Math.tanh()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The Math.tanh() static method returns the hyperbolic tangent of a number. That is,
Try it
console.log(Math.tanh(-1));
/ Expected output: -0.7615941559557649
console.log(Math.tanh(0));
/ Expected output: 0
console.log(Math.tanh(Infinity));
/ Expected output: 1
console.log(Math.tanh(1));
/ Expected output: 0.7615941559557649
Syntax
js
Math.tanh(x)
Parameters
x-
A number.
Return value
The hyperbolic tangent of x.
Description
Because tanh() is a static method of Math, you always use it as Math.tanh(), rather than as a method of a Math object you created (Math is not a constructor).
Examples
Using Math.tanh()
js
Math.tanh(-Infinity); / -1
Math.tanh(-0); / -0
Math.tanh(0); / 0
Math.tanh(1); / 0.7615941559557649
Math.tanh(Infinity); / 1
Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-math.tanh |