This feature is not Baseline because it does not work in some of the most widely-used browsers.
The CSSUnparsedValue interface of the CSS Typed Object Model API represents property values that reference custom properties. It consists of a list of string fragments and variable references.
Custom properties are represented by CSSUnparsedValue and var() references are represented using CSSVariableReferenceValue.
CSSUnparsedValue()Creates a new CSSUnparsedValue object.
CSSUnparsedValue.lengthReturns the number of items in the CSSUnparsedValue object.
CSSUnparsedValue.entries()Returns an array of a given object's own enumerable property [key, value] pairs in the same order as that provided by a for...in loop (the difference being that a for-in loop enumerates properties in the prototype chain as well).
CSSUnparsedValue.forEach()Executes a provided function once for each element of the CSSUnparsedValue object.
CSSUnparsedValue.keys()Returns a new array iterator object that contains the keys for each index in the CSSUnparsedValue object.
CSSUnparsedValue.values()Returns a new array iterator object that contains the values for each index in the CSSUnparsedValue object.
| Specification |
|---|
| CSS Typed OM Level 1> # cssunparsedvalue> |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
@@iterator |
66 | 79 | No | 53 | 16.4 | 66 | No | 47 | 16.4 | 9.0 | 66 | 16.4 |
CSSUnparsedValue |
66 | 79 | No | 53 | 16.4 | 66 | No | 47 | 16.4 | 9.0 | 66 | 16.4 |
CSSUnparsedValue |
66 | 79 | No | 53 | 16.4 | 66 | No | 47 | 16.4 | 9.0 | 66 | 16.4 |
entries |
66 | 79 | No | 53 | 16.4 | 66 | No | 47 | 16.4 | 9.0 | 66 | 16.4 |
forEach |
66 | 79 | No | 53 | 16.4 | 66 | No | 47 | 16.4 | 9.0 | 66 | 16.4 |
keys |
66 | 79 | No | 53 | 16.4 | 66 | No | 47 | 16.4 | 9.0 | 66 | 16.4 |
length |
66 | 79 | No | 53 | 16.4 | 66 | No | 47 | 16.4 | 9.0 | 66 | 16.4 |
values |
66 | 79 | No | 53 | 16.4 | 66 | No | 47 | 16.4 | 9.0 | 66 | 16.4 |
CSSImageValueCSSKeywordValueCSSNumericValueCSSPositionValueCSSTransformValue
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https://developer.mozilla.org/en-US/docs/Web/API/CSSUnparsedValue