javascript typeof class name

JavaScript allows you to change the class or id of an element. After you change the style, the browser automatically updates the style of the element. Is className, not class Note that JavaScript uses className to access the class attribute, because

This article mainly introduces the implementation methods of classes and instances in JavaScript. it cleverly simulates the implementation process of classes and instances and has some reference value, for more information about the classes and implementation methods in JavaScript, see the examples in this article. Share it with you for your reference. The details are as follows:

Lifting object-oriented we can think of classes, objects, encapsulation, inheritance, polymorphism. In the JavaScript Advanced Program design (People's post and telecommunications press, Tianhua, Zhang Xin translation.) The English name is: Professional JavaScript for WEB developers) This book is described in more detail. Let's look at the various methods of defi

The JS class is automatically completed, and the user experience is better. Encapsulated into a class for ease of use. Site 1. encapsulated JS files //************************************** ****************** // Creation date: // OPERATOR: oloen // Content Description: Automatically complete the JS class // Usage: // Var auto = new autoComplete (Client ID ); // A

, email ){ If (Name ='' ) {Alert ( ' The user name cannot be blank. ' ); Return False ;} If (Password = '' ) {Alert ( ' The password cannot be blank. ' ); Return False ;} If (Email = '' ) {Alert ( ' Email cannot be blank ' ); Return False ;} Return True ;} We need to directly call where form verification is requiredChkformfunThis method does not need to know its implementa

know that the private variables of Javascript classes can be done by the closure mechanism. However, it is obviously difficult to form a valid closure when you convert using the new Class ({...}). How do you get around this problem? Javascript provides two methods: eval () and the ToString () method of the Function object, which is more common, and can be used t

The function is assembled by analyzing the document. cookie string. Review the operations on cookies in javascript: You can use document. cookie = "userId = 111"; to add a cookie. The full version can be used:Document. cookie = "userId = 111; domain = .google.com; path = \; secure = secure; expire =" + date. toGMTString (); You can set the cookie expiration time, domain name, and path. You only need to d

(function ). For example, JavaScript can only create objects without defining classes. Another function of the subsequent syntax is to define a Class f. If you use this in the function body, the variable after this is a member of the class. Not only can this define class members, but also has a Syntax: Function c (){

is as follows: VaR Singleton = New Singleton ();Alert (_ typeof _ (Singleton ));Alert (singleton. getvalue ()); VaR Singleton = New Singleton ();Alert (singleton. getvalue ());Singleton. setvalue ( 1000000 ); VaR Singleton = New Singleton ();Alert (singleton. getvalue ()); VaR Singleton = New Singleton ();Alert (singleton. getvalue ()); Return results: Singleton, 586606, 586606, 000000,000000. T

instance of the Function class ). Such multiple identities make JavaScript Functions very important. I. Entry-level JavaScript FunctionsSimilar to common languages, JavaScript Functions follow the principle of first sound and then use. A function name can only contain lette

= City; House.prototype.housename = "Peninsula Garden"; } House.prototype = new Createclass ("Cofco Real Estate", "two Period");//Get Ceateclass property, including prototype object, via new Prototype properties for print functions function Displayprototype (c) { for (var x in C.prototype) { document.write (x+ "} } Displayprototype (house);/output: Houseprice company Name version Delete an object that is not a prototype Dele

IntroductionIn many traditional languages (such as C/C ++/Java/C #), functions exist as second-class citizens. You can only declare a function with the keywords of the language and then call it, if you need to pass a function as a parameter to another function, or assign a value to a local variable, or return a value, you need to use the function pointer and proxy (delegate) and so on. In the JavaScript wor

: eval () and toString () of the function object. The former is more common, while the latter can be used to obtain the specific code of the function. Using these two methods, you can easily simulate the private variables of the class:Copy codeThe Code is as follows:Function Class (argu ){Var _ = argu ['private'] | | {};Eval ('var obj = '+ (argu ['initialize'] | function () {}). toString ());For (var p in argu ){If (p = 'initialize' | p = 'private ')C

1. Defining namespacesvar Namespace = new Object ();Namespace.register = function (path) {var arr = Path.split (".");var ns = "";for (Var i=0;iif (i>0) ns + = ".";NS + = Arr[i];Eval ("If" (typeof ("+ ns +") = = ' undefined ') "+ ns +" = new Object (); ");}}1. Define a goods class(function () {Register namespace Com.turingNamespace.register ("com.turing");Defining classesCom.turing.Goods = function () {This.

, [name, version]); // inherit the constructorThis. city = city;House. prototype. housename = "Peninsula Garden ";}House. prototype = new CreateClass ("Zhongliang property", "Phase II"); // obtain the CeateClass attribute through new, including the prototype object// Print the prototype attribute of the FunctionFunction displayPrototype (c){For (var x in c. prototype){Document. write (x +"");}}DisplayPrototype (House); // output: HousePrice Company

JavaScript library called Prototype.js in their own projects, developed by the MVC Web framework Ruby on Rails and use the JavaScript base library. This library is well-designed and has good reusability and cross-browser features, and using prototype.js can greatly simplify the development of client code. Prototype.js introduces the concept of a class that can b

This article mainly introduces the simple right-click menu class implemented by Javascript, and uses the JavaScript custom class to implement the right-click menu function, which has some reference value, for more information, see the examples in this article to describe the simple right-click menu

This article mainly introduces the simple right-click menu class implemented by Javascript, and uses the JavaScript custom class to implement the right-click menu function, which has some reference value, for more information, see the examples in this article to describe the simple right-click menu

Get the corresponding property name: [javascript] lt; prename quot; code quot; class quot; javascript quot; gt; for (attributeinobj) {alert (attribute) ;}get the value of the corresponding attribute: the common method is our habitual point; the other method is as follows: [limit crip Get the corresponding proper

This article mainly introduces the "class inheritance" of JavaScript design patterns. This article uses code examples to explain the implementation of class inheritance, if you need a friend, you can refer to the following. Before doing one thing, you must first understand the benefits of doing this thing. I believe that no one is willing to do things for no reas