Fix Math.signbit semantics

According [spec draft](https://tc39.es/proposal-Math.signbit/Math.signbit.html#spec), Math.signbit returns `true` only for negative values and `Math.signbit(NaN)` should return `true`
zloirock · Nov 3, 2019 · 4d002ef · 4d002ef
1 parent 306ba2c
commit 4d002ef
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/core-js/modules/esnext.math.signbit.js b/packages/core-js/modules/esnext.math.signbit.js
@@ -4,6 +4,6 @@ var $ = require('../internals/export');
 // https://github.com/tc39/proposal-Math.signbit
 $({ target: 'Math', stat: true }, {
   signbit: function signbit(x) {
-    return (x = +x) != x ? x : x == 0 ? 1 / x == Infinity : x > 0;
+    return (x = +x) == x && x == 0 ? 1 / x == Infinity : x < 0;
   }
 });