This page contains links to a few articles I found interesting, as well as other things I've worked on. Note that I have no particular connection with the authors listed here – they just happened to write some pieces that I think are particularly useful. Maybe you will too!
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Responsive Images: Use Cases and Documented Code Snippets to Get You Started, Andreas Bovens
For me, this is the definitive guide to responsive images in HTML – incredibly clear and succinct.
Optimizing HTTP/2 prioritization with BBR and tcp_notsent_lowat, Patrick Meenan
If you're not getting all the performance gains you were hoping for from H/2, this article might help explain why.
A Complete Guide to Flexbox, Chris Coyier
A picture paints a thousand words, and this simple guide has plenty, making it really easy to follow and to use for a quick reference if you need a refresher.
Best practices for optimising video streams on the web, Doug Sillars
It's long, it's detailed and it's technical, but still very readable and very useful.
I've recently been building apps with React and created a poker app that I'm hosting it on this site. It's also the subject of this blog post. You can find the repository here.