javascript class vs prototype

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The differences between the properties and methods defined by the JavaScript constructor class and the prototype prototype

1, the method written in the prototype than write in the constructor consumes less memory, because in the memory of a class prototype only one, the behavior written in the prototype can be shared by all instances, the instance will not be copied in the memory of the instance of a copyThe method that is written in the

"JavaScript" Class Inheritance (object impersonation) and prototype inheritance __ deep understanding of prototypes and prototype chains

There are many types and implementations of inheritance in JavaScript in many books, basically two kinds: class inheritance (object impersonation) and prototype inheritance.Class inheritance (Object impersonation): The method of defining its own properties inside a function, when the subclass inherits, using call or apply to implement the object impersonation, th

JavaScript walkthrough (8). Object Member, class member (prototype, non-prototype)

/* Class attributes and Object Attributes */Array. Info1 = "Info1"; // adds the class attribute Info1 to the Array.Array. prototype. Info2 = "Info2"; // adds the object attribute Info2 to the Array. Arr = [1, 2, 3];Alert (arr. Info1); // undefinedAlert (arr. Info2); // Info2 Alert (Array. Info1); // Info1 /* Class m

JavaScript walkthrough (8). Object Member, class member (prototype, non-prototype)

/* Class attributes, Object Attributes */Array. info1 quot; Info1 quot; // adds the class attribute Info1Array to the Array. prototype. info2 quot; Info2 quot; // Add the object attribute Info2arr [, 3] For Array; alert (arr. info1); // undefin... /* Class attributes and Object Attributes */Array. Info1 = "Info1";

Javascript walkthrough (8). Object Member, class member (prototype, non-prototype)

/* Class attributes, Object Attributes */array. info1 = "info1"; // Add the class attribute info1array for array. prototype. info2 = "info2"; // Add the object attribute info2arr = [1, 2, 3] For array; alert (ARR. info1); // undefinedalert (ARR. info2); // info2alert (array. info1); // info1/* class method, Object Meth

How JavaScript prototype works (and how to use it to implement class inheritance)

Original article: How JavaScript Prototype Really Works This is the second article in The JavaScript technology series. I plan to discuss in depth the most confusing JavaScript prototype object and how to use it to implement inheritance.In the previous article, we analyzed

JavaScript learning-class/prototype chain/class

What is the prototype chain??? The concept of C/c++/java class has been deep in my heart, and suddenly this is not suitable. What's the use?And see the back ES6 grammar, unexpectedly also joined the class?????What the hell? Isn't that a hit on your face?Maybe there's something useful in the back, but I haven't found it yet.A brief explanation of the

JavaScript uses constructor and prototype to simulate functions of class C _ javascript skills

This article describes how JavaScript simulates the functions of class C # using constructor and prototype. For more information, see. The Code is as follows: // ConstructorFunction person (name, age ){This. name = name;This. age = age;}// Define the person prototype. attributes in the

Javascript Learning (5) -- [basic review] prototype of class _ 2 _

The prototype of the javascript class. Here I would like to put it simply: javascript itself does not have strict Inheritance like java. We say that javascript inheritance, it is also similar to the object-oriented language, so although

JavaScript class-The difference between the construction method and the prototype method __java

http://www.link888.cn/index.php?load=readid=500 For JavaScript, the method is essentially a property. The construction method , like the construction property, is stored separately in each instance and is completely independent of each other. The prototype method , like the prototype property, is stored in the prototype

Implementation methods and differences of class-type inheritance and prototype inheritance in JavaScript

. Books.join (', ');}//Add an author SmithvarSmith =Clone (Author); Smith.name= ' Smith '; Smith.books= []; Smith.books.push (' //The author has written two booksConsole.log (Smith.getname (), Smith.getbooks ());//Smith //Add one more author JackyvarJacky =Clone (Author); Jacky.name= ' Jacky '; Jacky.books= []; Jacky.books.push (' ); Console.log (Jacky.getname (), Jacky.getbooks ()); //Jacky The difference between the class-type inheritance and the pr

JavaScript class and inheritance: prototype attribute

We have used prototype property simulation class and inheritance implementation in Chapter 1. The prototype attribute is essentially a JavaScript Object. Each function has a default prototype attribute. If this function is used to create a custom object, we call it a constru

Enter the javascript Hall from prototype_1.3.1-class preliminary study _ prototype

do is often incredible, and some functions can even be equivalent to the desktop program. Now we can start with a javascript development framework prototype_1.3.1 (prototype. I would like to introduce the advanced javascript applications first, but I am afraid that the level is not enough and that it is not organized. Therefore, combined with

JavaScript class and inherit prototype attribute _ js object-oriented

This article describes the prototype attribute in JavaScript. This attribute is an important basis for understanding JavaScript classes and inheritance. We have used prototype property simulation class and inheritance implementation in Chapter 1. The

Enter the javascript Hall from prototype_1.3.1-class preliminary study _ prototype

do is often incredible, and some functions can even be equivalent to the desktop program. Now we can start with a javascript development framework prototype_1.3.1 (prototype. I would like to introduce the advanced javascript applications first, but I am afraid that the level is not enough and that it is not organized. Therefore, combined with

Javascript class and inherit prototype attributes

We have used prototype property simulation class and inheritance implementation in Chapter 1. The prototype attribute is essentially a JavaScript Object. Each function has a default prototype attribute. If this function is used to create a custom object, we call it a constru

JavaScript class and inherit prototype attributes

We have used prototype property simulation class and inheritance implementation in Chapter 1. The prototype attribute is essentially a JavaScript Object. Each function has a default prototype attribute.If this function is used to create a custom object, we call it a construc

Javascript: Prototype pattern class inheritance

Prototype mode each function (not exactly a class, an object.) has a prototype property, which is a pointer to an object. Using the prototype object'sBenefitsIs that you can have all object instances share the properties and methods that it contains. 1. Prototype objects (1)

How to implement inheritance in JavaScript (listing 3 types in the previous chapter, we've explained that the best way to create a class is to define a property with a constructor and define the method with a prototype. )

. Because this hybrid uses the prototype chain, the instanceof operator can still run correctly.Yang ZhiwangLinks: https://www.zhihu.com/question/20289071/answer/14644278Source: KnowCopyright belongs to the author. Commercial reprint please contact the author for authorization, non-commercial reprint please specify the source.LZ to understand the existence of call and apply the reason, to remember a bit:In JavaScr

Javascript class inheritance and prototype inheritance

Javascript class inheritance To better understand the principle of class inheritance in Javascript, let's take a look at a simple example.// Super class The specific decomposition is as follows: In the constructor of the subclass, the role of person. Call (this); is to ca

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