| 1 | var $ = require('../internals/export');
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| 2 |
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| 3 | var nativeAtanh = Math.atanh;
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| 4 | var log = Math.log;
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| 5 |
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| 6 | // `Math.atanh` method
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| 7 | // https://tc39.es/ecma262/#sec-math.atanh
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| 8 | // Tor Browser bug: Math.atanh(-0) -> 0
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| 9 | $({ target: 'Math', stat: true, forced: !(nativeAtanh && 1 / nativeAtanh(-0) < 0) }, {
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| 10 | atanh: function atanh(x) {
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| 11 | return (x = +x) == 0 ? x : log((1 + x) / (1 - x)) / 2;
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| 12 | }
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| 13 | });
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