How to Use prototype in JavaScript to implement inheritance

Prototype JavascriptWhat is prototype in? Kingsoft is just getting to know the prototype.

In msdn, prototype is interpreted as a reference to the object type prototype.

This passage is a very TMD abstraction, so confusing.

I saw it later.JavascriptAfter an authoritative guide, I probably understood the truth.

In the book, all objects have a prototype, which references the object. Although the prototype object is empty during initialization, any attributes you define in the prototype object will be inherited by all objects created by the constructor.

JS inheritance and classes have always been a strange thing. Here is an example to illustrate.

Rabbits are inherited from rodents. Other languages only need to inherit directly, but JS is different. js must declare an instance of a rodent before inheriting the rabbit class.

For example:
<SCRIPT>
Function cls1 ()
{
This. A = '000000 ';
}
Function cls2 (){}
Cls2.prototype = new cls1 ();
VaR o = new cls2 ();
Alert (O. );
</SCRIPT>

Of course, you may see this type of code in some advanced code.
<SCRIPT>
VaR o = {A: 123}
Function cls2 (){}
Cls2.prototype = O;
VaR x = new cls2 ();
Alert (X. );
</SCRIPT>
In fact, the same is true. O is a new object (); this method is simplified.

Provide additional information based on feedback.

However, any attribute you define in it will be inherited by all objects created by the constructor.

Understanding of this sentence
<SCRIPT>
Function cls1 (){}
Cls1.prototype. fun1 = function () {alert (123 );}
VaR o = new cls1 ();
O. fun1 ();
</SCRIPT>
In fact, there is no real prototype of cls1, but a fun1 attribute is added to the prototype of cls1.JavascriptRecorded