es.math.atanh.js
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es.math.atanh.js
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	var $ = require('../internals/export');

	// eslint-disable-next-line es/no-math-atanh -- required for testing
	var $atanh = Math.atanh;
	var log = Math.log;

	// `Math.atanh` method
	// https://tc39.es/ecma262/#sec-math.atanh
	// Tor Browser bug: Math.atanh(-0) -> 0
	$({ target: 'Math', stat: true, forced: !($atanh && 1 / $atanh(-0) < 0) }, {
	atanh: function atanh(x) {
	return (x = +x) == 0 ? x : log((1 + x) / (1 - x)) / 2;
	}
	});

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