Microsoft is end-of-life-ing IE8–10, but that doesn’t mean we should stop supporting them. Some people can’t upgrade for reasons way beyond their control.
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Progressive enhancement is a tool that will help you build faster, tougher sites. It is an investment in the strength and quality of your application. It will make your users happy because the app will still work, if imperfectly. It might just save you when disaster strikes, and if you’re interested in building the best websites possible, you should give it some thought.
Accessibility is just good customer service. If you run an commerce shop, you should be following this article’s advice. Heck, if you run any kind of site, you should do it.
Some very interesting thoughts about accessibility advocacy from Pratik Patel.
“Learn More”/“Read More” has definitely inherited the mantle of “Click Here”. Do your users a favor and write descriptive link text. It’s really not that hard.
If you’re into this kind of thing…
I harp on this a lot: You can never trust the client (as in “the browser”). In this case, Joomla was not sanitizing User Agent strings before storing them in the database, opening a garage door-sized security hole.
There are lots of places the progressive enhancement mindset can be put into practice. Of course you do often control the server, so a particular feature being unavailable isn’t usually an issue, but good open source software looks for alternative tools—ImageMagick vs. GD, for example—and adjusts it’s program accordingly.
An excellent overview of progressively enhancing image uploads in what many would call a “web app”. See also this great writeup they did on their progressively enhanced maps.