JavaScript

Javascript provides a Regexp object to perform operations and functions on regular expressions. Each regular expression pattern corresponds to a Regexp instance. You can create an instance of the Regexp object in two ways. Use Regexp's explicit

By Justin Silverton The following are 5 JavaScript apps that I thought wocould never be possible. They are all written using the canvas HTML element. The canvas element is a third party extension to the that allows for dynamic rendering of

Original article: Understanding JavaScript closures   To become advanced JavascriptProgramYou must understand the closure. This document describes the internal working mechanism of closures in conjunction with The ECMA 262 specification, it

Effect Demo: Http://www.never-online.net/tutorial/js/upload/ Javascript & DHTML instance programming (Tutorial) (iii), elementary example-upload a file control instance In the previous chapter, I basically talked about all the basic knowledge to be

Publish an efficient JavaScript analysis and compression tool JavaScript analyser A script compression example is provided to show the JSA syntax compression and optimization functions. CopyCode The Code is as follows: Try { // Xxxx (); } Catch

For those who write Javascript into the Web Editor, obtaining the cursor position in textarea is a very important issue. Many people are often at a loss and cannot find a good solution. Yesterday I found a piece of JavaScript on the Internet Code I

// Text box name for date = "indate" Function check1 (form) { For (I = 0; I { If (Form. elements [I]. value = "") { Alert ("complete! ") Form. elements [I]. Focus (); Return; } If (Form. elements [I]. Name = "indate "){VaR date = form. elements [

Before reading this article, read offsetleft, offsettop, offsetwidth, and offsetheight attributes in the Javascript Drag and Drop Series article 2. Article To clarify the context. Okay. Let's get started. Attributes/methods with the same model 1

The try-catch method was used in the past. In the catch statement, we will receive an error object (we can also throw a custom exception object ). The error object in Firefox has the following attributes: Message -- error messageFilename --

Variables in Javascript also support conversion of free types into applicable (or required) content for ease of use. Weak JavaScript does not followProgramFrom the actual variable type to the required data type conversion, for example, a very

Someone asked a js question: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->var i = 0.07;var r = i*100;alert(r); Why is the result 7.0000000000000001? After checking the information, we know that

In some complex pages, JavaScript is often used to process the dynamic effects of some DOM elements. In this case, we often use the calculation of the position and size of some elements. The browser compatibility issue is also an important part, to

JSbooks has collected 32 excellent free JavaScript e-books, which are divided into three analogy: Elementary, intermediate, and advanced. You can download them based on your own needs. What a real success! Remember to add to favorites and share them

Introduction In this article, we will discuss more details directly related to the execution context. The topic of the discussion is the this keyword. Practice has proved that this topic is difficult. It is often difficult to determine the value of

In general, the interview process has gained a lot. The main reason is to identify the gap between yourself and the narrow knowledge. It is necessary to crack down on self-confidence. Here is a comprehensive summary about the de-duplication of

It is worth mentioning that the current Node sought after by Web developers. javaScript allows JavaScript to run in more environments, even on the server side of the website, so that this language has attracted attention again. Today, I will share

Similar articles have not been posted before.Difference between JavaScript null and undefined JavaScript Undefined, difference between the Null type and the NaN Value Let's talk about undefined:The variables in Javascript are of a weak type (I don't

First: view-source method View-source is a protocol that is basically supported by every browser in the early stage. But I don't know why. IE no longer supports this protocol since IE6 Beta2. This method can only be used in FireFox now! Usage:

Add data: Data display: ClassModel. js source code :: Copy codeThe Code is as follows: ClassModel = { Create: function () { Return function () { This. construct. apply (this, arguments ); } } } Extend = function (desc, src) { For (var c in

The condition declaration in JavaScript is used to complete the action under different conditions. Condition Statement When writing code, you often need to perform different behaviors according to different conditions. You can use the condition