Web platform features explorer

Constructed stylesheets

The CSSStyleSheet constructor creates a new stylesheet which can be shared between a document and multiple shadow roots using adoptedStyleSheets.

Status

Baseline Widely Available (since 2025-09-27)

MDN documentation

Specifications

Browser support

  • Chrome 73 Released on 2019-03-12
  • Chrome Android 73 Released on 2019-03-12
  • Edge 79 Released on 2020-01-15
  • Firefox 101 Released on 2022-05-31
  • Firefox for Android 101 Released on 2022-05-31
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

Usage (according to Chrome Platform Status)

~9.457% of page loads. More data at chromestatus.com.

Interop

Web Platform Tests (WPT)

View the latest WPT test results for this feature

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