JavaScript

JavaScript Advanced Programming (Second Edition) (Professional JavaScript for WEB developers, 2nd Edition)They are excellent JavaScript readings and are recommended for reading.The notes are divided into three parts. The first part of today is the

Preface: It is also an introductory article. There are several very important language features in JavaScript-objects, prototype inheritance, closures. Closures are a new language feature for programmers who use the traditional static language, C + +

Closures (closure) are a difficult and unique feature of the JavaScript language, and many advanced applications rely on closures.The scope of a variableTo understand closures, you must first understand the special variable scope of JavaScript.The

in the previous example, we created the object through the constructor and wanted the object to inherit objects from another constructor.we can also directly target an object to achieve the purpose of inheritance, using subordinate steps:1. Copy an

First, Preventdefault and stoppropagationevent. Preventdefault () and event. Stoppropagation () is not a method of jquery, it is the JS itself comes withevent. Introduction to Preventdefault () usageThis method notifies the Web browser not to

IE Edge mode results as follows: function ' s name is function hello () function helloworld001 () {World ();} function helloworld002 () {World (); } function helloworld003 () {World ();}JavaScript print function name and referenced function

One, the OnLoad event occurs conditionThe user enters the page and all elements of the page are loaded. If you add a JavaScript function at the initial position of the page, the DOM is incomplete because the document is not loaded, which can cause

One, the external is global, the internal is a local variable.Two, plus Var is a local variable (within the method), without var as a global variable (once used within the method)var golbe= "global"function Test () { var local= "local";

In the array operation often encounter the problem of removing duplicates, the following is a brief introduction to the method of array deduplication, and its implementation efficiencyMethod OneUse two loopsPrinciple: Take the current and the ratio

JavaScript is at the heart of Web development and is the core competency of a web developer. This course focuses on object-oriented JavaScript advanced techniques, which can be greatly improved by writing techniques for JavaScript design patterns

Offset bug in Javascript motion-line-by-line code analysis allows you to easily understand the principle of motionLet's take a look at how this bug was generated. The following Javascript code is used for testing to narrow the div. Javascript

Ie compatibility --- haslayout, ie --- haslayout To better understand css, especially css rendering in IE, haslayout is a concept that needs to be completely cleared. Most IE display errors are due to haslayout. What is haslayout? Haslayout is an

How to dynamically create a link label to the head in JavaScript, linkhead The example in this article describes how to dynamically create a link tag to the head using JavaScript. Share it with you for your reference. The specific analysis is as

Sails framework Learning Guide and sails framework Learning Guide Last week, by setting up a CMS system, we came into contact with the sails framework and learned some ORM concepts. This week, I started in-depth background data interaction and found

The entire process of making crawlers in NodeJS (continued) and the entire process of node. js Crawlers After the book is connected, we need to modify the program to capture 40 pages consecutively. That is to say, we need to output the title, Link,

Unicode and JavaScript (1) Last month, I shared a detailed description of the Unicode Character Set and the support of the JavaScript language. The following is the lecture for this sharing. 1. What is Unicode? Unicode comes from a very simple

Jquery html5 file Upload image display image I recently made a small example of how to display images when uploading user images. I found a lot of information on the Internet and could not do it. If so, I used jquery and html5 to implement it. Since

Description of the fs. chmod method in node. js, node. jsfs. chmod Method description: This method overwrites the read and write permissions of a file asynchronously. After the operation is complete, the callback only receives one parameter, and

Easy creation of nodejs server (9): non-blocking operations, nodejs Server We need to pass the response object (obtained from the server's callback function onRequest () to the request handler through the request route. Then, the handler can use the

Easy creation of nodejs servers (7): Implementation of blocking operations, nodejs servers Let's take a look at what is a blocking operation; I simulate a sleep () method to delay hello star from printing for 10 seconds. RequestHandlers. js Copy