Ooh, this is clever! Scott shows how you can use rel="preload" to conditionally load JavaScript (say, for screens above a certain size). The browser support isn’t quite there yet, but the thinking here is smart.
A lightweight alternative to Modernizr. It doesn’t add classes to your markup so it’s up to what you do with the results of any test.
It’s perfect for cutting the mustard on a case-by-case basis.
Jason revisits some cutting-the-mustard techniques, as started by the BBC and refined by Jake. This kind of feature-testing is indispensable for progressive enhancement.
Personally though, I’m still uncomfortable with the assumptions baked into equating particular features with particular browsers …maybe I’ve known PPK too long.
I much prefer to cut the mustard on a case-by-case basis by feature testing the actual APIs I’m about to use in a script. I realise that might be harder to scale, and it’s more verbose, but it’s the only way to be absolutely sure.