How to create Object in Javascript?

Objects in javascript:

Object in javascripts is an entity having properties and methods. For example: car pen etc.

Javascript is object oriented language.  Javascript is not class based language it is template based. So without class we can create object in javascript directly.

How to create objects in javascript:

There are three methods to create objects:

1.      By object literal

2.      By creating instance of Object directly (using new keyword)

3.      By using an object constructor (using new keyword)

1.  Javascript object by Object Literal:

Syntax of creating object using object literal:

Obj_name={property1:value1, property2:value2,property3:value3,…..}

Example:

<script>

        student = { name: "ankit", age: 22, class: 10 }

        document.write(student.name+" "+student.age+" "+ student.class)

</script>

2.  By creating Instance of object:

Syntax of creating object directly:

var obj_name= new Object();  

We use new keyword to create object.

Example:

<script>

        var student = new object();

         student.name= "ankit";

          student.age= 22;

          student.class= 10;

        document.write(student.name+" "+student.age+" "+ student.class)

    </script>

3.  Using Object Constructor:

We create a function with arguments. Each argument value can be assigned in current object by using “this operator”.

“this operator” refers to current object.

Example:

<script>

        function students(name, age, classs){

         this.name=name;

         this.age=age;

          this.class=classs;

          }

          student=new students("Ankit", 22,10)

        document.write(student.name+" "+student.age+" "+ student.class)

    </script>