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Head First JavaScript Programming, 2nd Edition
book

Head First JavaScript Programming, 2nd Edition

by Eric Freeman, Elisabeth Robson
August 2024
Beginner content levelBeginner
662 pages
17h 50m
English
O'Reilly Media, Inc.
Content preview from Head First JavaScript Programming, 2nd Edition

Chapter 9. Handling Events: Getting asynchronous

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After this chapter, you’re going to realize you aren’t in Kansas anymore. Up until now, you’ve been writing code that typically executes from top to bottom—sure, your code might be a little more complex than that, and make use of a few functions, objects, and methods, but at some point the code just runs its course. Now, we’re awfully sorry to break this to you this late in the book, but that’s not how you typically write JavaScript code. Rather, most JavaScript is written to react to events. What kind of events? Well, how about a user clicking on your page, data arriving from the network, timers expiring in the browser, changes happening in the DOM...and that’s just a few examples. In fact, all kinds of events are happening all the time, behind the scenes, in your browser. In this chapter we’re going rethink our approach to JavaScript coding, and look at how and why we should write code that reacts to events.

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Publisher Resources

ISBN: 9781098147938Errata Page