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# micromark-util-decode-numeric-character-reference
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[micromark][] utility to decode numeric character references.
## Contents
* [What is this?](#what-is-this)
* [When should I use this?](#when-should-i-use-this)
* [Install](#install)
* [Use](#use)
* [API](#api)
* [`decodeNumericCharacterReference(value, base)`](#decodenumericcharacterreferencevalue-base)
* [Types](#types)
* [Compatibility](#compatibility)
* [Security](#security)
* [Contribute](#contribute)
* [License](#license)
## What is this?
This package exposes an algorithm to decode numeric character references.
## When should I use this?
This package might be useful when you are making your own micromark extensions.
## Install
This package is [ESM only][esm].
In Node.js (version 16+), install with [npm][]:
```sh
npm install micromark-util-decode-numeric-character-reference
```
In Deno with [`esm.sh`][esmsh]:
```js
import {decodeNumericCharacterReference} from 'https://esm.sh/micromark-util-decode-numeric-character-reference@1'
```
In browsers with [`esm.sh`][esmsh]:
```html
<script type="module">
import {decodeNumericCharacterReference} from 'https://esm.sh/micromark-util-decode-numeric-character-reference@1?bundle'
</script>
```
## Use
```js
import {decodeNumericCharacterReference} from 'micromark-util-decode-numeric-character-reference'
decodeNumericCharacterReference('41', 16) // 'A'
decodeNumericCharacterReference('65', 10) // 'A'
decodeNumericCharacterReference('A', 16) // '\n'
decodeNumericCharacterReference('7F', 16) // '�' - Control
decodeNumericCharacterReference('110000', 16) // '�' - Out of range
```
## API
This module exports the identifier:
[`decodeNumericCharacterReference`][api-decode-numeric-character-reference].
There is no default export.
### `decodeNumericCharacterReference(value, base)`
Turn the number (in string form as either hexa- or plain decimal) coming from
a numeric character reference into a character.
Sort of like `String.fromCharCode(Number.parseInt(value, base))`, but makes
non-characters and control characters safe.
###### Parameters
* `value` (`string`)
— value to decode
* `base` (`number`, probably `10` or `16`)
— numeric base
###### Returns
Character (`string`).
## Types
This package is fully typed with [TypeScript][].
It exports no additional types.
## Compatibility
Projects maintained by the unified collective are compatible with all maintained
versions of Node.js.
As of now, that is Node.js 16+.
Our projects sometimes work with older versions, but this is not guaranteed.
This package works with `micromark` version 3+.
## Security
This package is safe.
See [`security.md`][securitymd] in [`micromark/.github`][health] for how to
submit a security report.
## Contribute
See [`contributing.md`][contributing] in [`micromark/.github`][health] for ways
to get started.
See [`support.md`][support] for ways to get help.
This project has a [code of conduct][coc].
By interacting with this repository, organisation, or community you agree to
abide by its terms.
## License
[MIT][license] © [Titus Wormer][author]
<!-- Definitions -->
[build-badge]: https://github.com/micromark/micromark/workflows/main/badge.svg
[build]: https://github.com/micromark/micromark/actions
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[coverage]: https://codecov.io/github/micromark/micromark
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[downloads]: https://www.npmjs.com/package/micromark-util-normalize-identifier
[bundle-size-badge]: https://img.shields.io/badge/dynamic/json?label=minzipped%20size&query=$.size.compressedSize&url=https://deno.bundlejs.com/?q=micromark-util-normalize-identifier
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[opencollective]: https://opencollective.com/unified
[npm]: https://docs.npmjs.com/cli/install
[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
[esmsh]: https://esm.sh
[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg
[chat]: https://github.com/micromark/micromark/discussions
[license]: https://github.com/micromark/micromark/blob/main/license
[author]: https://wooorm.com
[health]: https://github.com/micromark/.github
[securitymd]: https://github.com/micromark/.github/blob/main/security.md
[contributing]: https://github.com/micromark/.github/blob/main/contributing.md
[support]: https://github.com/micromark/.github/blob/main/support.md
[coc]: https://github.com/micromark/.github/blob/main/code-of-conduct.md
[typescript]: https://www.typescriptlang.org
[micromark]: https://github.com/micromark/micromark
[api-decode-numeric-character-reference]: #decodenumericcharacterreferencevalue-base
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