typeof HTMLElement` equals to `"object"` in iOS 9.This causes the script to throw and stop running before anything can be seen. The error wasn't that apparent actually. I used Babel to transpile es6 to es5, which changes class to functions. After transpile there is a native function check: ``` function _isNativeFunction(fn) { return Function.toString.call(fn).indexOf("[native code]") !== -1; } ``` You can try this out in Babel REPL by writing `class A extends HTMLElement {}`. And with this, the browser would run `Function.toString.call(HTMLElement)`, which is also faulty if HTMLElement is not a function. **Logs** The log on iOS 9 is quite vague: ``` TypeError: Type error ``` **To Reproduce** Just run something written with Svelte on a iOS 9 device. If you can't find one, you can try it out on XCode iPhone simulator just as I did. **Expected behavior** Forget about SvelteElement if HTMLElement isn't extendable. **Information about your Svelte project:** - Your browser and the version: Safari and iOS UIWebView - Your operating system: (e.x. OS X 10, Ubuntu Linux 19.10, Windows XP, etc) - Svelte version: 3.12.1 - Whether your project uses Webpack or Rollup: both, the same **Severity** Severe as iOS 9 users are completely unusable because of `SvelteElement` which is not used at all. There's still 0.7% of my app users with this OS version. **Additional context** I'm actually curious why SvelteElement wasn't dropped by rollup. It's not used at all in my app.
https://github.com/sveltejs/svelte/issues/3608
https://github.com/sveltejs/svelte/pull/3609
729bb12d175dbc3003be6d159f54d1af03b8359d
0eb825b45804ab56cac52763b064b06a673ff4a5
2019-09-22T12:50:09Z
javascript
2019-10-09T17:09:29Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,607
["src/compiler/compile/Component.ts"]
Issue with process.env inside props within loops or await blocks
I am building the app using Webpack, and I'm using [dotenv-webpack](https://webpack.js.org/plugins/environment-plugin/#dotenvplugin) to load a `.env` file and have the variables exposed as `process.env` inside the client-side app. For example, I can have this `.env` file: ````sh APP_URL="http://localhost:3000" ```` In my code I can then use `process.env.APP_URL` to retrieve that value. This also works inside Svelte statements: ````svelte <a href="{process.env.APP_URL}/something">Something</a> ```` This works. However, if this is put inside a loop (`{#each...}`) or a "then" block (`{#await ...}{:then ...}`), Svelte returns `undefined` for `process.env.APP_URL`. Sorry if I can't put a REPL URL, as this requires Webpack.
https://github.com/sveltejs/svelte/issues/3607
https://github.com/sveltejs/svelte/pull/3745
3e02b954887514983a62a7b14bf12309ac1fac02
39b387a4546d36cf6a4d045f4439e8197cd6cda4
2019-09-22T04:31:32Z
javascript
2019-10-20T11:34:31Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,602
["site/content/docs/03-run-time.md"]
Draw API docs reference "scale"
**Describe the bug** Under the docs relating to draw, there is a minor part of the text that references the animation as if it was scale that I encountered when reading them. > scale accepts the following parameters: <img width="693" alt="API_Docs_•_Svelte" src="https://user-images.githubusercontent.com/7583921/65364605-c5edf200-dc0a-11e9-9f26-3493685233e6.png"> **Severity** Super super minor. I only made an issue so I can reference it in a PR.
https://github.com/sveltejs/svelte/issues/3602
https://github.com/sveltejs/svelte/pull/3603
1baf78b097af6dd34f8efbcb281010dea041f9cd
44447003a9a707ed65e254e9993579548c70d710
2019-09-21T00:00:32Z
javascript
2019-09-21T15:26:27Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,595
["CHANGELOG.md", "src/compiler/compile/render_dom/wrappers/IfBlock.ts", "test/runtime/samples/if-block-compound-outro-no-dependencies/_config.js", "test/runtime/samples/if-block-compound-outro-no-dependencies/main.svelte"]
Malformed generated code in a situation I can't describe
**Describe the bug** For ```svelte {#if $foo} {:else} {#if bar()} <Baz/> {/if} {/if} ``` or alternatively ```svelte {#if $foo} {:else if bar()} <Baz/> {/if} ``` Svelte generates code like `if ((show_if == null) || ) show_if = !!(bar())`. **To Reproduce** Compile the above, and look at the invalid code that's generated. **Expected behavior** Presumably the ` || ` part just shouldn't be there, but I haven't checked whether that code would do what is expected. **Information about your Svelte project:** Svelte 3.12.1 **Severity** Medium-low-ish, probably. This seems to occur in a fairly specific situation. **Additional context** Quite possibly this will be fixed by #3539, but I wanted a record of this repro anyway.
https://github.com/sveltejs/svelte/issues/3595
https://github.com/sveltejs/svelte/pull/3749
914d155d9f2b8f93f5ef44ed84c76581187f9111
3e02b954887514983a62a7b14bf12309ac1fac02
2019-09-19T14:58:12Z
javascript
2019-10-20T11:29:33Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,591
["CHANGELOG.md", "src/compiler/compile/Component.ts", "test/runtime/samples/binding-this-store/_config.js", "test/runtime/samples/binding-this-store/main.svelte"]
bind:this fails with store
**Describe the bug** Using `bind:this` and a writable store together doesn't provide expected behavior. **Logs** No error log. **To Reproduce** Can be reproduced in REPL: ``` <script> import { writable } from 'svelte/store' let ref = writable(null) </script> <h1 bind:this={$ref}>HELLO</h1> <i>{$ref ? $ref.innerHTML : ''}</i> ``` **Expected behavior** Expect to see two lines of "HELLO". The second "HELLO" inside `<i>` didn't show up as expected. **Severity** Can be worked around. **Work around** ``` <script> import { writable } from 'svelte/store' let ref = writable({}) </script> <h1 bind:this={$ref.el}>HELLO</h1> <i>{$ref.el ? $ref.el.innerHTML : ''}</i> ```
https://github.com/sveltejs/svelte/issues/3591
https://github.com/sveltejs/svelte/pull/3743
2e2b0c9175cf720542527313b3a046f92384cb01
8d7d0ff7dd7b248ca6d9b6b4cac098430c6e6ffa
2019-09-19T08:54:50Z
javascript
2019-10-19T12:51:59Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,588
["src/compiler/compile/render_dom/wrappers/DebugTag.ts", "test/js/samples/debug-no-dependencies/_config.js", "test/js/samples/debug-no-dependencies/expected.js", "test/js/samples/debug-no-dependencies/input.svelte"]
Compile error: Nested loops with index broke after 3.9.1
**Describe the bug** You can see the exact same weird parsing behavior in the example below **Logs** Generated code is wrong, for instance when using `{@debug paneIndex}` it generates this: ![image](https://user-images.githubusercontent.com/181384/65169506-f422d480-da46-11e9-9412-0f6068fbd27b.png) (`paneIndex` is the index from `{#each ... }` loop) **To Reproduce** https://svelte.dev/repl/af7ece0c29f240ad97bf795bd3be1347?version=3.9.1 - Remove debug, it compiles properly - Remove the inner loop, and it compiles properly. - Debug is not at fault here, because in my project, the `index` is no longer passed onto nested loops which breaks my code. **Expected behavior** - Proper compilation without errors **Stacktraces** - No errors from the compiler, only compiled code gives an error **Information about your Svelte project:** - Svelte version 3.9.1 compared to every single version above **Severity** - Medium, project is live with over 100+ daily CCU. Having smooth animations is very important in my project. I would've loved to have latest transition/animations fixes which currently look a bit janky in 3.9.1, this compiler issue prevents me from upgrading.
https://github.com/sveltejs/svelte/issues/3588
https://github.com/sveltejs/svelte/pull/3702
565931dff957545bf1b8a9ea57cfc097ed1a7e83
4eb9affda1e7fd1a6ed6e4105b93e98dab44ff62
2019-09-18T17:11:23Z
javascript
2019-10-13T06:19:44Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,561
["src/runtime/internal/globals.ts"]
Make SSR environment-agnostic (don't count on 'global')
**Is your feature request related to a problem? Please describe.** We do not use Node, we use v8 instance. So, when I compile simple test page in SSR mode, I get 'Uncaught ReferenceError: global is not defined'. **Describe the solution you'd like** Add `typeof global` check here https://github.com/sveltejs/svelte/blob/64c805b66d0a05b6f9e2f07e5e9dfb2cd5af2534/src/runtime/internal/globals.ts#L3 If `global` is undefined then return {} **How important is this feature to you?** No chances, that we start using Node because of this. ( So, I had to add global mock (somehow), but better solution is to change the line, that I mentioned **Additional context** ![изображение](https://user-images.githubusercontent.com/90591/64787139-bf130f80-d578-11e9-8d7b-3ad3b6ac716d.png)
https://github.com/sveltejs/svelte/issues/3561
https://github.com/sveltejs/svelte/pull/4628
89f30dae3692fd8d013bd33f0342c7d58f195aea
085897c799dba914e553fcfac83aa3416ab23bef
2019-09-12T13:18:41Z
javascript
2020-04-06T11:01:02Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,555
["src/runtime/animate/index.ts"]
FLIP Animations janky; inside a parent with `transform:scale()`
### Problem When running **FLIP** animations on a list, if that list is inside of a parent with `transform: scale();` set to anything other than `1`, it seems that the **First** position gets calculated wrongly and causes janky animations. [Here's a reduced test case of the issue.](https://svelte.dev/repl/765bdee52e9d4537bbe78f3f7835d154?version=3.12.1) ### Reproduction Steps 1. Produce a FLIP animation list 2. Use `transform: scale()` on the list parent [Test Case](https://svelte.dev/repl/765bdee52e9d4537bbe78f3f7835d154?version=3.12.1) Please note that the `scale` value could be anything, but the problem's apparentness scales linearly with the `scale` value; if it's `<1` then the animation begins compressed, and if it's `>1` then animation begins stretched. eg: if `scale == 0.99` it's barely noticeable. if `scale == 0.1` it's exaggerated. ### Expected behavior I would expect that the FLIP animation can perform on an list which is scaled. ### Logs ~no error logs~ ### Stacktraces ~none~ ### Environment - Chrome 76.0.3x - Mac OSX Sierra 10.12 - Svelte 3.12.1 - REPL ### Severity Low ... I can't imagine this is a common use case. But I also imagine it's simply a calculation oversight which could be resolved by multiplying the `distance * scale` ### Additional context > My own use-case is an Article Editor, and the article is scaled when editing for a better view of the content. But when the user edits anything, the animations get all wonky.
https://github.com/sveltejs/svelte/issues/3555
https://github.com/sveltejs/svelte/pull/3627
004faf67f4e6e7edfc6813a40002ec3a214c1237
05cf649f802bdd430f07f33278f0b772c123ebfc
2019-09-12T02:45:29Z
javascript
2019-11-15T01:28:10Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,544
["src/compiler/compile/css/Selector.ts", "test/css/samples/omit-scoping-attribute-global-children/expected.css", "test/css/samples/omit-scoping-attribute-global-children/expected.html", "test/css/samples/omit-scoping-attribute-global-children/input.svelte", "test/css/samples/omit-scoping-attribute-global-descendants/expected.css", "test/css/samples/omit-scoping-attribute-global-descendants/expected.html", "test/css/samples/omit-scoping-attribute-global-descendants/input.svelte", "test/css/samples/omit-scoping-attribute-multiple-descendants/expected.css", "test/css/samples/omit-scoping-attribute-multiple-descendants/expected.html", "test/css/samples/omit-scoping-attribute-multiple-descendants/input.svelte"]
Dynamic class breaks CSS selector
**Describe the bug** Some style rules aren't being applied when there is a dynamic class between the root node and target node of the selector. **Logs** N/A **To Reproduce** [https://svelte.dev/repl/c122185d662a4897a4cda657d07a3027?version=3.12.0](https://svelte.dev/repl/c122185d662a4897a4cda657d07a3027?version=3.12.0) **Expected behavior** I would expect all three lines of the REPL to have red text. Only the second and third do. **Stacktraces** N/A **Information about your Svelte project:** Firefox 69.0 Arch Linux Svelte 3.12.0 **Severity** It's annoying and very unexpected, but I can work around it. **Additional context** N/A
https://github.com/sveltejs/svelte/issues/3544
https://github.com/sveltejs/svelte/pull/3679
af0557a2d41e468e98f179607693eba28c652e2e
b6798e522171f94cded4f06103f03321809be2b7
2019-09-10T14:38:07Z
javascript
2019-10-24T17:34:58Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,542
["src/compiler/compile/render_dom/wrappers/Slot.ts", "test/runtime/samples/transition-js-slot-2/Nested.svelte", "test/runtime/samples/transition-js-slot-2/_config.js", "test/runtime/samples/transition-js-slot-2/main.svelte"]
Transitioning when slot element changes does not update slot element
**Describe the bug** If a transition happens on an element that contains a slot, the slot does not properly update if it is rendered again immediately after the transition ends. **To Reproduce** https://svelte.dev/repl/46ba49b1c588454f8f4899b4b47b8df0?version=3.12.0 In the repl, 1. is an example of this bug, 2. is an example showing how if the component is transitioned out completely then the slot is updated properly. **Expected behavior** In the repl, 1. should fade out "Foo" and fade in "Bar" rather than fade out "Foo" and fade in "Foo". **Information about your Svelte project:** Chrome v76 Windows 10 Svelte v3.12.0 See REPL **Severity** Not too important as it is a corner case but additional context explains why fixing it may be useful. **Additional context** I discovered this bug because I was trying to create page transitions in sapper but could not find a elegant way of doing so which resulted in me trying this workaround and finding this bug. The main problem is that there is no way of adding a transition when a \<slot\> changes unless you add transitions to the slot contents which is a problem in sapper because there isn't an easy way of wrapping every page component to include intro and outro transitions. Fixing this bug would allow the parent component to add any kind of transitioning to \<slot\> elements.
https://github.com/sveltejs/svelte/issues/3542
https://github.com/sveltejs/svelte/pull/6042
93a5511447d8e7d8f7968ed5a8c5ffea156296a0
ebd21ae6d33102b9eabeffd1ad6b36e6deda6508
2019-09-10T12:29:14Z
javascript
2021-04-30T16:05:43Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,545
["src/compiler/compile/render_dom/Block.ts", "test/runtime/samples/sigil-component-prop/Widget.svelte", "test/runtime/samples/sigil-component-prop/_config.js", "test/runtime/samples/sigil-component-prop/main.svelte"]
Unable to handle `@` in attribute values since Svelte v3.12.0
**Describe the bug** It seems that after upgrading to Svelte 3.12.0, using an @ in an attribute value causes a compiler error on the client. This works as expected in 3.11.0 **Logs** ``` > [email protected] dev /home/ant/Projects/martin-clunes > sapper dev ✗ client compiler error: this shouldn't happen! generated code is trying to use inexistent internal 'martin_clunes' ✔ server (846ms) ✔ service worker (439ms) > Listening on http://localhost:3003 ``` **To Reproduce** https://github.com/beyonk-adventures/sapper-attribute-issue **Expected behavior** The bundle should compile correctly. **Information about your Sapper Installation:** - Sapper 0.27.0+ - Svelte 3.12.0 - Dynamic application - Rollup (haven't tried webpack) **Severity** It's annoying and broken, but can be worked around temporarily. **Additional context** This only occurs in Sapper projects, yet occurs on the client-side build.
https://github.com/sveltejs/svelte/issues/3545
https://github.com/sveltejs/svelte/pull/3546
c250793b358f6002b8f78fcda7b40008a35f6642
14ca56e9a85679e0cb003b7ac8aa32be6dc512a2
2019-09-10T12:07:58Z
javascript
2019-09-10T15:56:08Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,541
["site/content/examples/10-animations/00-animate/App.svelte"]
Animate example in docs doesn't add todos
In the [animate example](https://svelte.dev/examples#animate) in the docs, when a new todo is entered into the input and and the enter key is pressed, the new todo is not added to the todo list. This seems to be caused because the `add()` function is being called with `undefined` instead of the input. A solution to this would be to call `add(event.target)` instead of `add(this)`, which I'm happy to put up in a PR if that's an acceptable solution?
https://github.com/sveltejs/svelte/issues/3541
https://github.com/sveltejs/svelte/pull/3543
e8ad4018fc144581233a18ddf89415ccb7cfd5b7
c250793b358f6002b8f78fcda7b40008a35f6642
2019-09-10T10:28:39Z
javascript
2019-09-10T13:08:44Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,537
["src/compiler/compile/utils/invalidate.ts", "test/runtime/samples/store-unreferenced/Nested.svelte", "test/runtime/samples/store-unreferenced/_config.js", "test/runtime/samples/store-unreferenced/main.svelte", "test/runtime/samples/store-unreferenced/store.js"]
Store value not set via $-prefix if not used in template
Code for updating store value doesn't generated if store value actually not used in the component even if it used in other components. REPL: https://svelte.dev/repl/ebcbacf20ea3402c990c92c7caf81ac6?version=3.10.1 If uncomment store usage in template example start to works correctly.
https://github.com/sveltejs/svelte/issues/3537
https://github.com/sveltejs/svelte/pull/3538
670fadf260551213f22aeea29db2ada871f5773c
50ae5724d29a62af94e944cf0d8c9068e2b700d2
2019-09-08T21:46:08Z
javascript
2019-09-08T23:15:46Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,526
["src/compiler/compile/nodes/Attribute.ts", "src/compiler/compile/render_dom/wrappers/Element/Attribute.ts", "src/compiler/compile/render_dom/wrappers/Element/index.ts", "src/compiler/compile/render_dom/wrappers/InlineComponent/index.ts", "test/js/samples/component-static-var/expected.js", "test/js/samples/component-static-var/input.svelte"]
Component update code generated unnecessarily
**Describe the bug** A component with no props that could change will nevertheless get update code generated **To Reproduce** https://svelte.dev/repl/f26f7150be604723a047981635d30d0e?version=3.9.2 **Expected behavior** ```diff return { c() { foo.$$.fragment.c(); }, m(target, anchor) { mount_component(foo, target, anchor); current = true; }, - p(changed, ctx) { - var foo_changes = {}; - if (changed.y) foo_changes.x = y; - foo.$set(foo_changes); - }, + noop, i(local) { if (current) return; transition_in(foo.$$.fragment, local); current = true; }, o(local) { transition_out(foo.$$.fragment, local); current = false; }, d(detaching) { destroy_component(foo, detaching); } }; ``` **Severity** Low
https://github.com/sveltejs/svelte/issues/3526
https://github.com/sveltejs/svelte/pull/3529
c9cf65cdb0991cf3a5aa29f7f4d92c78c19427ce
b6905f8fa36b79fd9660ac13c7d180df2de59471
2019-09-07T12:51:29Z
javascript
2019-09-08T20:30:26Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,524
["src/compiler/compile/render_dom/wrappers/Element/index.ts", "test/js/samples/media-bindings/expected.js"]
Media Element Binding for set currentTime is unreliable
**Describe the bug** The [Media Element Binding](https://svelte.dev/docs#Media_element_bindings) for setting `bind:currentTime={time}` is unreliable when setting single times. For example a list of video position index markers. Clicking on an index, which sets the **currentTime**, doesn't always set the video position. Where as if I set **currentTime** via the DOM method then it does work every time. **To Reproduce** Here's a couple of examples the issue: https://svelte.dev/repl/3470317362744bf296ae78b688445448?version=3.9.2 https://svelte.dev/repl/17fecf5e4b5449a79f7eda6abc480f19?version=3.9.2
https://github.com/sveltejs/svelte/issues/3524
https://github.com/sveltejs/svelte/pull/3530
b6905f8fa36b79fd9660ac13c7d180df2de59471
1a9f6b4a09ab845b10aa8074207a14ba1d047b2a
2019-09-07T11:11:53Z
javascript
2019-09-08T20:30:42Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,522
["src/compiler/compile/render_dom/wrappers/Element/index.ts", "src/runtime/internal/dom.ts", "test/runtime/samples/svg-spread/_config.js", "test/runtime/samples/svg-spread/main.svelte"]
Spread operator doesn't work in SVG elements
**Describe the bug** When trying to fill in various attributes of an SVG element using the spread operator I get a read-only error. This seems like it might be related to the closed issue of https://github.com/sveltejs/svelte/issues/1664. If I explicitly set the attributes from an object, the SVG element renders just fine. Failing script: https://svelte.dev/repl/a9c3d921ed4e4ab7923d64d30ed3a497?version=3.9.2 A similar script that works: https://svelte.dev/repl/62e182c229f24c2ea5bd77d307de266f?version=3.9.2 **Logs** When I try the failing script above, I get this error: `Cannot assign to read only property 'x' of object '#<SVGRectElement>'` **Severity** I am trying to use Svelte to work with dynamic SVG elements, so this is a major blocker.
https://github.com/sveltejs/svelte/issues/3522
https://github.com/sveltejs/svelte/pull/3531
41f5961ef965ee6dc5e91ba94d60464ca2d3d7f0
686aa0bdc5efc1090f192b8eba9fce6bf956e90d
2019-09-06T21:32:31Z
javascript
2019-09-08T20:29:26Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,521
["CHANGELOG.md", "src/compiler/compile/render_dom/wrappers/InlineComponent/index.ts", "test/runtime/samples/spread-component-2/Widget.svelte", "test/runtime/samples/spread-component-2/_config.js", "test/runtime/samples/spread-component-2/main.svelte"]
Spread Props in Component removes Reactivity
**Describe the bug** Using the spread operator in a #each loop in variable deconstruction and use the spread props feature along side other explicit props, makes the explicit props not reactive. **Logs** See REPL **To Reproduce** https://svelte.dev/repl/3c742a2e9ab145139a64a8c344982a3e?version=3.9.2 There is a comment in the FieldSet.svelte component indicating how to remove the {...props} from being adding props to the component. Removing that will make reactivity work again. To see it work properly, you can set this to version 3.6.7 **Expected behavior** I expected to be able to use spread props along side explicit props and that everything is reactive. Note I was not able to reproduce unless the prop being spread was inside a #each and deconstructed. **Information about your Svelte project:** See REPL **Severity** This is very specific and important to the project I am working on because the spread operator is allows me to only set the variables that I want to override the defaults for. If I have to explicitly set each prop then I will end up overriding defaults that I do not want to.
https://github.com/sveltejs/svelte/issues/3521
https://github.com/sveltejs/svelte/pull/4487
3a37de364bfbe75202d8e9fcef9e76b9ce6faaa2
d802c3b266be31a509cb69f3a81666b20842f3ef
2019-09-06T20:09:32Z
javascript
2020-03-01T03:47:50Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,505
["src/compiler/compile/render_dom/wrappers/IfBlock.ts", "test/runtime/samples/if-block-static-with-else-and-outros/EEE.svelte", "test/runtime/samples/if-block-static-with-else-and-outros/RRR.svelte", "test/runtime/samples/if-block-static-with-else-and-outros/_config.js", "test/runtime/samples/if-block-static-with-else-and-outros/main.svelte", "test/runtime/samples/if-block-static-with-else/_config.js", "test/runtime/samples/if-block-static-with-else/main.svelte"]
if/else regression in 3.9.2
**Describe the bug** {#if "Eva".startsWith('E')} eee {:else} rrr {/if} will throw an error **To Reproduce** https://svelte.dev/repl/60ba4405814042e4925edc98e3bcc797?version=3.9.2 **Expected behavior** no error **Stacktraces** Rollup: Unexpected token (Note that you need **Severity** breaking change
https://github.com/sveltejs/svelte/issues/3505
https://github.com/sveltejs/svelte/pull/3518
686aa0bdc5efc1090f192b8eba9fce6bf956e90d
c9cf65cdb0991cf3a5aa29f7f4d92c78c19427ce
2019-09-04T22:21:23Z
javascript
2019-09-08T20:29:46Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,459
["src/compiler/compile/Component.ts", "src/compiler/compile/utils/checkGraphForCycles.ts", "test/runtime/samples/reactive-values-non-cyclical-declaration-order-independent/_config.js", "test/runtime/samples/reactive-values-non-cyclical-declaration-order-independent/main.svelte", "test/validator/samples/reactive-declaration-cyclical/errors.json"]
Cycle detection is broken
I sometimes get a cycle detection error when there is no cycle. There are diamonds in the graph but no cycles, and statement order in the source code matters, i.e. sometimes re-ordering the reactive statements in the code doesn't give a cycle error. **To Reproduce** https://svelte.dev/repl/c58d52de222546a0a743fe6fb158568c?version=3.9.1 **Expected behavior** No cycle detection bug error for any variant of this problem **Severity** I cannot use Svelte when it is giving spurious and incorrect error messages.
https://github.com/sveltejs/svelte/issues/3459
https://github.com/sveltejs/svelte/pull/3516
cc107147ec3715ef3d70d6506b933a54d126e84b
ee8825d34fe31137285d38fa95963c61aa2835b7
2019-08-24T13:02:23Z
javascript
2019-09-06T13:12:40Z
closed
sveltejs/svelte
https://github.com/sveltejs/svelte
3,455
["src/compiler/compile/render_dom/Block.ts", "src/compiler/compile/render_dom/wrappers/EachBlock.ts", "src/compiler/compile/render_dom/wrappers/Element/Binding.ts", "test/runtime/samples/store-each-binding-destructuring/_config.js", "test/runtime/samples/store-each-binding-destructuring/main.svelte", "test/runtime/samples/store-each-binding/_config.js", "test/runtime/samples/store-each-binding/main.svelte"]
Store binding inside each is broken
**Describe the bug** This doesn't work: ```svelte {#each $items as item, index} <input bind:value={item.text}> {/each} ``` **To Reproduce** https://svelte.dev/repl/358a3620fd6b4f159a90268a6b2035a4?version=3.9.1 **Expected behavior** Editing the text input should update the store **Severity** Seems bad **Additional context** https://stackoverflow.com/questions/57626273/svelte-component-not-re-rendering-with-new-values-if-text-input-is-inside-an-eac
https://github.com/sveltejs/svelte/issues/3455
https://github.com/sveltejs/svelte/pull/3534
1a9f6b4a09ab845b10aa8074207a14ba1d047b2a
fafb39093c9c1a75e7d8c358dd497fe098e2597b
2019-08-23T15:34:27Z
javascript
2019-09-08T20:36:49Z