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- // Thanks: https://github.com/monolithed/ECMAScript-6/blob/master/ES6.js
- "use strict";
- var log = Math.log;
- module.exports = function (value) {
- if (isNaN(value)) return NaN;
- value = Number(value);
- if (value < -1) return NaN;
- if (value === -1) return -Infinity;
- if (value === 0) return value;
- if (value === Infinity) return Infinity;
- if (value > -1.0e-8 && value < 1.0e-8) return value - (value * value) / 2;
- return log(1 + value);
- };
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