JavaScript

I am a supporter of TDD. I used to write back-end generations. I like to extract some important logic code and add Unit Test. However, when I recently came into contact with the front-end Unit Test, I couldn't help but think about it. By the way, we

Copy codeThe Code is as follows: Jquery's Tabs content rotation implementation code, several lines to deal with hot news news entertainment news enteriment Employment Situation jobs

After playing the portal page, the random Chart content is transformed according to the demo of extjs. One of the five projects is randomly selected for statistics. Each time you see the statistics items, it may be different. /*** @ Class Ext.

Before talking about the above concepts, we should first talk about the implicit parameter of the function in javascript: arguments Arguments This object represents the function being executed and the parameters of the function that calls

We know that the sort function is provided by default in js, but this function is arranged in ascending order according to the ascii code of the array content by default. What should we do if we want to sort the two-dimensional array?Recently, js

Click a box to pop up, but sometimes you don't want to operate it. You just want to click a blank space to hide the box. The following is a specific implementation:Most of the time, we have such a small function when doing front-end operations.

1. The reason for the fix is that the treeview control is used in an android project (a token was originally implemented through the native api of android .). Originally, there were many excellent tree controls in js plug-ins, such as the famous

[The following is an email sent to a colleague yesterday. To prevent leaks of trade secrets, the project name and variable name are hidden.] ========================================================== ================ Yesterday we found a bug in Nx

Jquery is an excellent Javascr into pt framework. $ is the declaration of the jquery library. It is very unstable (I often encounter it). It is a stable way to write jQuery. noConflict (); jQuery (document ). ready (function (){}); The advantage of

Have you ever encountered such a thing that you are particularly familiar with seeing an image on your website, as if you have seen it elsewhere? I bet you 've met it, and I know what images it is. The following 15 images are the most used in web

Remove spaces on the left and right of the string respectively.Copy codeThe Code is as follows:String. prototype. trim = function () {return this. replace (/^ \ s + | \ s + $/g ,"")}String. prototype. ltrim = function () {return this. replace (/^ \

The code is for reference only. If you force copy the code, modify the page id.Copy codeThe Code is as follows:// Query the database's Qualified DataFunction SelectAlterNativeVenues (field){Var xmlhttp;Var pid = document. getElementById

JQuery's Array Processing is very convenient and powerful. It encapsulates a lot of functions that native js arrays cannot match in one step. Let's take a look at the strength of the JQuery array.$. Each (array, [callback]) traverses $. each ()

An error occurred while parsing an HTML string. You may need to parse a file or HTML string from a user input, retrieve its content, verify its format, or modify it. What should I do? Jsonu helps you easily solve these problemsSolution Use

Str = "s" ++;Then Nan appears. Find it for a while.The collected data is judged as follows:1. Determine undefined:Copy codeThe Code is as follows: var tmp = undefined;If (typeof (tmp) = "undefined "){Alert ("undefined ");} Note: typeof returns a

Backbone. js provides a web development framework, binding key-value and processing m events through Models, and providing a rich set of APIS for enumeration through Collections, use Views to process events and interact with existing applications

This article mainly introduces the JavaScript Runtime Library attributes. For more information, seeDescription Language Elements in TextStream files, if the file pointer crosses the end of the line flag, True is returned; otherwise, False is

However, due to browser limitations, in many cases, we can only provide a link to allow users to click "open" and save it. See the following link:Copy codeThe Code is as follows: file. js When you click this link, the browser will open and display

The jquery plug-in imgAreaSelect can easily crop portraits, images, or areas without flash. An important feature of imgAreaSelect is to drag and drop the mouse to obtain the cropping coordinates, in fact, the real implementation of cropping is still

There are many ways to process arrays. splice () is the most powerful. It can be used to insert, delete, or replace array elements. Here is a one-to-one introduction! 1. Delete-used to delete an element. There are two parameters: the first parameter