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