react app

react-app/node_modules/core-js/modules/es6.weak-map.js

@@ -0,0 +1,43 @@
+'use strict';
+var $            = require('./$')
+  , redefine     = require('./$.redefine')
+  , weak         = require('./$.collection-weak')
+  , isObject     = require('./$.is-object')
+  , has          = require('./$.has')
+  , frozenStore  = weak.frozenStore
+  , WEAK         = weak.WEAK
+  , isExtensible = Object.isExtensible || isObject
+  , tmp          = {};
+
+// 23.3 WeakMap Objects
+var $WeakMap = require('./$.collection')('WeakMap', function(get){
+  return function WeakMap(){ return get(this, arguments.length > 0 ? arguments[0] : undefined); };
+}, {
+  // 23.3.3.3 WeakMap.prototype.get(key)
+  get: function get(key){
+    if(isObject(key)){
+      if(!isExtensible(key))return frozenStore(this).get(key);
+      if(has(key, WEAK))return key[WEAK][this._i];
+    }
+  },
+  // 23.3.3.5 WeakMap.prototype.set(key, value)
+  set: function set(key, value){
+    return weak.def(this, key, value);
+  }
+}, weak, true, true);
+
+// IE11 WeakMap frozen keys fix
+if(new $WeakMap().set((Object.freeze || Object)(tmp), 7).get(tmp) != 7){
+  $.each.call(['delete', 'has', 'get', 'set'], function(key){
+    var proto  = $WeakMap.prototype
+      , method = proto[key];
+    redefine(proto, key, function(a, b){
+      // store frozen objects on leaky map
+      if(isObject(a) && !isExtensible(a)){
+        var result = frozenStore(this)[key](a, b);
+        return key == 'set' ? this : result;
+      // store all the rest on native weakmap
+      } return method.call(this, a, b);
+    });
+  });
+}