Experimental
This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The read-only initialValue
nullable property of the CSSPropertyRule
interface returns the initial value of the custom property registration represented by the @property
rule, controlling the property’s initial value.
Syntax
const initialValue = CSSPropertyRule.initialValue;
Value
A USVString
which is a <declaration-value>
as
defined in CSS
Syntax 3.
Examples
This stylesheet contains a single @property
rule. The first CSSRule
returned will be a CSSPropertyRule
representing this rule. The initialValue
property returns the string "#c0ffee"
this being the value of the initial-value
property in the CSS.
@property --property-name {
syntax: '<color>';
inherits: false;
initial-value: #c0ffee;
}
let myRules = document.styleSheets[0].cssRules;
console.log(myRules[0].initialValue); //the string "#c0ffee"
Specifications
Specification | Status | Comment |
---|---|---|
Unknown The definition of 'InitialValue' in that specification. |
Working Draft | Initial definition. |
Browser compatibility
BCD tables only load in the browser
The compatibility table in this page is generated from structured
data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data
and send us a pull request.