The Math.atanh()
function returns the hyperbolic arctangent of a number, that is
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Syntax
Math.atanh(x)
Parameters
- x
- A number.
Return value
The hyperbolic arctangent of the given number.
Description
Because atanh()
is a static method of Math
, you always use it as Math.atanh()
, rather than as a method of a Math
object you created (Math
is not a constructor).
Polyfill
For , we have so this can be emulated by the following function:
Math.atanh = Math.atanh || function(x) { return Math.log((1+x)/(1-x)) / 2; };
Examples
Using Math.atanh()
Math.atanh(-2); // NaN Math.atanh(-1); // -Infinity Math.atanh(0); // 0 Math.atanh(0.5); // 0.5493061443340548 Math.atanh(1); // Infinity Math.atanh(2); // NaN
For values greater than 1 or less than -1, NaN
is returned.
Specifications
Specification |
---|
ECMAScript (ECMA-262) The definition of 'Math.atanh' in that specification. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
atanh | Chrome Full support 38 | Edge Full support 12 | Firefox Full support 25 | IE No support No | Opera Full support 25 | Safari Full support 8 | WebView Android Full support 38 | Chrome Android Full support 38 | Firefox Android Full support 25 | Opera Android Full support 25 | Safari iOS Full support 8 | Samsung Internet Android Full support 3.0 | nodejs Full support 0.12 |
Legend
- Full support
- Full support
- No support
- No support