javascript inheritance example

one of the most popular inheritance methods in JavaScript. If you do not understand the prototype, follow my other articleArticle: Prototype. Let's take a look at the code. Here, I refer to a piece of code in "Return of the Javascript King: Function Point (dimension) { This. Dimension = dimension; This. test = function (){ Alert ("success "); } }

);}Function subtype (name,age) {Supertype.call (This,name); Inheritance PropertiesThis.age = age;}Subtype.prototype = new Supertype ();SubType.prototype.constructor = subtype;SubType.prototype.sayAge =function () {alert (this.age);}var Instance1 = new Subtype ("Nicholas", 29);Instance1.colors.push ("Black");alert (instance1.colors); "Red,blue,green,black"Instance1.sayname (); "Nicholas"Instance1.sayage (); 29 var instance2 = new Subtype ("Greg", 27);

Inheritance By manipulating a function'sPrototypeObject, we can implement multiple inheritance, allowing us to make a class built from the methods of multiple classes. promiscuous multiple inheritance can be difficult to implement and can potentially suffer from method name collisions. we cocould implement promiscuous multiple

Javascript development notes: incomplete inheritance and incomplete javascript Javascript inheritance is very different from standard oop inheritance. Javascript

JavaScript, as an object-oriented language, can implement inheritance is necessary, but because there is no concept of the class (do not know whether it is rigorous, but in JS all classes are object simulation) so in JavaScript inheritance is also different from other object-oriented language. Perhaps a lot of beginner

Introduction: Learning the object-oriented language (Java, C + +) of children's shoes are aware of the concept of object-oriented, and certainly know the characteristics of object-oriented language: encapsulation, inheritance and polymorphism, but JavaScript is not object-oriented, but based on the object , these concepts cannot be applied directly to the object mechanism of

All object-oriented languages should have inherited features, and JavaScript is no exception. In the previous sections, we talked about the JavaScript object-oriented namespace, javascript object-oriented JavaScript classes, JavaScript object-oriented Private Members and pub

To implement inheritance in JavaScript is to implement three layers of meaning:1. Instances of subclasses can share methods of parent class;2, subclasses can override the parent class method or extend the new method;3, subclasses, and parent classes are "types" of child class instances.In JavaScript, inheritance is not

represents the most recently defined variable in the scope of the currently executing function, so the output is I ' m a private variable!. The last output I ' m a object variable! I don't think I'm going to tell you why, you know? 2 Inheritance and polymorphism 2.1 Starting from encapsulation As we said earlier, the purpose of encapsulation is to implement data hiding. But on a deeper level, there are several benefits to encapsulation in

. Therefore, we set the value of Cat.prototype to an instance of animal, as follows: Copy Code code as follows: Cat.prototype = new Animal (); In addition, we're going to tell the new cat.prototype that it's actually an example of cat: Copy Code code as follows: Cat.prototype.constructor = CAT//Let ' cat.prototype ' know that it is an instance of cat Although this is done primarily for hierarchical relat

The previous sections talk about JavaScript-oriented namespaces, JavaScript-oriented JavaScript classes, private members of JavaScript-oriented objects, and public members and JavaScript-oriented overloading, so you can look at the above and continue down See.There are sever

1, the object in JavaScript. JavaScript can be said to be an object-based programming language, why it is object-based rather than object-oriented, because JavaScript itself only implements encapsulation, and does not implement inheritance and polymorphism. Since he is based on the object, then we say the object in JS.

emp = new Employee (' [email protected] ');Since employee and person are not an inheritance relationship, EMP is currently an instance of the employee class, not an instance of the person class, so it cannot access the Name property of the person class and the SayHello () method.The instanceof operator can also be used to determine that an EMP is an instance of the employee class, not an instance of the person class.Implementing inheritanceLet us ask

have been learning JavaScript recently, intend to write some articles, calculate to do their own learning experience it, can be regarded as learning notes. No system of knowledge points, too basic do not want to write, mainly to write some of their own feel valuable places. Write the first article today. I think everyone has their own views on whether JavaScript is an object-oriented language or a languag

This article mainly introduces the javascript prototype chain and inheritance related information. If you need it, you can refer to the js prototype chain and inheritance, which is the focus of js, therefore, we will give a detailed explanation through the following three examples. First, define an object obj. The prototype of this object is obj. _ proto _, we