"JavaScript" Analysis of how JavaScript objects add properties and methods

The most straightforward way to add properties and methods to a JavaScript class is to define properties and methods in the class. JavaScript is a weak language that can be added with prototype in addition to direct definitions.

Here are four ways to add properties and methods from outside to JavaScript, first defining a class

function MyClass () {}

1, adding a property using the class name

Myclass.prototype.myname= "Wu 01";

2, adding a method using the class name

myclass.prototype.myfunc=function() {alert ("Wu 02")}

You can also define a method before you call the method.

function myfun () {alert ("WU")}myclass.prototype.myfunc=myfun;

3, adding properties using object name

var myclass=New  MyClass (); Myclass.myname= "Wu 04";

4, adding a method using the object name

var myclass=New  MyClass (); Myclass.func=function() {}

You can also define a method before you call the method.

function myfun () {alert ("WU")}myclass=myfun;

"JavaScript" Analysis of how JavaScript objects add properties and methods