JavaScript

In development, using some JavaScript frameworks, such as Jquery, Ext-js, Jquery-ui, Easyui, and so on, will often see prototype in some open source code. So what exactly is prototype? What are the applications in OO front-end development? What

JS to determine the version and browser typedocument.write ("os:" +window.navigator.platform);This is useless for 64, so I can barely use it.JavaScript determines browser type and 32-bit 64-bit

The two methods seem to have something to do with the name, but the difference between them is quite large in JavaScript.foreach () is used for the operation of an array, which executes the established function for each element in an array (not

The author of Parctical Common Lisp has said that if you need a pattern, there must be something wrong. The problem he says is that because of the innate flaws of language, he has to seek and summarize a common solution.Whether it is a weak or

Reprinted from Nanyi: http://www.ruanyifeng.com/blog/2009/08/learning_javascript_closures.htmlLearn JavaScript closures (Closure) Ruan Yi Fengclosures (closure) are a difficult and unique feature of the JavaScript language, and many advanced

 Javascript:dom programming1. Nodes and their types1) Element node2) attribute node: An attribute of an element, typically, an action attribute node reads and writes a property value directly through the "element node. Property name" method.3)

JavaScript can assign values to variables at any time (numbers, strings, and so on), but what happens if I add two variables, one is a number and the other is a string?JavaScript is smart and it will try to convert the type according to your needs.

Closures (closure) are a difficult and unique feature of the JavaScript language, and many advanced applications rely on closures.Here is my study note, which should be useful for JavaScript beginners.The scope of a variableTo understand closures,

Easily create nodejs servers (10): Process POST requests, nodejspost So far, our servers have no practical use. Next we will start to implement some practical and useful functions. What we need to do is: select a file, upload the file, and view the

Description of the fs. mkdir method in node. js, node. jsfs. mkdir Method description: Create a file directory asynchronously. If the directory already exists, an exception is thrown. Syntax: Copy codeThe Code is as follows:Fs. mkdir (path, [mode], [

Description of the fs. exists method in node. js, node. jsfs. exists Method description: Test whether a file in a path exists. The callback function contains an exists parameter. If the value is true, the object exists. Otherwise, the value is

Description of the fs. fchown method in node. js, node. jsfs. fchown Method description: Change the File Ownership (file descriptor ). Syntax: Copy codeThe Code is as follows:Fs. fchown (fd, uid, gid, [callback (err)]) Because this method belongs to

Javascript uses switch case to dynamically change the hyperlink text and address. switchcase The code is very simple. I will not talk nonsense here. Let's look at the source code directly. Copy codeThe Code is as follows: dynamically change the

Use of fs. readFileSync in node. js, fs. readfilesync Method description: Synchronous version of fs. readFile (). Syntax: Copy codeThe Code is as follows:Fs. readFileSync (filename, [encoding]) Because this method belongs to the fs module, we

Use socket. io in node. js to create a namespace. If developers want to completely control the sending of messages and events in a specific application, they only need to use a default "/" namespace. however, if developers need to provide

Description of the buffer. Buffer. isBuffer method in node. js, node. jsbuffer Method description: Checks whether the target is a buffer object. Returns true or false. Syntax: Copy codeThe Code is as follows:Buffer. isBuffer (obj) Receiving

The http. response. end method in node. js is described in node. jshttp. get. Method description: End the response and tell the client that all messages have been sent. When all the content to be returned is sent, the function must be called

[Design mode] javascript builder ModeBuilder mode description 1. separates the construction of a complex object from its representation so that the same creation process can have different representations. This is called the builder mode. 2.

Javascript Keyboard Events Zookeeper Keyboard Events include onkeydown, onkeypress, and onkeyup events. Event Initialization Function keyDown () {} document. onkeydown = keyDown; // The KeyDown () function is called when any key on the

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