JavaScript

Today I have studied how JS uses the setAttribute method to implement two style sheets on a page. The specific method is as follows:Step 1: Define an id in the element connecting to the style sheet, for exampleCopy codeThe Code is as follows: The id

SetTimeout ()Execute an expression or function at the specified time after loading;Run only once. It is used with window. clearTimeout.OnCopy codeThe Code is as follows:$ (Document). ready (function (){SetTimout (test (), 200 );Function test

Keywords: identifier, execution context, scope, scope chain, variable object, activity object theoretical knowledge It is important to understand how JavaScript manages scopes and scopes. Because the number of variable objects to be searched in the

Preface We cannot face the fact that many programmers do not plan their JS Code. We often write code, run, and submit quickly. However, when we continue to develop variables and functions, we have to go back and view their meanings again. The

Translated from jQuery Cookbook (O 'Reilly 2009) Chapter 2 Selecting Elements with jQuery, 2.0 Introduction JQuery's core is its selector engine, which filters out elements from documents by name, attribute, status, and so on. Because CSS is widely

The getYear () function is not recommended long ago, because it is incorrectly displayed in Firefox, And the getFullYear () function is recommended.Firefox does not support the innerText attribute. You need to change it to textContent to receive the

Document. createElement () is an object created in the object. It must be used together with the appendChild () or insertBefore () method. The appendChild () method adds a new subnode at the end of the subnode list of the node. The insertBefore ()

The replace function accepts two parameters. The first parameter is a string or regular expression. The first parameter can also accept a string or a function. First, if the first parameter is a string, we no longer need to say "I am a boy". replace

ObjectivesWithin 30 minutes, you can understand what a regular expression is and have some basic knowledge about it, so that you can use it in your own program or webpage. How to use this tutorial The most important thing is-Please give me 30

Online Demo You can still remember the jquery. validationEngine plug-in that we have introduced. Using this plug-in, you can generate a powerful form verification function without having to write any line of js Code. Is it amazing? The introduction

This is an article about object-oriented and Inheritance of JavaScript. It was written one year ago. The author has made a step-by-step process. It is very helpful for those who want to learn object-oriented in JavaScript. Therefore, I try to

Use js to obtain information about the local computer (but only in the IE browser, which is not available in other browsers ):Copy codeThe Code is as follows: ieTest

I have forgotten that I am a programmer because I have never been a technical article. Today I am writing something that I have encountered at work. I learned it together and it is quite simple. Pop-up windowDuring our work, we often encounter

In front-end html code, the vertical and horizontal scrolling of text or images is achieved by using marquee. However, with the consideration of browser compatibility and w3c standards, later I thought it would be implemented using javascript code.

In the development of Web projects, js and css files will become larger and larger with the development of projects, which brings some performance problems, such as js introduced by pages, the more css, the higher the number of http requests. A good

First, the html code:Copy codeThe Code is as follows: Js Code:Copy codeThe Code is as follows:Var compareContent = "the value you want to change ";If (compareContent! = ""){Document. getElementById ("compareIframe"). src = "ajax/changeSession.

Underscore is a very practical JavaScript library that provides support for many functions required for programming. It provides many practical functions without extending any JavaScript native objects.Whether you write a small js code or a large

Resource Access in Android Resources in Android refer to non-code parts and external files.Generally, native files are stored in assets. For example, MP3 files cannot be directly accessed by Android programs. They must be read in the form of binary

JSON (JavaScript Object Notation) is a lightweight data exchange format. It adopts a completely language-independent text format and is an ideal data exchange format. JSON is a native JavaScript format, which means that no special API or toolkit is

In today's Web browsers, it is a little difficult to handle events. Different browsers process events in different ways. Therefore, to overcome these cross-browser problems, people can use jQuery's event processing API.JQuery is a small JavaScript