Christian Heilmann

HTML and CSS still isn’t about painting with code

January 21st, 2021

The other day I had a friend come to my place with the request to “learn HTML and how web sites work”. We spent a few hours playing with the topic and she got excited and quite far into it. The whole thing reminded me about a real problem when it comes to teaching people […]

Seven ways to test for accessibility of your web site with browser Developer Tools

January 11th, 2021

There are lots of ways to test your web site for accessibility issues. Services, software packages, even human testing companies. They all have their place and often a test with real people is the best thing to do. However, for a quick, preliminary test you don’t need to install anything or pay for a service. […]

Back to basics: adding a playback speed control to an audio player

December 28th, 2020

Currently I am publishing the new Developer Advocacy Handbook chapter by chapter and I also started recording audio versions of each chapter. A common request of people is to be able to control the speed of a audio/video recording. Luckily enough, using basic HTML5 and JavaScript, this is not that hard to achieve, so let’s […]