- From: Xidorn Quan via GitHub <sysbot+gh@w3.org>
- Date: Thu, 24 Nov 2016 00:34:05 +0000
- To: public-css-archive@w3.org
upsuper has just created a new issue for
https://github.com/w3c/csswg-drafts:
== [cssom] Algorithm of "insert a CSS rule" should check the index
first ==
All mainstream browsers agree with the same behavior that the index is
checked first. Parsing the rule is obviously more expensive than
checking the index, so we shouldn't try to parse it if the index is
already invalid.
Test case:
```html
<!DOCTYPE html>
<style></style>
<script>
var sheet = document.styleSheets[0];
sheet.insertRule(">", 1);
</script>
```
This test case yields index error on Firefox, Chrome, and Edge, and if
you change the index argument to `0`, they all show a syntax error,
which indicates they do have a different steps than what is speced.
Please view or discuss this issue at
https://github.com/w3c/csswg-drafts/issues/753 using your GitHub
account
Received on Thursday, 24 November 2016 00:34:12 UTC