JavaScript Object

JavaScript is an object-based(object-oriented) programming language. JavaScript object is an entity that has different properties. For instance, a student is an object the has object properties ( Name, Sex, Age, Department, ID, etc. are properties of object student).

Creating an object by object literal

We can create a JavaScript object by separating Object property and values by a colon(:).

Syntax

{codeBox}
objectname={property1:value1,property2:value2};
{codeBox}Example 1: Creating an object by using the above syntax.
<script>
   student={name:"Abebe",sex:"Male",age:26,dep:"IT",ID:"IT235/10"};
   document.write(student.ID+" "+student.name+" "+student.sex+" "+student.age+" "+student.dep);
</script>
{codeBox}Output
Creating an object by creating an instance of an object 
To create a JavaScript object by creating an instance of an object we use the new keyword. 
 Syntax
{codeBox}
let objectname= new object();
{codeBox}Example 2: Creating the JavaScript object by using the constructor.
<html>
    <body>
        <script>  
            function student(id,name,sex,dep){  
            this.id=id;  
            this.name=name;  
            this.sex=sex; 
            this.dep=dep; 
            }  
            s=new student(235,"Abebe","Male","IT");  
              
            document.write(s.id+" "+s.name+" "+s.sex+" "+s.dep);  
            </script>  
    </body>
</html>
{codeBox}Output