CSSNumericValue: add() method

Note: This feature is available in Web Workers.

The add() method of the CSSNumericValue interface adds a supplied number to the CSSNumericValue.

Syntax

js
add()
add(number1)
add(number1, number2)
add(number1, number2, /* …, */ numberN)

Parameters

number1, …, numberN Optional

Either a number or a CSSNumericValue.

Return value

A CSSMathSum, or a CSSUnitValue if this and every argument share the same unit.

Exceptions

TypeError

Thrown if an invalid type was passed to the method.

Examples

undefined

Basic usage

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