JavaScript

Do you know how many methods in JavaScript are available for asynchronous processing? SetTimeout (), SetInterval () is the most commonly used two. The XMLHttpRequest object, when the AJAX request is made. PostMessage () When cross-domain operations

JavaScript Window-Browser object modelThe browser object Model (BOM) gives JavaScript the ability to "talk" to the browser.Browser object Model (BOM)There is no formal standard for the browser object model (Browser object models). Because modern

There are two ways to declare a function in JavaScript: function declaration and function expression.The difference is as follows:1). A function that is defined by a method declared by a function, the function name is required, and the function name

JavaScript implements the contains function of a string/ ** String: Raw string* Substr: Sub-string* Isignorecase: Ignore case* /function contains (string, substr, Isignorecase){if (isignorecase){string = String.tolowercase ();substr =

JavaScript deletes an HTML element node code instance:This section describes how to use native JavaScript implementations to delete a specified HTML element. The code example is as follows:DOCTYPE HTML>HTML>Head>MetaCharSet= "Utf-8">Metaname=

I. Document Object modelDOM Document Object model, which provides an excuse to access and dynamically modify documents, with the specification of DOM specifications, supported by mainstream browsers. The DOM consists of 3 parts, namely the Coredom,

First, when the picture is loaded (why write onload ??? )1. Alert pop-up value before the image appears var img = new Image (); Alert (111); IMG.SRC = "Images/1.jpg"; Document.body.appendChild (IMG);　　2, first appear the picture and

------------------------------the prototype chain method (prototype) inherits all the methods of the parent class, and the call method is the clone this invocation method---------------------function Saycolor (Sprefix, Ssuffix) {Alert (Sprefix +

is a fool's title, in fact, this book spent a lot of content to explain the basic syntax of JS, Bom,dom, Events, Ajax (this and many JS book the same). The final chapter is programming patterns and design patterns.I don't think it has much to do

1. Object.create1>. Definition: Create an object that can specify a prototype object and which may contain optional custom attributes;2> object.create (proto [, properties]); Optional, to configure the properties of the new object;1. Proto: To

Two JavaScript basic syntaxA JavaScript Data types*****************************************************************Different programming languages tend to have different data classifications, unlike object-oriented languages such as C and Java,

JS is a prototype-based object-oriented language, compared with the traditional object-oriented such as java,c#, it has its own unique implementation in object creation and inheritance, this paper mainly describes the object creation and inheritance

1, this function is only applicable to the need to automatically fill or narrow the page to the visible area, and only a single subject to change the height of the demand.varResetcontrol =function(ptask) {var_task = Ptask | |[], _islock=false,

Abstract Factory mode Description1. Factory method Mode problem: In the Factory method mode, the creation of the class is required through the factory class, if you want to extend the program, you must modify the factory class, which violates the

var QuestionID = []; var answeridvalue = [];////javascript Array Extended indexOf () methodArray.prototype.indexOf = function (e) {for (var i = 0, j; j = This[i]; i++) {if (J.indexof (e)! =-1) {return i;}}return-1;}if (Answeridvalue.length Alert

Two-way Data Binding --- learning the basic principles of AngularJS Angular JS (Angular. JS) is a set of frameworks, templates, and data binding and rich UI components used to develop web pages. It supports the entire development process and

Use of the fs. close method in node. js, node. jsfs. close Method description: Close the file asynchronously. Syntax: Copy codeThe Code is as follows:Fs. close (fd, [callback (err)]) Because this method belongs to the fs module, we need to introduce

Description of the fs. rmdir method in node. js, node. jsfs. rmdir Method description: Delete the file directory asynchronously. Syntax: Copy codeThe Code is as follows:Fs. rmdir (path, [callback (err)]) Because this method belongs to the fs

Description of the fs. fstat method in node. js, node. jsfs. fstat Method description: Obtain the file information based on the file descriptor. Syntax: Copy codeThe Code is as follows:Fs. fstat (fd, [callback (err, stats)]) Because this method

Jquery custom plug-in development tutorial 1. Global Function Extension A global function adds an independent function to the namespace of JQuery. You can use $. fucnName (param) or jQuery. funcName (param) to call the API. 1. Add a global function