CSSValue: cssValueType property

Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The cssValueType read-only property of the CSSValue interface represents the type of the current computed CSS property value.

Note: This property was part of an attempt to create a typed CSS Object Model. This attempt has been abandoned, and most browsers do not implement it.

To achieve your purpose, you can use:

Value

An unsigned short representing a code defining the type of the value. Possible values are:

Constant Description
CSS_CUSTOM The value is a custom value.
CSS_INHERIT The value is inherited and the cssText contains "inherit".
CSS_PRIMITIVE_VALUE The value is a primitive value and an instance of the CSSPrimitiveValue interface can be obtained by using binding-specific casting methods on this instance of the CSSValue interface.
CSS_VALUE_LIST The value is a CSSValue list and an instance of the CSSValueList interface can be obtained by using binding-specific casting methods on this instance of the CSSValue interface.

Examples

js
const styleDeclaration = document.styleSheets[0].cssRules[0].style;
const cssValue = styleDeclaration.getPropertyCSSValue("color");
console.log(cssValue.cssValueType);

Specifications

This feature was originally defined in the DOM Style Level 2 specification, but has been dropped from any standardization effort since then.

It has been superseded by a modern, but incompatible, CSS Typed Object Model API that is now on the standard track.

Browser compatibility