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Understanding the jQuery event handling features

From: jQuery Essential Training

Video: Understanding the jQuery event handling features

In this chapter, we're going to handle working with events in jQuery. So jQuery provides a mechanism for working with events that is simpler than relying on the Document Object Model. And if you've ever worked with events in modern webpage development, one of the things you've probably noticed is that it's pretty frustrating because the different browsers have different ways of working with the modern event implementations. Specifically, IE has its own way of attaching events to and disconnecting them from elements, which is separate from the DOM Level 2 Specification, which is what a lot of the other browsers follow.

Understanding the jQuery event handling features

In this chapter, we're going to handle working with events in jQuery. So jQuery provides a mechanism for working with events that is simpler than relying on the Document Object Model. And if you've ever worked with events in modern webpage development, one of the things you've probably noticed is that it's pretty frustrating because the different browsers have different ways of working with the modern event implementations. Specifically, IE has its own way of attaching events to and disconnecting them from elements, which is separate from the DOM Level 2 Specification, which is what a lot of the other browsers follow.

And because jQuery works with sets of elements by default, it's very easy to write code that assigns event handlers to groups of objects, just by using the results of the selectors and filters that we've already seen. So jQuery events basically break down into a couple of categories. The first is the Binding and Unbinding category. These functions allow you to wire events up, and take them off of elements in a simple cross-browser way.

And we'll see an example of that in a moment. The next is the Unified Event Object. Another thing that you've probably noticed if you've done web development or cross-browsers with modern events is that the event object is slightly different between the IE browsers and other browsers, and jQuery solves that problem by creating a unified event object that exposes the properties and methods that you use most commonly in a cross-browser way.

Then finally there is a bunch of convenience features and these are basically functions that encapsulate a lot of common event features and helper routines that work cross-browsers and we'll see an example of those as well. So now that we understand what event handling in jQuery is and what we are going to do, let's see a good example.

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jQuery Essential Training

49 video lessons · 94644 viewers

Joe Marini
Author

 
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  1. 2m 52s
    1. Welcome
      1m 9s
    2. Using the exercise files
      1m 43s
  2. 17m 37s
    1. What is jQuery?
      5m 19s
    2. Downloading and installing jQuery
      2m 20s
    3. Creating a simple jQuery-enabled page
      7m 12s
    4. Overview of features in jQuery
      2m 46s
  3. 59m 57s
    1. Overview of selectors and filters
      2m 9s
    2. Using basic jQuery selectors
      9m 6s
    3. Using basic jQuery filters
      8m 35s
    4. Using jQuery attribute filters
      6m 7s
    5. Child, visibility, and content filters
      9m 59s
    6. Form selectors and filters
      9m 3s
    7. Traversing documents
      9m 1s
    8. Understanding jQuery statement chaining
      1m 42s
    9. Practical example 1: Annotating page links
      4m 15s
  4. 47m 16s
    1. Creating, getting, and setting content
      5m 53s
    2. Manipulating attributes
      5m 43s
    3. Inserting content
      4m 57s
    4. Wrapping, replacing, and removing content
      5m 27s
    5. Working with CSS
      6m 19s
    6. Associating data with page elements
      9m 30s
    7. Practical example 2: Automatic TOC generator
      9m 27s
  5. 33m 6s
    1. Understanding the jQuery event handling features
      2m 4s
    2. Binding and unbinding events
      6m 23s
    3. Convenient event helper methods
      4m 40s
    4. Using the jQuery event object
      6m 21s
    5. Using miscellaneous event features
      4m 38s
    6. Practical example 3: Table striping and highlighting
      9m 0s
  6. 28m 45s
    1. Hiding and showing elements
      5m 23s
    2. Fading elements in and out
      4m 2s
    3. Sliding elements
      4m 3s
    4. Creating custom animations
      5m 58s
    5. Practical example 4: Image rotator
      9m 19s
  7. 25m 30s
    1. Introduction to jQuery UI
      3m 40s
    2. Exploring the jQuery UI widgets
      5m 24s
    3. Exploring the jQuery UI effects
      3m 58s
    4. Using the jQuery UI ThemeRoller
      4m 11s
    5. Downloading and installing jQuery UI
      8m 17s
  8. 47m 49s
    1. Overview of the sample web site
      3m 50s
    2. Using the accordion widget
      9m 14s
    3. Creating an image rotator
      10m 22s
    4. Building hover tooltips
      7m 26s
    5. Making an image selector
      9m 30s
    6. Using the Resizable effect
      7m 27s
  9. 30m 2s
    1. Working with Asynchronous JavaScript and XML (AJAX)
      10m 8s
    2. Using AJAX helpers
      4m 34s
    3. Understanding AJAX data types
      10m 14s
    4. Using global AJAX event handlers
      5m 6s
  10. 20s
    1. Goodbye
      20s

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