Widely Available
id: constructed-stylesheets
Constructed stylesheets
The
CSSStyleSheet constructor creates a new stylesheet which can be shared between a document and multiple shadow roots using adoptedStyleSheets.
Baseline Status:
Achieved Widely Available on Sep 27, 2025 (Cross-browser Newly Available since Mar 27, 2023).
Desktop Browser Engine Support
Google Chrome
73
Supported
Mozilla Firefox
101
Supported
Apple Safari
16.4
Supported
Microsoft Edge
79
Supported
Mobile Browser Engine Support
Chrome Android
73
Firefox Android
101
Safari iOS
16.4
Specifications and References