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- 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 a = expm1(x = +x);
- var b = expm1(-x);
- return a == Infinity ? 1 : b == Infinity ? -1 : (a - b) / (exp(x) + exp(-x));
- }
- });
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