September 2010
Intermediate to advanced
592 pages
18h 30m
English
Content preview from Closure: The Definitive GuideBecome 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,
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Chapter 1. Introduction to Closure
Closure is a collection of tools for building rich web applications in JavaScript. Each tool in the suite is open-sourced under the Apache 2.0 license, and is created, maintained, and made available for free by Google. Closure is used in the development of many web applications at Google, including Gmail, Google Maps, and Google Docs. The performance and scale of these web applications is a testament to the strength and sophistication of the Closure Tools suite.
Some developers might balk at the thought of expanding the role of JavaScript in their web applications. Why should the codebase of a language that relies on global variables and has no support for namespaces get bigger and more complex? Others may point out that Google simultaneously offers the Google Web Toolkit (GWT) so that web developers do not even have to concern themselves with JavaScript. Why do we need new tools for JavaScript when the tools for avoiding it already exist?
Whether you like it or not, JavaScript is the lingua franca of the Web. Although tools such as GWT do a reasonable job of abstracting away JavaScript, they also create barriers between you and the metal of the browser. Instead of creating tools to circumvent JavaScript, why not build tools to address its problems head-on?
This is where Closure comes in: the tools make it significantly easier to maintain a large JavaScript codebase. Using Closure essentially extends JavaScript to include features available in other ...
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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.Julian F.
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.Addison B.
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.Amir M.
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.