Note: This feature is available in Web Workers.
The CSSVariableReferenceValue interface of the CSS Typed Object Model API allows you to create a custom name for a built-in CSS value. This object functionality is sometimes called a "CSS variable" and serves the same purpose as the var() function. The custom name must begin with two dashes.
CSSVariableReferenceValue()Creates a new CSSVariableReferenceValue object.
CSSVariableReferenceValue.variableReturns the custom name passed to the constructor.
CSSVariableReferenceValue.fallback Read onlyReturns the built-in CSS value for the custom name.
None.