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