JavaScript

Cookie is a small text file stored in the client (browser) record information to determine the identity of the user, can be used to track the user's current login status and the number of times users browse the page, record the user input text

Situation Onefunction AAA () { this. Say = "haha"; = "Own"; var New AAA (); Console.log (Obj.say); // "haha"console.log (obj.own); // undefined // "Own"Situation Twovarperson =function (){ This. pro= "QQQ"; This. Sayword =function (){

the principle of constant speed animation: position of the box itself + Step sizethe principle of easing animations : The position of the box itself + Step size ( changing )Encapsulation Code:1 function animate (obj,target) { /// first

Javascript---browser window viewable area sizeIn IE 9+,chrome, Firefox, Opera,safariThe internal height of the browser window window.innerheight　　The internal width of the browser window window.innerwindthJS scheme that is common in all

JavaScript is a prototype based programming language, and is very different from the CALSS based programming that we often contact. A function is a first class object, that is, the function has the same language status as the object.

  Analog Classfunction rectangle (width, height) {this.height = height;//  instance variable (public) This.getwidth = function () { return width; } //  instance variable (private) This.setWidth  = function (w) { width = w; }rectangle.instance_count++

See the object of this chapter today, the object of this chapter needs to understand the content is very much, and more obscure. See a method in the book, understand thoroughly, write down again review review, smoothed a thought./*===================

For developers who are familiar with class-based object-oriented languages (Java or C + +), the syntax for JavaScript is rather bizarre, because JavaScript is a dynamic language and it does not 类的概念 (ES6 adds the class keyword, but only the syntax

Document Problems with variable naming conflicts in JavaScript

Document Scope in JavaScript

inputtype= "text"ID= "D1"onblur= "Chknumber (this)"/>Scripttype= "Text/javascript"/> functionChknumber (eletext) {varvalue=Eletext.value; varLen=value.length; for(Vari=0; ILen;i++) { if(Value.charat (i)>"9"||Value.

First, online demoInterface drag-and-drop interactionIi. differences between Clientx (y), PageX (y), ScreenX (y), OffsetX (y) in the event objectAbout Clientx (y), PageX (y), ScreenX (y) I summarize as follows:ScreenX >clientx =

Document Three ways to construct a function in JavaScript

Description of the constructor 1.1 constructor is a template constructor, a function that is used primarily to initialize an object when it is created (that is, to assign an initial value to an object member variable) and is always used

Arrays Array declaring an array Working with Arraysmethod used : array name [ index value ]; the name of the function ();The index number starts at 0. 0 1 2 3 4 5 ...The length of the arrayarray name . length;Iterating through an arraythink of

Document Prototype objects in JavaScript

Why you can access properties or methods in a prototype through an object? Attribute Search principles:1The object itself is first searched for the attribute,If there is a direct return2If not,This will look in the constructor for theThisThe member

Document Exception handling cases in JavaScript

script> document.write ("ul>"); for (var i=0;i18;i++) { document.write ("li>"); document.write (' input type= ' checkbox ' value= ' + i + '/>888888888888888 '); document.write ("/li>"); } document.write ("/ul>")

Document JavaScript A scope case study