math-expm1.js 450 B

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  1. var nativeExpm1 = Math.expm1;
  2. var exp = Math.exp;
  3. // `Math.expm1` method implementation
  4. // https://tc39.github.io/ecma262/#sec-math.expm1
  5. module.exports = (!nativeExpm1
  6. // Old FF bug
  7. || nativeExpm1(10) > 22025.465794806719 || nativeExpm1(10) < 22025.4657948067165168
  8. // Tor Browser bug
  9. || nativeExpm1(-2e-17) != -2e-17
  10. ) ? function expm1(x) {
  11. return (x = +x) == 0 ? x : x > -1e-6 && x < 1e-6 ? x + x * x / 2 : exp(x) - 1;
  12. } : nativeExpm1;