February 2013
Intermediate to advanced
164 pages
3h 15m
English
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Preface
Modern web applications represent the new way to write software. Facebook, Twitter, and Wikipedia are some well-known examples of such applications. They run on servers, and users can access them with a browser via either desktop or mobile devices. We refer to these as “modern” applications because they combine a rich user interface with real-time interaction and the capability to connect with online services, among other capabilities.
Opa is a programming framework for JavaScript that enables you to easily write modern web applications that have all the aforementioned cool features. This book is a gentle introduction to Opa.
What Is Opa?
Traditionally, many different technologies and languages are involved when writing web applications. Not so with Opa! Opa is the only technology you need to know to write the code that runs on the client (in the browser) and the code that runs on the server, including database queries.
Opa natively supports the web platform, which is a set of technologies that includes HTML5 and CSS, and it automates many aspects of modern web application programming: Ajax/Comet client/server communication, event-driven and nonblocking code transformations, etc.
One of the main distinctive features of Opa is strong static typing, with type inference. This means that every application you write is checked by a program called a typechecker that automatically tracks inconsistencies in the application. Typing enables Opa programmers to debug applications quickly, ...
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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.