javascript inheritance example

The example in this article analyzes the usage of inheritance in JavaScript. Share to everyone for your reference. Specifically as follows: ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 The //define the person Class function person () {} Person.prototype.walk = function () {alert (' I am walking! '); Person.prototype.sayHello = fu

created for the example: This code creates a triangle with a base of 12, a height of 4, and a rectangle with a length of 22 and a width of 10. The number and area of each shape are then output, proving that the sides property is assigned correctly, and the Getarea () method returns the correct value. The area of the triangle should be 24, and the area of the rectangle should be 220. 4. How about using a dynamic prototyping method? The previous

Example The code is as follows Copy Code /*** Implementation subclass inherits the parent class, but does not produce redundant properties and methods* @returns {Function}*/Define (function () {return function (subtype, supertype) {var proto = new Object (supertype.prototype);Proto.constructor = subtype;Subtype.prototype = Proto;};});——————————————————————————Define (function () { function ostring (s){This.str = s;This.len

that you cannot share properties and methods. For example, in the constructor of a dog object, set the common property species of an instance object. The code is as follows Copy Code function DOG (name) {THIS.name = name;this.species = ' canine Division ';} Then, two instance objects are generated: The code is as follows Copy Code var Doga = new DOG (' hairy ');var dogb = new DOG ('

As an object-oriented language, then the inheritance of nature is a big feature, the following is a very simple code example, it demonstrates the rationale for inheritance, interested or just want to learn this aspect of friends can refer to, hope to be able to help the group. Inherited function Person (name,sex) { this.name=name; this.sex=sex; } Person.pr

Create a custom object with the prototype prototype person:functionPerson (name,sex) { This. Name =name; This. Sex =sex;} Person.prototype={getName:function(){return This. Name}, Getsex:function(){return This. Sex}}varLiu =NewPerson ("LCY", "female");//Create a blank object//Copy the attributes in Person.prototype to an empty object (internally implemented as a hidden link)//pass the object through the This keyword to the constructor and execute the constructor//assign this object to the obje

() {Console.log ("Hi");};return clone;}var person = {Name: "Nicholas",Friends: ["Shelby", "Court", "Van"]};var Anotherperson = Createanother (person);Anotherperson.sayhi (); What does not understand is why the sayhi defined here cannot be shared to person. And parasitic modular inheritance now seems to be called the most efficient way (-_-actually I don't understand) code is as follows copy code functi

number of edges of the object to the constructor of Polygon. Then, assign the base and height values to the appropriate attributes. After the prototype chain inheritance method is used, Triangle will overwrite the getArea () method and provide custom calculation for the Triangle Area. The last class is Rectangle, which also inherits Polygon. A rectangle has four sides. The area is calculated by length x width. The length and width are required for th

Object Creation： When a function object is created, the function object produced by the functions constructor runs code similar to this: Copy Code code as follows: This.prototype={constructor:this}; Suppose function f f when constructing an object in new form, the object's constructor is set to this F.prototype.constructor If the function modifies the prototype of the function before the object is created, it affects the Construtor property of the Created object Such as