Object-oriented JavaScript (3): private and public members

For Javascript in small projects, you only need to write a few functions. However, in large projects, especially in developing websites that require good user experience, such as SNS, a large amount of javascrpt will be used. Sometimes the Javascript workload is better than C #, at this time, writing a bunch of functions will become messy, messy, and even name conflicts, making management and maintenance troublesome. In this case, we need to use the object-oriented idea to develop JavaScript. Let's do this:

This section describes the private and public members of JavaScript. Although JavaScript does not have private and public keywords, it is still the same sentence-as developers, we need to have an object-oriented idea!

In fact, it is very simple. I have read the followingCodeAnd comments are clear to you!

 

// A declarative class is a method. In JavaScript, namespaces, classes, and members... all objects are objects.
Myclass = Function (){
VaR _ This = This ;

//Private variable
VaRAA="11";

//Public Variables
This. Bb="22";

//Private Method
FunctionFun1 (){
Alert (AA );
Alert (_ this. bb );
}

//Private Method
VaRFun2=Function(){
Alert (AA );
Alert (_ this. bb );
}

//Public Method
This. Fun3=Function(){
Alert (AA );
Alert (_ this. bb );
}
}

// The test is as follows:
VaR MC = New Myclass ();
MC. AA = " AA " ; // Error

MC. bb = " Bb " ; // Correct

MC. fun1 (); // Error

MC. fun2 (); // Error

MC. fun3 (); // Correct

In a word: Inside the class

UseVaRThe variables or methods declared by the keyword are private;

UseFunctionThe keyword declaration method is private;

UseThisThe variables or methods declared by the keyword are public.

 

All of the above are for instance classes, and static classes are simpler. Javascript static classes are actually a JSON object, so all its members are public, they are all externally visible!

 
Address: http://www.cnblogs.com/xumingxiang/archive/2010/04/30/1725364.html

Author: Xu mingxiang
Source: http://www.cnblogs.com/xumingxiang
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