Re: [csswg-drafts] [css-conditional-5][css-nesting-1] Feature detection for nesting (#8399)

• From: 一丝 via GitHub <sysbot+gh@w3.org>
• Date: Tue, 07 Feb 2023 04:50:23 +0000
• To: public-css-archive@w3.org
• Message-ID: <issue_comment.created-1420197844-1675745421-sysbot+gh@w3.org>

@Loirooriol 

Chrome(e.g. 109) returns `null` for `document.querySelector("&")` in browsers that don't support CSS nesting.

So, the functions detected by JS need a little adjustment:

```js
function supportsCSSNesting() {
  try {
    const s = document.querySelector("&");
    if (!s) return false;
    return true;
  } catch (e) {
    return false;
  }
}
```

Unfortunately, `@supports(selector(&))`  and `CSS.supports('selector(&)')` always returns true.
![image](https://user-images.githubusercontent.com/2784308/217151058-8475eb80-4fba-4671-9d7d-ee4bec19d464.png)





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Received on Tuesday, 7 February 2023 04:50:25 UTC