Re: [csswg-drafts] [css-cascade] About omitted subproperty value in shorthand

From: Xidorn Quan via GitHub <sysbot+gh@w3.org> Date: Fri, 03 Mar 2017 00:12:08 +0000 To: public-css-archive@w3.org Message-ID: <issue_comment.created-283824499-1488499927-sysbot+gh@w3.org> · This archive was generated by hypermail 2.4.0 : Tuesday, 5 July 2022 06:41:09 UTC

A probably more interesting one:
```html
<!DOCTYPE html>
<div style="background: none, none"></div>
<script>
var elem = document.querySelector('div');
alert(elem.style.cssText);
elem.style.backgroundPosition = elem.style.backgroundPosition;
alert(elem.style.cssText);
elem.style.cssText = elem.style.cssText;
alert(elem.style.cssText);
</script>
```
This has different behavior between Chrome and Safari, and they both 
fail to round-trip in this case. Their three output of `cssText` are 
completely different.

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