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14 lines
313 B
14 lines
313 B
"use strict"; |
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var log = Math.log, LOG2E = Math.LOG2E; |
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module.exports = function (value) { |
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if (isNaN(value)) return NaN; |
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value = Number(value); |
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if (value < 0) return NaN; |
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if (value === 0) return -Infinity; |
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if (value === 1) return 0; |
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if (value === Infinity) return Infinity; |
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return log(value) * LOG2E; |
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};
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