JavaScript methods for defining classes and objects_javascript tips

The examples in this article describe how JavaScript defines classes and objects. Share it with everyone for your reference. The specific method is as follows:

In JS, there are many different ways to write classes and objects. Since I am not very familiar with JS, I write based on my understanding. If any friend finds something wrong, please tell me and we can learn together.
There are two ways to define a class in JS (I only know these two):

1. How to define functions:
Definition:

Copy code The code is as follows:

function classA(a)
{
This.aaa=a; //Add an attribute
This.methodA=function(ppp) //Add a method
{
alert(ppp);
}
}
classA.prototype.color = "red"; //Use the prototype method to add the attributes of the object. This method is also applicable to instances (objects) of the class
classA.prototype.tellColor = function() //Method to add objects using prototype method. This method also applies to instances (objects) of classes
{
         return "color of " this.name " is " this.color;
}

How to use:

Copy code The code is as follows:

var oClassA=new classA('This is a class example!') ; //Instantiation class
var temp=oClassA.aaa; //Use attribute aaa
oClassA.methodA(temp); //Use method methodA

2. How to instantiate the Object class first
Definition:

Copy code The code is as follows:

var oClassA=new Object(); //Instantiate the base class first Object
oClassA.aaa='This is a class example!'; //Add an attribute
oClassA.methodA=function(ppp) //Add a method
{
alert(ppp);
}
oclassA.prototype.color = "red"; //Use the prototype method to add attributes of the object
oclassA.prototype.tellColor = function() //Method to add objects using prototype method
{
         return "color of " this.name " is " this.color;
}

How to use:
You can use oClassA directly, such as:

Copy code The code is as follows:

var temp=oClassA.aaa; //Use attribute aaa
oClassA.methodA(temp); //Use method methodA

I hope this article will be helpful to everyone’s JavaScript programming design.