An object in JavaScript has properties and methods associated with it. For example, see the following object 'employee', it has properties Firstname, lastName and id. It has methods
a. setFirstName : sets the firstName of employee object
b. setLastName : sets the lastName of employee object
c. setId : sets the id of the employee object
d. getDetails : return string representation of employee object.
var employee = {
firstName: "no_name",
lastName: "no_name",
id: "-1",
setFirstName: function(firstName){
this.firstName = firstName;
},
setLastName: function(lastName){
this.lastName = lastName;
},
setId: function(id){
this.id = id;
},
getDetails: function(){
return "[firstName = " + this.firstName + ", lastName = " + this.lastName + ", id = " + this.id + "]";
}
}
Note that I used this keyword inside the methods, When a function is called from the object, this becomes a reference to the current object. By using this, we can refer current object properties.
object.html
"text/javascript">
var employee = {
firstName: "no_name",
lastName: "no_name",
id: "-1",
setFirstName: function(firstName) {
this.firstName = firstName;
},
setLastName: function(lastName) {
this.lastName = lastName;
},
setId: function(id) {
this.id = id;
},
getDetails: function() {
return "[firstName = " + this.firstName + ", lastName = " + this.lastName + ", id = " + this.id + "]";
}
}
employee.setFirstName("Hari Krishna");
employee.setLastName("Gurram");
employee.setId(1);
document.write(employee.getDetails());
Load above html in browser, you can able to see following text.
[firstName = Hari Krishna, lastName = Gurram, id = 1]
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