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Code Issues Projects Releases Packages Wiki Activity Actions 9

LibWeb: Throw error in insertRule when rule violates constraints

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Callum Law 2025-06-21 03:16:34 +12:00 • committed by Sam Atkins
commit ef7ba02842
Notes: github-actions[bot] 2025-06-23 11:53:57 +00:00
3 changed files with 125 additions and 1 deletions
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78
Tests/LibWeb/Text/input/css/insert-rule-constraints.html Normal file
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@ -0,0 +1,78 @@
<!DOCTYPE html>
<html>
<style>
div {
}
</style>
<style>
div {
}
</style>
<style>
@import url("foo.css");
</style>
<style>
@namespace abc url("https://www.w3.org/1999/xhtml");
</style>
<style>
@media (all) {
* {
}
}
</style>
<script src="../include.js"></script>
<script>
test(() => {
try {
document.styleSheets[0].insertRule('@import url("foo.css");', 1);
println(
"Fail! insertRule should not allow inserting import rules after style rules."
);
} catch (e) {
println(`Inserting import rules after style rule throws: ${e.name}`);
}
try {
document.styleSheets[1].insertRule(
'@namespace abc url("https://www.w3.org/1999/xhtml");',
1
);
println(
"Fail! insertRule should not allow inserting namespace rules after style rules."
);
} catch (e) {
println(`Inserting namespace rules after style rule throws: ${e.name}`);
}
try {
document.styleSheets[2].insertRule(
'@namespace abc url("https://www.w3.org/1999/xhtml");',
0
);
println(
"Fail! insertRule should not allow inserting namespace rules before import rule."
);
} catch (e) {
println(`Inserting namespace rules before import rule throws: ${e.name}`);
}
try {
document.styleSheets[2].insertRule("div { color: red; }", 0);
println(
"Fail! insertRule should not allow inserting style rules before import rule."
);
} catch (e) {
println(`Inserting style rules before import rule throws: ${e.name}`);
}
try {
document.styleSheets[3].insertRule("div { color: red }", 0);
println(
"Fail! insertRule should not allow inserting style rules before namespace rule."
);
} catch (e) {
println(`Inserting style rules before namespace rule throws: ${e.name}`);
}
});
</script>
</html>