| 1 | ;
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| 2 | var $ = require('../internals/export');
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| 3 |
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| 4 | // eslint-disable-next-line es/no-math-atanh -- required for testing
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| 5 | var $atanh = Math.atanh;
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| 6 | var log = Math.log;
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| 7 |
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| 8 | var FORCED = !($atanh && 1 / $atanh(-0) < 0);
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| 9 |
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| 10 | // `Math.atanh` method
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| 11 | // https://tc39.es/ecma262/#sec-math.atanh
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| 12 | // Tor Browser bug: Math.atanh(-0) -> 0
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| 13 | $({ target: 'Math', stat: true, forced: FORCED }, {
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| 14 | atanh: function atanh(x) {
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| 15 | var n = +x;
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| 16 | return n === 0 ? n : log((1 + n) / (1 - n)) / 2;
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| 17 | }
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| 18 | });
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