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Update document.adoptedStyleSheets to use newer push method #39711

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Merged
sideshowbarker merged 1 commit into from
Jun 3, 2025
Merged

Update document.adoptedStyleSheets to use newer push method #39711

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15 changes: 1 addition & 14 deletions files/en-us/web/api/document/adoptedstylesheets/index.md
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Original file line number Diff line number Diff line change
Expand Up @@ -48,7 +48,7 @@ const sheet = new CSSStyleSheet();
sheet.replaceSync("a { color: red; }");

// Apply the stylesheet to a document
document.adoptedStyleSheets = [sheet];
document.adoptedStyleSheets.push(sheet);
```

We can append a new rule to the stylesheet using {{domxref("CSSStyleSheet.insertRule()")}}.
Expand All @@ -58,19 +58,6 @@ sheet.insertRule("* { background-color: blue; }");
// The document will now have blue background.
```

### Append a new stylesheet

To append a whole new stylesheet to the `adoptedStyleSheets` property we have to create and assign a new combined array.
This is demonstrated below using spread-syntax:

```js
const extraSheet = new CSSStyleSheet();
extraSheet.replaceSync("p { color: green; }");

// Combine the existing sheets and new one
document.adoptedStyleSheets = [...document.adoptedStyleSheets, extraSheet];
```

## Sharing a stylesheet with a shadow DOM

We can share a stylesheet to a shadow root in a similar way.
Expand Down