March 2014
Beginner to intermediate
456 pages
8h 44m
English
Content preview from HTML5 Games: Creating Fun with HTML5, CSS3 and WebGL, 2nd Edition
Become 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 12
Local Storage and Caching
In This Chapter
• Introducing Web Storage
• Storing data in cookies versus in local storage
• Adding persistent data to the game
• Making a high score list
• Enabling offline play with application caching
HTTP COOKIES HAVE traditionally solved the problem of storing data in the browser. In this chapter, you learn how to use Web Storage, another technology born out of the HTML5 movement, to achieve some of the same functionality. You also find out how to use Web Storage to make the game remember where the player left off and how to add a high score list.
The final section discusses the application cache introduced by HTML5 and how you can use it to make your games accessible, even without a network connection.
Storing Data with Web Storage
Web Storage is often lumped in with other technologies under the HTML5 umbrella, although it has now been moved to its own specification (www.w3.org/TR/webstorage) and is being developed independently from HTML5.
Unlike cookies, data stored in Web Storage remains on the client and is never transferred to the server. Cookies, in contrast, are sent back and forth between the browser and the server with each HTTP request. This limits the amount of data you can store as cookies, and if the server has no use for the data, the bandwidth used to transmit the cookies is wasted. Browsers impose hard limits on the number and size of cookies. To stay on the safe side, store no more than 50 cookies and 4K per domain. ...
Become 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,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.