CSS: supports() static method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

The CSS.supports() static method returns a boolean value indicating if the browser supports a given CSS feature, or not.

Syntax

js
CSS.supports(propertyName, value)
CSS.supports(supportCondition)

Parameters

There are two distinct sets of parameters. The first one allows to test the support of a pair property-value:

propertyName

A string containing the name of the CSS property to check.

value

A string containing the value of the CSS property to check.

The second syntax takes one parameter matching the condition of @supports:

supportCondition

A string containing the condition to check.

Return value

true if the browser supports the rule, otherwise false.

Examples

In the following examples, result is a boolean value indicating if the browser supports the given CSS feature.

js
result = CSS.supports("text-decoration-style", "blink");
result = CSS.supports("display: flex");
result = CSS.supports("(--foo: red)");
result = CSS.supports("selector(:has(a))");
result = CSS.supports(
  "(transform-style: preserve) or (-moz-transform-style: preserve) or (-webkit-transform-style: preserve)",
);

For more examples and syntax features, see the @supports at-rule.

Specifications

Specification
CSS Conditional Rules Module Level 3
# ref-for-dom-css-supports

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
supports() static method
Parentheses for single-argument version are optional.

Legend

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

Full support
Full support

See also