19 lines
509 B
JavaScript
19 lines
509 B
JavaScript
'use strict';
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var $ = require('../internals/export');
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var log1p = require('../internals/math-log1p');
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// eslint-disable-next-line es/no-math-atanh -- required for testing
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var $atanh = Math.atanh;
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var FORCED = !($atanh && 1 / $atanh(-0) < 0);
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// `Math.atanh` method
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// https://tc39.es/ecma262/#sec-math.atanh
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// Tor Browser bug: Math.atanh(-0) -> 0
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$({ target: 'Math', stat: true, forced: FORCED }, {
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atanh: function atanh(x) {
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var n = +x;
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return n === 0 ? n : log1p(2 * n / (1 - n)) / 2;
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}
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});
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