fix(object mixin): Add polyfill Object.is for IE

tmorehouse · web-flow · commit beed2c3d1f4f · 2017-09-05T16:25:30.000-03:00
diff --git a/lib/utils/object.js b/lib/utils/object.js
@@ -35,6 +35,20 @@ if (typeof Object.assign != "function") {
     };
 }
 
+// @link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is#Polyfill
+if (!Object.is) {
+  Object.is = function(x, y) {
+    // SameValue algorithm
+    if (x === y) { // Steps 1-5, 7-10
+      // Steps 6.b-6.e: +0 != -0
+      return x !== 0 || 1 / x === 1 / y;
+    } else {
+     // Step 6.a: NaN == NaN
+     return x !== x && y !== y;
+    }
+  };
+}
+
 export const assign = Object.assign;
 export const getOwnPropertyNames = Object.getOwnPropertyNames;
 export const keys = Object.keys;
