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HTML5 Please - Use the new and shiny responsibly. (Better) Tabs with Round Out Borders. The following is a guest post by Menno van Slooten.
You might notice we've been down this road before, but I quite like Menno's approach here. The end result proves you can get a little fancier with the design than I originally did, with borders, gradients, and shadows and while actually using less elements. A good-looking tab control usually has one feature that I've always found impossible to reproduce without images: borders that bend to the outside at the bottom of each tab.
In this article I would like to show how you can use the CSS :before and :after pseudo elements to create this effect without using images. First, let's start with some basic markup. HTML5 Cross Browser Polyfills - GitHub. So here we're collecting all the shims, fallbacks, and polyfills in order to implant html5 functionality in browsers that don't natively support them.
The general idea is that: we, as developers, should be able to develop with the HTML5 apis, and scripts can create the methods and objects that should exist. Developing in this future-proof way means as users upgrade, your code doesn't have to change but users will move to the better, native experience cleanly. Looking for a way to conditionally load these scripts client-side based on feature detects?