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Mastering JavaScript

You're reading from   Mastering JavaScript Explore and master modern JavaScript techniques in order to build large-scale web applications

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Product type Paperback
Published in Jan 2016
Publisher
ISBN-13 9781785281341
Length 250 pages
Edition 1st Edition
Languages
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Author (1):
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Ved Antani Ved Antani
Author Profile Icon Ved Antani
Ved Antani
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Toc

Table of Contents (11) Chapters Close

Preface 1. JavaScript Primer FREE CHAPTER 2. Functions, Closures, and Modules 3. Data Structures and Manipulation 4. Object-Oriented JavaScript 5. JavaScript Patterns 6. Testing and Debugging 7. ECMAScript 6 8. DOM Manipulation and Events 9. Server-Side JavaScript Index

Event delegation


Event delegation allows us to attach a single event listener to a parent element. This event will fire for all the descendants matching a selector even if these descendants will be created in the future (after the listener was bound to the element).

We discussed event bubbling earlier. Event delegation in jQuery works primarily due to event bubbling. Whenever an event occurs on a page, the event bubbles up from the element that it originated from, up to its parent, then up to the parent's parent, and so on, until it reaches the root element (window). Consider the following example:

<html>
  <body>
    <div id="container">
      <ul id="list">
        <li><a href="http://google.com">Google</a></li>
        <li><a href="http://myntra.com">Myntra</a></li>
        <li><a href="http://bing.com">Bing</a></li>
      </ul>
    </div>
  </body>
</html>

Now let's say...

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