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| 'use strict';
| var $ = require('../internals/export');
| var expm1 = require('../internals/math-expm1');
|
| var exp = Math.exp;
|
| // `Math.tanh` method
| // https://tc39.es/ecma262/#sec-math.tanh
| $({ target: 'Math', stat: true }, {
| tanh: function tanh(x) {
| var n = +x;
| var a = expm1(n);
| var b = expm1(-n);
| return a === Infinity ? 1 : b === Infinity ? -1 : (a - b) / (exp(n) + exp(-n));
| }
| });
|
|
