jQuery Event Extensions

jQuery offers several ways to extend its event system to provide custom functionality when events are attached to elements. Internally in jQuery, these extensions are primarily used to ensure that standard events such as submit and change behave consistently across browsers. However, they can also be used to define new events with custom behavior. This … Continue reading

Introducing Events

link IntroductionWeb pages are all about interaction. Users perform a countless number of actions such as moving their mice over the page, clicking on elements, and typing in textboxes — all of these are examples of events. In addition to these user events, there are a slew of others that occur, like when the page … Continue reading

Advanced Plugin Concepts

link Provide Public Access to Default Plugin SettingsAn improvement we can, and should, make to the code above is to expose the default plugin settings. This is important because it makes it very easy for plugin users to override/customize the plugin with minimal code. And this is where we begin to take advantage of the … Continue reading

How To Use the Widget Factory

To start, we'll create a progress bar that just lets us set the progress once. As we can see below, this is done by calling jQuery.widget() with two parameters: the name of the plugin to create, and an object literal containing functions to support our plugin. When our plugin gets called, it will create a … Continue reading

Writing Stateful Plugins with the jQuery UI Widget Factory

link Writing Stateful Plugins with the jQuery UI Widget FactoryWhile most existing jQuery plugins are stateless – that is, we call them on an element and that is the extent of our interaction with the plugin – there's a large set of functionality that doesn't fit into the basic plugin pattern. In order to fill … Continue reading

Contributing

Depending on your level of experience with some of the workflows common to many open source projects, e.g. git/GitHub, the command line, and setting up a local development environment, contributing to this site may be a breeze or come with a bit of a learning curve. If you fit into the former group, great! Jump … Continue reading

jQuery’s Ajax-Related Methods

While jQuery does offer many Ajax-related convenience methods, the core $.ajax() method is at the heart of all of them, and understanding it is imperative. We'll review it first, and then touch briefly on the convenience methods. It's often considered good practice to use the $.ajax() method over the jQuery provided convenience methods. As you'll … Continue reading

Manipulating Elements

For complete documentation of jQuery manipulation methods, visit the Manipulation documentation on api.jquery.com. link Getting and Setting Information About ElementsThere are many ways to change an existing element. Among the most common tasks is changing the inner HTML or attribute of an element. jQuery offers simple, cross-browser methods for these sorts of manipulations. You can … Continue reading

Creating a Custom Theme with ThemeRoller

link Theming OverviewjQuery Mobile has a robust theme framework that supports up to 26 sets of toolbar, content, and button colors, called a "swatch". The framework comes with five defined themes (swatches "a" to "e") which can be used readily, removed, or overwritten. link Default Theme Swatch Mapping for ComponentsIf no theme swatch letter is … Continue reading

Deferred examples

link Further Deferreds examplesDeferreds are used behind the hood in Ajax but it doesn't mean they can't also be used elsewhere. This section describes situations where deferreds will help abstract away asynchronous behavior and decouple our code. link Cachinglink Asynchronous cacheWhen it comes to asynchronous tasks, caching can be a bit demanding since you have … Continue reading

Getting Started with jQuery UI

link What is jQuery UI?jQuery UI is a widget and interaction library built on top of the jQuery JavaScript Library that you can use to build highly interactive web applications. This guide is designed to get you up to speed on how jQuery UI works. Follow along below to get started. link Start by Checking … Continue reading

Introduction to Effects

link Showing and Hiding ContentjQuery can show or hide content instantaneously with .show() or .hide(): 1 2 3 4 5 // Instantaneously hide all paragraphs$( "p" ).hide(); // Instantaneously show all divs that have the hidden style class$( "div.hidden" ).show(); When jQuery hides an element, it sets its CSS display property to none. This means … Continue reading

About This Site

Learning how and when to use jQuery is a different process for each and every web developer, depending largely on experience with the primary tools for front-end development (HTML, CSS, and JavaScript) and knowledge of general programming principles. Over the years developers of all stripes have come to rely on our API documentation for help … Continue reading

Extending Widgets with the Widget Factory

jQuery UI's widget factory makes it easy to build widgets that extend the functionality of existing widgets. Doing so allows you to build powerful widgets on top of an existing base, as well as make small tweaks to an existing widget's functionality. Note: This article assumes some basic knowledge of what the widget factory is … Continue reading

jQuery Event Basics

link jQuery Event Basicslink Setting Up Event Responses on DOM ElementsjQuery makes it straightforward to set up event-driven responses on page elements. These events are often triggered by the end user's interaction with the page, such as when text is entered into a form element or the mouse pointer is moved. In some cases, such … Continue reading

How to Create a Basic Plugin

Sometimes you want to make a piece of functionality available throughout your code. For example, perhaps you want a single method you can call on a jQuery selection that performs a series of operations on the selection. In this case, you may want to write a plugin. link How jQuery Works 101: jQuery Object MethodsBefore … Continue reading

How jQuery Works

link jQuery: The BasicsThis is a basic tutorial, designed to help you get started using jQuery. If you don't have a test page setup yet, start by creating the following HTML page: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 <!doctype html><html><head> <meta charset="utf-8"> <title>Demo</title></head><body> <a href="http://jquery.com/">jQuery</a> … Continue reading

Getting Started with jQuery Mobile

jQuery Mobile provides a set of touch-friendly UI widgets and an Ajax-powered navigation system to support animated page transitions. This guide will show you how you can build your first jQuery Mobile application. link Create a Basic Page TemplateTo get started, you can simply paste the template below in your favorite text editor, save, and … Continue reading

Handling Events

jQuery provides a method .on() to respond to any event on the selected elements. This is called an event binding. Although .on() isn't the only method provided for event binding, it is a best practice to use this for jQuery 1.7+. To learn more, read more about the evolution of event binding in jQuery. The … Continue reading

Code Organization Concepts

When you move beyond adding simple enhancements to your website with jQuery and start developing full-blown client-side applications, you need to consider how to organize your code. In this chapter, we'll take a look at various code organization patterns you can use in your jQuery application and explore the RequireJS dependency management and build system. … Continue reading