CSSMathValue: operator property
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
The CSSMathValue.operator read-only property of the CSSMathValue interface indicates the operator that the current subtype represents. For example, if the current CSSMathValue subtype is CSSMathSum, this property will return the string "sum".
Value
A String.
| Interface | Value |
|---|---|
CSSMathSum | "sum" |
CSSMathProduct | "product" |
CSSMathMin | "min" |
CSSMathMax | "max" |
CSSMathClamp | "clamp" |
CSSMathNegate | "negate" |
CSSMathInvert | "invert" |
Examples
We create an element with a width determined using a calc() function, then console.log() the operator.
html
<div>My width has a <code>calc()</code> function</div> We assign a width with a calculation
css
div { width: calc(50% - 0.5vw); } We add the JavaScript
js
const styleMap = document.querySelector("div").computedStyleMap(); console.log(styleMap.get("width")); // CSSMathSum {values: CSSNumericArray, operator: "sum"} console.log(styleMap.get("width").values); // CSSNumericArray {0: CSSUnitValue, 1: CSSMathNegate, length: 2} console.log(styleMap.get("width").operator); // 'sum' console.log(styleMap.get("width").values[1].operator); // 'negate' The CSSMathValue.operator returns sum for the equation and negate for the operator on the second value.
Specifications
| Specification |
|---|
| CSS Typed OM Level 1 # dom-cssmathvalue-operator |