Object-Oriented Fundamentals

1. Object description

An object is a special type of data that is encapsulated by attributes and methods

Property refers to the value associated with the object: the name of the object. Property name

A method refers to the behavior that an object can perform or a function that can be accomplished: the object name. Method Name ()

Defining objects

Create an instance of an object

Create a template for an object

Using JSON

2. Create a Generic Object

To create a common object by using object objects

function Testobject () {varpersonobj=NewObject (); //Add PropertyPersonobj.name="John"; Personobj.age= -; //Add Methodpersonobj.say=NewFunction ("alert (' hello! ');"); //TestPersonobj.say (); alert (personobj.age);}

3. Creating templates for objects

Define constructors to create custom objects

Syntax: function objname (parameter 1, parameter 2,...) {}

function Person (n,a) {//defining the name and age properties     This. name=N;  This. age=A; //Definition Method ShowName     This. showname=function () {alert ("My Name is"+ This. Name);    }; //Definition Method Introduceself     This. introduceself =Introfunc ();} function Introfunc () {alert ( This. name+":"+ This. age);}

// Test Object function Test () {    var o1=New person ("Mary", );    alert (o1.age);    O1.showname ();    O1.introduceself ();         var o2=New person ("John",+);    alert (o2.age);    O2.showname ();    O2.introduceself ();}

4. JSON

JSON (JavaScript Object Notation) is a lightweight data interchange format

Define by using name/value pairs

The name needs to be caused by ""

Use between many pairs of definitions, separating

The name can be a property

The property value of the string type, which needs to be caused by the ""

var obj={    "name":"Jerry",     "Age":; // test Object alert (obj.name);

Object-Oriented Fundamentals