CSSFunctionDeclarations: style property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The read-only style property of the CSSFunctionDeclarations interface contains a CSSFunctionDescriptors object representing the descriptors available in the @function rule's body.

Value

A CSSFunctionDescriptors object.

Although the style property itself is read-only in the sense that you can't replace the CSSFunctionDescriptors object, you can still assign to the style property directly, which is equivalent to assigning to its cssText property. You can also modify the CSSFunctionDescriptors object using the setProperty() and removeProperty() methods.

Examples

See the main CSSFunctionDeclarations reference page for examples.

Specifications

Specification
CSS Functions and Mixins Module
# dom-cssfunctiondeclarations-style

Browser compatibility

desktop mobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
style
Experimental
Chrome – Full support
Chrome 139 (Release date: 2025-08-05)
footnote Full support
Edge – Full support
Edge 139 (Release date: 2025-08-07)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 123 (Release date: 2025-10-28)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 139 (Release date: 2025-08-05)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 91 (Release date: 2025-08-19)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 139 (Release date: 2025-08-05)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support
Experimental. Expect behavior to change in the future.

See also