September 2014
Beginner
686 pages
20h 43m
English
Content preview from JavaScript & jQuery: The Missing Manual, 3rd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Chapter 4. Introducing jQuery
The first chapters of this book covered many of the fundamentals of the JavaScript programming language—the keywords, concepts, and syntax of JavaScript. Many of these concepts were fairly straightforward (“a variable is like a box in which you put a value”), but some topics may have had you scratching your head or reaching for a bottle of aspirin (like the for loops discussed on Handling Repetitive Tasks with Loops). The truth is, for most people, JavaScript programming is difficult. In fact, a 1,000-page book on JavaScript programming won’t cover everything there is to know about JavaScript and how it works in the many different web browsers out in the wild.
Programming is hard. That’s why this book covers both JavaScript and jQuery. As you’ll see in the first section of this chapter, jQuery is a JavaScript library that lets you jump-start your programming by handling many of the messy details of JavaScript programming for you. jQuery—whose motto is “write less, do more”—makes programming fun, fast, and rewarding. With jQuery, you can achieve in a single line of code what could take dozens (if not more) lines of pure JavaScript programming. After you go through this and the following chapter, you’ll be able to achieve more with your web pages than if you studied that 1,000-page book on JavaScript alone.
About JavaScript Libraries
Many JavaScript programs have to deal with the same set of web page tasks again and again: selecting an element, adding new ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.