--- /dev/null
+var $ = require('../internals/export');
+
+var nativeAtanh = 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: !(nativeAtanh && 1 / nativeAtanh(-0) < 0) }, {
+ atanh: function atanh(x) {
+ return (x = +x) == 0 ? x : log((1 + x) / (1 - x)) / 2;
+ }
+});