JavaScript

Different types of basic data in javascript can be converted. Such conversion is rule-based and not random. In JavaScript, there are five basic types of data: string, number, boolean, null, and undefined. Among them, the first three types are

1. What is json?JavaScript Object Notation is a lightweight data exchange format. Easy to read and write. It is also easy to parse and generate machines. It is based on a subset of JavaScript Programming Language, Standard ECMA-262 3rd

I. Date objectOne object every day. Let's take a look at the Date object today. You must be familiar with the Date object. This special time effect should have been used in many places on the website. Let's recall the Date object today. Let's first

Now there are many JavaScript libraries, most of which meet your website's DOM-related operations. However, there is an urgent need to manage the code of a single application, which is why the new framework is generated. "The old saying goes: the

This article is based on Ext JS 4.2.1UI component BasicsLearning ExtJS is the use of learning components. ExtJS4 restructured the framework. The most important thing is to form a structure and hierarchical component system, which forms the Ext

Keyboard Events are used to process all users' keyboard hits, whether inside or outside the text input area. Keyboard Events have different scopes in different browsers. Generally, these keyboard events can be applied to elements such as Form, a tag,

Recently, I am not busy writing an outsourcing website. The main function of the website is the sale of art bidding and art derivatives. The project has been completed by about 80%, and now there are about lines of front-end code. I am mainly

The Real-World Ajax Seminar was held in Times Square in New York, United States on March 14. This is a tense and tiring day, particularly with the following speakers: "Father of Ajax"-Jesse James Garnett, speech: "The Elements of User Experience ")

QQ online customer service code on the right side of the webpage Copy codeThe Code is as follows:Function myEvent (obj, ev, fn ){If (obj. attachEvent ){Obj. attachEvent ('on' + ev, fn );} Else {Obj. addEventListener (ev, fn, false );};};Function

I. Source Code Composition1. It has 8000 lines of C ++ code and 2000 lines of javascript code.2. the built-in javascript in node. js includes the main program src/node. js and the Module Program lib/*. js.3. main libraries on which node. js depends:

1. Replacement of JS strings and use of the replace () method The replace (regexp, replacement) method has two parameters. The first parameter can be a plain text string or a RegExp object. For details, see the use of the RegExp object; the second

I have been engaged in web development for some days. I can hardly understand what cookies are, but I actually need to search for them (You know) on my own, and the results are despised... so I wrote a blog post as my study notes. The benefits of my

Dom:Attribute: Attribute$ ("P"). addClass (style type defined in css); add a style to an element$ ("Img"). attr ({src: "test.jpg", title: "test Image"}); add attributes/values to an element. The parameter is map.$ ("Input"). attr ({"checked",

Client scripts are generally on the frontend. Here we talk about (1) Calling the scripts defined by the frontend in the background (2) how to register the client script usage in the background when to use the server code to add the client script to

& Amp; nbsp; The favicon. ico icon on the website is a very simple problem, but it is often ignored. The favicon. ico icon not only promotes the website, but also makes the website more professional. This article briefly introduces 1. The favicon.

After discussing the theory, let's introduce how closure is implemented in ECMAScript. After discussing the theory, let's introduce how closure is implemented in ECMAScript. It is necessary to emphasize that ECMAScript only uses static (lexical)

The encoding format that the browser can correctly recognize. As long as the corresponding Content-Disposition is set according to this encoding, there should be no garbled Chinese file names. First, the Content-Disposition value can have the

In my recent work, I need to display statistical charts (based on the SSH architecture) on the Web front end. I have used JFreeChart and amchart to talk about my experiences. The biggest advantage of JFreeChart is that it can save JPG images on the

Now you can complete the deletion function. Currently, only one row can be selected for a Grid, that is, only one row can be deleted at a time, which is not convenient. Therefore, you need to set it to use the check box and allow multiple selections.

Introduction: Array. Array in JavaScript is a common type in JavaScript, and arrays in JavaScript are quite different from those in other languages. The data types stored in arrays in JavaScript are not necessarily the same, and the length of arrays