CSSFunctionRule: name 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 name property of the CSSFunctionRule interface returns a string representing the custom function's name.

Value

A string.

See the main CSSFunctionRule reference page for an example.

Specification
CSS Functions and Mixins Module # dom-cssfunctionrule-name

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`name` 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

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