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<!DOCTYPE html>
<title>SyntaxError thrown when matching CSS-wide keyword</title>
<link rel="help" href="https://drafts.csswg.org/css-font-loading/#font-face-set-load">
<link rel="help" href="https://drafts.csswg.org/css-font-loading/#find-the-matching-font-faces">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
function load_on_worker(keyword) {
return new Promise((resolve, reject) =>{
var blob = new Blob([`
self.fonts.load('${keyword}').then(
()=>{ self.postMessage('success') },
(e)=>{ self.postMessage(e) }
);
`]);
var blob_url = window.URL.createObjectURL(blob);
let worker = new Worker(blob_url);
worker.onmessage = msg => {
if (msg === 'success')
resolve(msg.data)
else
reject(msg.data)
}
});
}
// https://drafts.csswg.org/css-font-loading/#find-the-matching-font-faces
// forbids CSS-wide keywords as the value of the font given to the
// load method (equivalent to the font shorthand). Note that the test
// for this case will also pass when the system-wide keyword simply
// isn't supported, since the syntax won't be valid syntax for the
// 'font' shorthand.
// https://drafts.csswg.org/css-fonts-4/#family-name-syntax also
// forbids using the CSS-wide keywords as unquoted keywords within
// <font-family>.
for (let [description_prefix, syntax_prefix] of [["", ""], ["value with ", "medium "]]) {
for (let keyword of ["initial", "inherit", "unset", "default", "revert", "revert-layer"]) {
promise_test(test => {
return promise_rejects_dom(test, 'SyntaxError', document.fonts.load(`${syntax_prefix}${keyword}`));
}, `Loading ${description_prefix}CSS-wide keyword "${keyword}" causes SyntaxError (document)`)
promise_test(test => {
return promise_rejects_dom(test, 'SyntaxError', load_on_worker(`${syntax_prefix}${keyword}`));
}, `Loading ${description_prefix}CSS-wide keyword "${keyword}" causes SyntaxError (worker)`)
}
}
</script>
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