react app

react-app/node_modules/core-js/modules/es6.reflect.construct.js

@@ -0,0 +1,38 @@
+// 26.1.2 Reflect.construct(target, argumentsList [, newTarget])
+var $         = require('./$')
+  , $export   = require('./$.export')
+  , aFunction = require('./$.a-function')
+  , anObject  = require('./$.an-object')
+  , isObject  = require('./$.is-object')
+  , bind      = Function.bind || require('./$.core').Function.prototype.bind;
+
+// MS Edge supports only 2 arguments
+// FF Nightly sets third argument as `new.target`, but does not create `this` from it
+$export($export.S + $export.F * require('./$.fails')(function(){
+  function F(){}
+  return !(Reflect.construct(function(){}, [], F) instanceof F);
+}), 'Reflect', {
+  construct: function construct(Target, args /*, newTarget*/){
+    aFunction(Target);
+    var newTarget = arguments.length < 3 ? Target : aFunction(arguments[2]);
+    if(Target == newTarget){
+      // w/o altered newTarget, optimization for 0-4 arguments
+      if(args != undefined)switch(anObject(args).length){
+        case 0: return new Target;
+        case 1: return new Target(args[0]);
+        case 2: return new Target(args[0], args[1]);
+        case 3: return new Target(args[0], args[1], args[2]);
+        case 4: return new Target(args[0], args[1], args[2], args[3]);
+      }
+      // w/o altered newTarget, lot of arguments case
+      var $args = [null];
+      $args.push.apply($args, args);
+      return new (bind.apply(Target, $args));
+    }
+    // with altered newTarget, not support built-in constructors
+    var proto    = newTarget.prototype
+      , instance = $.create(isObject(proto) ? proto : Object.prototype)
+      , result   = Function.apply.call(Target, instance, args);
+    return isObject(result) ? result : instance;
+  }
+});