CSSNumericValue: add() method
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
The add() method of the CSSNumericValue interface adds a supplied number to the CSSNumericValue.
Syntax
js
add(number) Parameters
number-
Either a number or a
CSSNumericValue.
Return value
Exceptions
TypeError-
Thrown if an invalid type was passed to the method.
Examples
js
let mathSum = CSS.px("23") .add(CSS.percent("4")) .add(CSS.cm("3")) .add(CSS.in("9")); // Prints "calc(23px + 4% + 3cm + 9in)" console.log(mathSum.toString()); Specifications
| Specification |
|---|
| CSS Typed OM Level 1 # dom-cssnumericvalue-add |