JavaScript

JavaScript Introduction: JavaScript is a scripting language that belongs to the web! JavaScript is used by millions of of pages to improve design, validate forms, detect browsers, create cookies, and apply more. JavaScript is the most popular

JavaScript is powerful, but a problem is that it can not contain other JS files, and other non-scripting languages are basically have this function, have to feel a little regret. Shang, increasingly found that not dynamic import files will

Note: Haven't written for a long time, today I wrote a copy of the article in the company intranet, out of the show, just turned to web development, so began to learn javascript! Before introducing namespaces, a problem for developers is how to

Although JavaScript is a weakly typed language, it also has several data types of its own, namely number, String, Boolean, Object, udefined, and Null. Where object belongs to a complex data type, object is made up of unordered key-value pairs. The

JavaScript is a prototype based programming language, which differs greatly from our usual class based programming, and I enumerate the important points as follows: 1. The function is a class object, which means that the function has the same

Very simply, "add" two strings with a "+": var longstring = "One Piece" + "plus one more piece."; To accumulate more than one string as a string, you can also use the "+ =" Operator: var result = ""; result =

Some WEB sites store information in small text files on your hard disk, which are called cookies. "--msie help. In general, cookies are CGI or similar, created in a way that is more than HTML advanced files, programs, and so on, but JavaScript also

1, create the node. CreateElement (): var a = document.createelement ("P"); It creates an element node, so NodeType equals 1. A.nodename will return p; Note that the new element node created by the createelement () method is not automatically added

Speaking directly from the method: 1, delete the node. RemoveChild (): a b c If you do not know what the parent node of the node you want to delete is? You can use the ParentNode property. Like what: a b c 2, replace the node.

String.Replace () Introduction Grammar: Copy Code code as follows: String.Replace (RegExp, replacement) RegExp: The regular expression for which you want to perform the substitution operation. If a string is passed in, it is

We look at: oele= DOCUMENT.ALL.AAA//There is a AAA object here, but we do not know how long it is now, so there is no way to operate on it. Therefore, we have to do the process of judging length first. if (oele.length) {}else{}; In both cases, the

Initial Contact: After the initial exposure to JavaScript injection vulnerabilities, if you do not carefully analyze the mechanism of this vulnerability and extract a pattern of its occurrence, you will not be able to quickly discover all the

Javascript Implementation Magnifier Effect When we do the task today, there is a task is to achieve the electronic business site commonly used Magnifier effect, similar to such a magnifying glass effect, before and did not do this magnifying glass

First, the principle analysis 　　1.1 How to let the div element move up? The essence of the movement is to change the position of the div, that is, to change its left and top values; 　2.2 How does the DIV element move when it is on the specified

These two days with virtual machine installation system, ready to use virtual machine to separate development environment and database, the idea is as follows: 1. Development environment for host 2.Guest is a database server, each server is a

Author: Jegg At the end of the year, many companies are busy with the annual meeting, there will be some lottery activities, the following program is written in JavaScript with a simple lottery system to share with you. This code borrows some of the

Objective: Recently, the company's app to speed up the development of the efficiency of selected part of the use of H5 development, from the current market for most of the app, roughly divided into native app, Web app, Hybrid app three ways,

I like the strategy design pattern. I try to use it as much as I can. In essence, the strategy model uses delegates to decouple the algorithm classes that use them. There are several advantages to doing so. He can prevent large conditional

As you may have noticed, more and more Web applications have become more complex in recent times, with the focus shifting slowly from the server to the client. Is this a normal trend? I do not know. The discussion of support and opponents is like

This method returns the square root of a number. If the value of the number is negative, the root is returned to Nan.Grammar MATH.SQRT (x); The following are the details of the parameters: X: A number return value: