title | short-title | slug | page-type | browser-compat |
---|---|---|---|---|
CSSMathValue: operator property |
operator |
Web/API/CSSMathValue/operator |
web-api-instance-property |
api.CSSMathValue.operator |
{{APIRef("CSS Typed Object Model API")}}
The CSSMathValue.operator
read-only
property of the {{domxref("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"
.
A {{jsxref('String')}}.
Interface | Value |
---|---|
{{domxref('CSSMathSum')}} | "sum" |
{{domxref('CSSMathProduct')}} | "product" |
{{domxref('CSSMathMin')}} | "min" |
{{domxref('CSSMathMax')}} | "max" |
{{domxref('CSSMathClamp')}} | "clamp" |
{{domxref('CSSMathNegate')}} | "negate" |
{{domxref('CSSMathInvert')}} | "invert" |
We create an element with a width
determined using a calc()
function,
then {{domxref("console/log_static", "console.log()")}} the
operator
.
<div>My width has a <code>calc()</code> function</div>
We assign a width
with a calculation
div {
width: calc(50% - 0.5vw);
}
We add the JavaScript
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'
{{EmbedLiveSample("Examples", 120, 300)}}
The CSSMathValue.operator
returns sum
for the equation and
negate
for the operator on the second value.
{{Specifications}}
{{Compat}}