October 2008
Intermediate to advanced
434 pages
12h 7m
English
Content preview from Facebook Cookbook
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Displaying Content to Specific Browsers
Problem
I need to display content to specific browsers in order to get around some rendering issues.
Solution
Use the fb:user-agent
tag. The simplest form is:
<fb:user-agent includes="ie 6">
Your browser has lots of rendering issues!
</fb:user-agent>Discussion
You might want to use this tag for reasons other than browser idiosyncrasies, but that’s likely to be the main use. Every browser, crawler, indexer, etc. has a different “user-agent” string that represents the browser and company who make it. A few popular examples are given in Table 6-4.
Table 6-4. Some fun user-agent examples
User agent | Description |
|---|---|
Googlebot/2.1 (http://www.googlebot.com/bot.html) | Google crawler |
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.4; en-US; rv:1.9b5) Gecko/2008032619 Firefox/3.0b5 | Mozilla Firefox 3.0b5 on an Intel-based Mac running Mac OS X 10.4 |
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; bgft) | Microsoft Internet Explorer 7 on Windows XP |
Opera/9.00 (Windows NT 5.1; U; de) | Opera 9 on Windows NT, running in German |
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_2; en-ca) AppleWebKit/525.13 (KHTML, like Gecko) version/3.1 Safari/525.13 | Safari 3.1 on an Intel-based Mac running Mac OS X 10.5.2 |
For a full list of user agents, see the excellent http://www.user-agents.org, maintained by Andreas Staeding. You can also quickly find out the user agent for your browser by visiting http://www.whatsmyuseragent.com, which includes an excellent resource page about how to fake different ...
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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.