--- /dev/null
+var $ = require('../internals/export');
+
+// `Number.isNaN` method
+// https://tc39.github.io/ecma262/#sec-number.isnan
+$({ target: 'Number', stat: true }, {
+ isNaN: function isNaN(number) {
+ // eslint-disable-next-line no-self-compare
+ return number != number;
+ }
+});