PHP's tanh in TypeScript

How to use

Install via yarn add locutus and import: import { tanh } from 'locutus/php/math/tanh'.

Or with CommonJS: const { tanh } = require('locutus/php/math/tanh')

Use a bundler that supports tree-shaking so you only ship the functions you actually use. Vite, webpack, Rollup, and Parcel all handle this. For server-side use this is less of a concern.

Examples

These examples are extracted from test cases that automatically verify our functions against their native counterparts.

#	code	expected result
1	tanh(5.4251848798444815)	0.9999612058841574

Here's what our current TypeScript equivalent to PHP's tanh looks like.

TSTypeScript JSJavaScript TSStandalone TS JSStandalone JS

Copy code

export function tanh(arg: number): number {
  //      discuss at: https://locutus.io/php/tanh/
  // parity verified: PHP 8.3
  //     original by: Onno Marsman (https://twitter.com/onnomarsman)
  //     improved by: Robert Eisele (https://www.xarg.org/)
  //       example 1: tanh(5.4251848798444815)
  //       returns 1: 0.9999612058841574

  return 1 - 2 / (Math.exp(2 * arg) + 1)
}

export function tanh(arg) {
  //      discuss at: https://locutus.io/php/tanh/
  // parity verified: PHP 8.3
  //     original by: Onno Marsman (https://twitter.com/onnomarsman)
  //     improved by: Robert Eisele (https://www.xarg.org/)
  //       example 1: tanh(5.4251848798444815)
  //       returns 1: 0.9999612058841574

  return 1 - 2 / (Math.exp(2 * arg) + 1)
}

Improve this function

Locutus is a community effort following The McDonald's Theory: we ship first iterations, hoping others will improve them. If you see something that could be better, we'd love your contribution.

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