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'use strict';
const { INVALID_CONTENT, INVALID_SRC_ATTR, INVALID_WORKER_ATTR } = require('../errors.js');
const { dedent, unescape } = require('../utils.js');
const hasCommentsOnly = text => !text
.replace(/\/\*[\s\S]*?\*\//g, '')
.replace(/^\s*(?:\/\/|#).*/gm, '')
.trim()
;
/* c8 ignore start */ // tested via integration
module.exports = element => {
const { src, worker } = element.attributes;
if (worker) {
let { value } = worker;
// throw on worker values as ambiguous
// @see https://github.com/pyscript/polyscript/issues/43
if (value) throw new SyntaxError(INVALID_WORKER_ATTR);
value = src?.value;
if (!value) {
// throw on empty src attributes
if (src) throw new SyntaxError(INVALID_SRC_ATTR);
if (!element.childElementCount)
value = element.textContent;
else {
const { innerHTML, localName, type } = element;
const name = type || localName.replace(/-script$/, '');
value = unescape(innerHTML);
console.warn(
`Deprecated: use <script type="${name}"> for an always safe content parsing:\n`,
value,
);
}
const url = URL.createObjectURL(new Blob([dedent(value)], { type: 'text/plain' }));
// TODO: should we really clean up this? debugging non-existent resources
// at distance might be very problematic if the url is revoked.
// setTimeout(URL.revokeObjectURL, 5000, url);
return url;
}
return value;
}
// validate ambiguous cases with src and not empty/commented content
if (src && !hasCommentsOnly(element.textContent))
throw new SyntaxError(INVALID_CONTENT);
};
/* c8 ignore stop */
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