JavaScript

Generally, gzip is rarely started for html, because the current html is dynamic and does not use browser cache. If gzip is enabled, compression is required for each request, it will consume server resources. It is better to start gzip for js and css

Directly create an object:Copy codeThe Code is as follows: var obj = {x: [1, 2], y: 23 };The Code is the same as below.Copy codeThe Code is as follows:Var obj = new Object ();Obj. x = new Array (1, 2 );Obj. y = 23; Test:Copy codeThe Code is as

What is a jQuery object?--- It is the object generated after DOM object is packaged using jQuery. JQuery objects are unique to jQuery and can be used in jQuery.For example:$ ("# Test" example .html () means to get the html code in the element with

Nested functions are allowed in javascript: nested functions [Ctrl + A select all Note: If you need to introduce external Js, You need to refresh it to execute]Remember this:Nesting is actually a kind of loop. There are two handles in the

Copy codeThe Code is as follows:/*-----------------------------------Web Application JavaScript Library2009.11 janchie------------------------------------*/// String native object extension left and right SpacesString. prototype. trim = function

It is best to start with an ID selector when selectingI think this is easy to understand, because JQuery uses document. the getElementByID method performs ID selection. This method is faster than all other DOM selection methods, so it is best to

I. Problems:Copy codeThe Code is as follows:Var xmlHttp;Function savecarttodata (){CreateXMLHttpRequest ();Var rndcode = new Date (). getTime ();Var CartUrl = "a. asp? Cache = "+ rndcodeXmlHttp. onreadystatechange = function (){.....}XmlHttp. open ("

Many elements in form are represented by form. element [x;The type of an element: the type of an element is expressed by element. type.With some of the above knowledge, let's solve the problem of getting focus from the first non-hidden element:First,

Array does not have the indexOf method. In this way, it is troublesome to search for the index of an element in an Array. For the convenience of calling, Array is extended through prototype. prototype. indexOf (), which makes it easier to use.

As a good Restfull Api, it is not only about the semantics, readability, power, and orthogonal of service URLs, but also about http Status codes. A good Http Status Code gives users a good response, for example, 200 indicates normal success, 201

Introduction:In ASP. in the Net page, the index of the textbox is 1 (or n), the index of the subsequent submit button is 2 (n + 1), and the cursor is in the textbox, after you press enter, the focus is automatically moved to the button that follows

JQuery gets the selected Text and Value of Select: Select one. Try again.Syntax explanation:Copy codeThe Code is as follows:. $ ("# Select_id"). change (function () {// code...}); // Add an event for Select, triggered when one of the Select events

Understand eval () function in js and write a function trim () to remove spaces between the left and right strings.Trim () is a reference to the jquery source code, you can rest assured to use.My understanding of eval () functions in js is not

Sometimes you may need to implement this effect: submit a form using ajax and clear the form after successfully submitting the form. The following code:Copy codeThe Code is as follows: submit After clicking submit, submit the content through

A) mouse events　　 Mouse events may be the most commonly used events on web pages. Because the mouse is the most commonly used navigation device, nine mouse events are defined for DOM3 events, respectively:Click: It is triggered when you click the

PrefaceWhen you are learning JavaScript, you often encounter code for self-execution of anonymous functions. Today we will focus on self-execution.Before learning about this in detail, let's talk about the "self-execution" method. This article is

Today, I have nothing to do in the company. I suddenly thought of writing the front-end framework of the shopping cart of the mall. Of course, I only have to add, delete, modify, and query the shopping cart here. Maybe it is not so complete, but the

Body:The solution is as follows: Here, BitmapCutter. Core is the server-side processing program of the image, and the class diagram is:   For more information, see the source code notes: Cutter is the cropping object used to store data submitted by

Copy codeThe Code is as follows:Function getConfig (config, args ){If (args ){For (var proto in args ){Config [proto] = args [proto];}}Return config;}Function getConnection (){Return new ActiveXObject ("ADODB. Connection ");}Function getRecordset (){

For example: Yu uses eq to obtain the color value of the first p Tag:$ ("P" ).eq(0).css ("color") // because eq (num) returns a jq object, therefore, you can use the jq method css to get the color value of the first p tag using get:$ ("P "). get (0