The Math.asinh()
function returns the hyperbolic arcsine of a number, that is
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Syntax
Math.asinh(x)
Parameters
- x
- A number.
Return value
The hyperbolic arcsine of the given number.
Description
Because asinh()
is a static method of Math
, you always use it as Math.asinh()
, rather than as a method of a Math
object you created (Math
is not a constructor).
Polyfill
Math.asinh
can be emulated with the following function:
if (!Math.asinh) Math.asinh = function(x) { var absX = Math.abs(x), w if (absX < 3.725290298461914e-9) // |x| < 2^-28 return x if (absX > 268435456) // |x| > 2^28 w = Math.log(absX) + Math.LN2 else if (absX > 2) // 2^28 >= |x| > 2 w = Math.log(2 * absX + 1 / (Math.sqrt(x * x + 1) + absX)) else var t = x * x, w = Math.log1p(absX + t / (1 + Math.sqrt(1 + t))) return x > 0 ? w : -w }
Math.log1p
may also have to be polyfilled; see Math.log1p for details.
Examples
Using Math.asinh()
Math.asinh(1); // 0.881373587019543 Math.asinh(0); // 0
Specifications
Specification |
---|
ECMAScript (ECMA-262) The definition of 'Math.asinh' 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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
asinh | 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