locutus/esm/php/math/tanh.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

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);
}