JS prototype chain (ii) The principle of the--new operator

The principle of the new operator:

First step: Create an empty object that inherits the constructor's prototype object

Step Two: Execute the constructor and point this to the empty object

Step three: Return this result if the result returned after the constructor executes is an object type, otherwise the empty object created in the first step is returned.

The principle of the new operator is      var new2 = function (func) {          var o = object.create (func.prototype);  To generate a new object, the object inherits the constructor's prototype object          var k = Func.call (o);//executes this constructor and points this to O          if (typeof k = = = ' object ') {              return k;          } else {              return o;          }      };

　　

JS prototype chain (ii) The principle of the--new operator