Creating JavaScript objects

Create a new instance person and add four attributes to it:

1 person=new  Object (); 2 person.firstname= "Bill"; 3 person.lastname= "Gates"; 4 person.age=56; 5 person.eyecolor= "Blue";

Person{firstname: "John", LastName: "Doe", Age:50,eyecolor: "Blue"};

1 function Person (Firstname,lastname,age,eyecolor) {2this. first=FirstName; 3 this. lastname=LastName; 4 this. age= age; 5 this. eyecolor=eyecol

After you create a JavaScript object, you can create an instance of the object:

1 var New person ("Bill", "Gates", "a", "Blue"); 2 var mymother=New person ("Steve", "Jobs", "green");

Add a method to a JavaScript object

1 functionPerson (Firstname,lastname,age,eyecolor) {2  This. firstname=FirstName;3  This. lastname=LastName;4  This. age=Age ;5  This. eyecolor=Eyecolor;6 7  This. changename=ChangeName;8 functionChangeName (name) {9  This. lastname=name;Ten } One}

JavaScript class

JavaScript classes are object-oriented languages, but JavaScript does not use classes

In JavaScript, classes are not created and objects are not created through classes

JavaScript is based on prototype (prototypes) instead of class-based

JavaScript for: In loop

For...in iterates through each property in the object

1 var person=={fname: "Bill", lname: "Gates", Age "" "; 2 3 For (x in person) 4 {5txt=txt+person[x]; 6 }7 document.getElementById ("Demo"). Innerhtml=txt;

The output will be:

Billgates56

Creating JavaScript objects