JavaScript

A previously written JS class that parses QueryString. You can get or set the value in QueryString, and noted down the value for convenience :) Example: The Code is as follows: Var qs = new QueryString (query );Qs. set ("ajaxids", ids)Qs. set

In my old article, I published a simple ajax operation class. We found that when creating an xmlhttp object in the old text, we need to create an object each time. We all know that the overhead of a new object is very large. If ajax technology is

Today we are studying window objects, but it is still a bit useful. Window object The window object indicates the entire browser window. The window can also be used to move or adjust the size of the browser it represents. I. window operations

There is a requirement in the project that requires the checkbox on the page to be re-initialized when the page is refreshed or rolled back, that is, it is in the unselected status and does not save the previous status. In the first day, this

The following are some very useful PHP class libraries. I believe they will certainly provide a better and faster way for your WEB development. Chart Library The following class library allows you to easily create complex charts and images. Of

JavaScript reference code for select-related operations. I. Insert option 1. DOM method Var oSelectYear = document. getElementById ("SelectYear "); Var op = document. createElement ("option "); Op. innerHTML = "2010 "; Op. value = "2010

Jquery can be used to operate HTML controls. For more information, see. Operation drop-down box [Select] 1. $ ("# seelctId"). append (" "+ Text +""); // Add the option to the drop-down list (ddlSayTo is the ID of the drop-down list) $ ("#

In the above article, I made an encapsulation of New using prototype principle, and then I thought, can I further encapsulate some basic features of object-oriented with prototype principle? For example, inheritance. Well, let's build it step by

Speaking of prototype, you have to first talk about the new process. Let's take a look at the following code: The Code is as follows:

In the five classes and objects of Javascript study notes, I simply mentioned using JSON to construct an object. The Code is as follows: The Code is as follows:

In Javascript, there are only five simple types: null, undefined, boolean, String, and Number. A complex type: object. The code type can only be function. Undefined: undefined. We can also call it nonexistent. typeof (undefined) = undefined.

Only with events can the page be truly "active. Extjs events are well encapsulated. The Ext. uitl. Observable class provides interfaces for event processing. The interface here means that the Observable actually acts as an abstract class. A large

In javascript, what is the essence of a new object? That is, when we build a class instance, what did we actually do? In the past, these things were clearly understood, but they could not be explained, nor did they go into depth. Today, when I read "

Both instanceof and typeof can be used to determine whether a variable is null or of any type. Typeof is used to obtain the type of a variable. Generally, typeof can only return the following results: number, boolean, string, function, object,

Call () in javaScript is a wonderful method, but it is also confusing. Let's take a look at the official explanation: Call Method See Applied to: Function objects Requirements Release 5.5 Call a method of one object to replace the current object

The Extjs component has two similar configuration items: applyTo and renderTo, which are used to specify the location where the extjs component is loaded. So what is the difference between them? I searched the internet and found two blog posts about

In general, it is similar to checking whether an iframe is loaded. The Code is as follows: Var iframe = document. createElement ("iframe ");Iframe. src = "http://www.jb51.net ";If (! /* @ Cc_on! @ */0) {// if not IEIframe. onload = function

Next, I will introduce the Form of Extjs in Extjs. In addition to form items similar to common htmlform, Extjs also has some functions that are richer and more practical. 1. Date selection box, DateFieldThe date selection box is widely used in daily

The creation, copying, restructuring, and modification of jQuery DOM operation method elements are blessed to learn about jquerydom operations. Classification of DOM operations: dom core, HTML-DOM and CSS-DOM 1. DOM Core DOM Core is not

First, I will test it through a simple example and discover the problem I mentioned, so that you can have an intuitive impression, and then I will look at my solution. In JavaScript, the execution sequence of mousedown, mouseup, and click is left to