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 September 2015.
The CSS.supports() static method returns a boolean value
indicating if the browser supports a given CSS feature, or not.
Syntax
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.
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 # dom-css-supports |
Browser compatibility
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See also
- The
@supportsat-rule that allows for the same functionality but in a declarative way. - The
CSSSupportsRuleCSSOM class allowing to manipulate@supportsat-rules.