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Math.SQRT1_2

The Math.SQRT1_2 property represents the square root of 1/2 which is approximately 0.707:

$\mathtt{\mi{Math.SQRT1_2}} = \sqrt{\frac{1}{2}} = \frac{1}{\sqrt{2}} \approx 0.707$

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Property attributes of `Math.SQRT1_2`
Writable	no
Enumerable	no
Configurable	no

Description

Math.SQRT1_2 is a constant and a more performant equivalent to Math.sqrt(0.5).

Because SQRT1_2 is a static property of Math, you always use it as Math.SQRT1_2, rather than as a property of a Math object you created (Math is not a constructor).

Examples

Using Math.SQRT1_2

The following function returns 1 over the square root of 2:

function getRoot1_2() {
  return Math.SQRT1_2;
}

getRoot1_2(); // 0.7071067811865476

Specifications

Specification
ECMAScript Language Specification # sec-math.sqrt1_2

Browser compatibility

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	Deno	Node.js
`SQRT1_2`	1	12	1	3	3	1	4.4	18	4	10.1	1	1.0	1.0	0.10.0