CSSMathValue
The CSSMathValue
interface of the CSS_Object_Model#css_typed_object_model a base class for classes representing complex numeric values.
Interfaces based on CSSMathValue
Below is a list of interfaces based on the CSSMathValue interface.
Instance properties
CSSMathValue.operator
-
Indicates the operator that the current subtype represents.
Static methods
The interface may also inherit methods from its parent interface, CSSNumericValue
.
Instance methods
The interface may also inherit methods from its parent interface, CSSNumericValue
.
Event handlers
No
Examples
We create an element with a width
determined using a calc()
function, then console.log()
the operator
.
html
<div>has width</div>
We assign a width
with a calculation
css
div {
width: calc(30% - 20px);
}
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").operator); // 'sum'
console.log(styleMap.get("width").values[1].value); // -20
The CSSMathValue.operator
returns 'sum
' because styleMap.get('width').values[1].value );
is -20
: adding a negative number.
Specifications
Specification |
---|
CSS Typed OM Level 1 # complex-numeric |
Browser compatibility
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