JavaScript defines methods for classes and objects

This article illustrates how JavaScript defines classes and objects. Share with you for your reference. Specific methods are as follows:

In JS, classes and objects have a variety of different ways of writing, because I am not familiar with JS, so I understand to write, if a friend found wrong, please tell, learn together.
JS defines a class in two ways (I only know these two ways) :

1. How to define functions:
Definition:

function classA(a)

{

     this.aaa=a;  //Add a property 

     this.methodA=function(ppp)  //Add a method 

     {

         alert(ppp);

      }

}

classA.prototype.color = "red";  //Add the properties of the object with the prototype method, which also applies to instances of the class 

classA.prototype.tellColor = function() //Method to add an object with the prototype method, which also applies to instances of the class 

{

      return "color of "+this.name+" is "+this.color;

}

Usage:

var oClassA=new classA('This is a class example!');  //Instantiate class 

var temp=oClassA.aaa;  //Use the attribute aaa

oClassA.methodA(temp);  // Method of use methodA

 
2. How to instantiate the Object class first
Definition:

var oClassA=new Object();    //The base class Object
 is instantiated
oClassA.aaa='This is a class example!';   //Add a property 

oClassA.methodA=function(ppp)  //Add a method 

{

    alert(ppp);

} 

oclassA.prototype.color = "red";  //Use the prototype method to add the properties of the object 

oclassA.prototype.tellColor = function() //Method to add an object using the prototype method 

{

      return "color of "+this.name+" is "+this.color;

}

 
Usage:
You can use oClassA directly, for example:

var temp=oClassA.aaa;  //Use the attribute aaa

oClassA.methodA(temp);  // Method of use methodA