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CSSNumericValue: add() method

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

A CSSMathSum

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

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
add 66 79 No No 53 16.4 66 66 No 47 16.4 9.0

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https://developer.mozilla.org/en-US/docs/Web/API/CSSNumericValue/add