shim.js 316 B

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  1. "use strict";
  2. var log = Math.log, LOG10E = Math.LOG10E;
  3. module.exports = function (value) {
  4. if (isNaN(value)) return NaN;
  5. value = Number(value);
  6. if (value < 0) return NaN;
  7. if (value === 0) return -Infinity;
  8. if (value === 1) return 0;
  9. if (value === Infinity) return Infinity;
  10. return log(value) * LOG10E;
  11. };