JavaScript

Each function is created with a prototype attribute by default, which contains a constructor attribute and a hidden property _ proto _ pointing to the Object __. The value of the constructor attribute is the object of the function. If you add new to

In extjs grid, click the row and cell to obtain the row or cell content (data)Js CodeCopy codeThe Code is as follows:Grid. addListener ('cellclick', cellclick );Function cellclick (grid, rowIndex, columnIndex, e ){Var record = grid. getStore ().

When the client stores data, we generally use cookies (non-sensitive data). However, as the client becomes increasingly rich, the amount of cookies that can be stored (up to 4 k per domain) is small.LocalStorage is available in HTML5, but IE8-is

Both formats are supported.First:Copy codeThe Code is as follows: Second:Copy codeThe Code is as follows: click here to download the image

Copy codeThe Code is as follows:$. Ajax ({DataType: 'json', type: 'post', url: 'http: // localhost/test. do ', data: {id: 1, type: 'item'}, success: function (data ){}}); Problem: When the background action program is submitted, the type obtained is

waterfall stream and back-to-top effect I like TRY △ back to the top [Ctrl + A select all Note: If you need to introduce external Js, You need to refresh it to execute]

Copy codeThe Code is as follows:// Remove the leading space (left space) of the string)Function LTrim (str ){Var I;For (I = 0; I If (str. charAt (I )! = "") Break;}Str = str. substring (I, str. length );Return str;}// Remove the trailing space

Function Overview:There are multiple chart styles to choose fromYou can customize the date axis.Rotation Axis text can be setAutomatically calculate the trend lineToolbar tips and highlighted data pointsDefault optimal settings, very easy to useThe

Mouse events When you move the mouse over the target element, mouseover is triggered first.Then, if the cursor continues to move on the element, mousemove will be triggered continuously.If you press the device (left click, right click, scroll wheel .

The function is assembled by analyzing the document. cookie string.Review the operations on cookies in javascript: You can use document. cookie = "userId = 111"; to add a cookie.The full version can be used:Document. cookie = "userId = 111; domain =

Method 1: This is a method found online. It can be used. But to be honest, I don't quite understand this method... Well written and complex. What is the difference between this and setTimeout?Copy codeThe Code is as follows:Function Pause (obj,

1. statements and expressionsExpressions in JavaScript are different from statements. an expression generates a value, which can be placed wherever a value is needed, for example, as a function call parameter. each line of code below is an

Copy codeThe Code is as follows:Function setPage (opt ){If (! Opt. pageDivId | opt. allPageNum Var allPageNum = opt. allPageNum; // the total number of pages.Var showPageNum = opt. showPageNum; // Number of displayed pagesVar curpageNum = opt.

There are two cross-origin javascript scenarios:1. subdomains based on the same parent domain, such as a.c.com and B .c.com2. Based on different parent domains, such as www.a.com and www. B .com3. different ports, such as www.a.com: 8080 and

JQuery plugin type:1. jQuery method: Most jQuery plug-ins use this type of plug-ins. Because these plug-ins encapsulate object methods, they operate when the jQuery selector obtains jQuery objects to take advantage of jQuery's powerful selector.2.

Obtain selectLet's take a look at the following code:Copy codeThe Code is as follows:$ ("# Select_id"). change (function () {// code...}); // adds an event for Select, which is triggered when one of the selected events is selectedVar checkText = $ ("

Copy codeThe Code is as follows:/*** Value exchange operation* Array to which arr is operated* I index value of the operated Element* J Distance between the two elements operated*/Function refer (arr, I, j ){Var change = (arr [I]-arr [I-j]) If

When you want to display multiple content fragments in a limited page space, Accordion is very useful, it helps you switch between multiple content fragments in a user-friendly manner. With the popular jQuery framework, exquisite accordion effects

There are also many JS dynamic loading frameworks, such as In. js. But this is not the way I want to write it. Let me talk about it.Let's start with a piece of java code.Copy codeThe Code is as follows:Import Biz. User;User u = new User ();U. show ()

In the previous article on javascript dynamic loading, we mentioned using the synchronous loading policy to implement this method, as shown in figureCopy codeThe Code is as follows:Using ("jquery ");Using ("User ");$ ("# ID"). click (function (){Var