JavaScript: Constructor and Object Oriented Programming

Constructor : 

Grammar：

     object.constructor

Example：

Javascript code:

1   function obj1() {
      this.number = 1;
  }

  var x1 = new String("Computer");
  
  if (x1.constructor == String)
      document.write("This object is a String.");
 
 var x2 = new obj1;

 if (x2.constructor == obj1)
     document.write("This object constructor is obj1.");

The code will output: 

This object is a String.

This object constructor is Obj1.

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The influence of Object Oriented Programming:

we can konw what effect Constructor has.

It can show the type that a unkown object and check the type of object we build right or not.

It also the representative in Javascript of Object Oriented Programming.

So,we can say that :

In Javascript,Constructor is the source of Object Oriented Programming