CSS Wizardry
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Hi there, I'm Harry Roberts. I am an award-winning Consultant Web Performance Engineer, designer, developer, writer, and speaker from the UK. I write, tweet, speak, and share code about measuring and improving site speed.
CSS Wizardry
1w ago
Learn how the Cache-Control request header works, how browsers handle refresh and hard refresh caching, and when developers should use it for realtime data and offline-first applications ..read more
CSS Wizardry
1M ago
Is HTML a programming language? In this short post, I explore why HTML is powerful, fundamental, and essential—but not a programming language. Discover why semantics matter less than practical value and why HTML deserves more respect ..read more
CSS Wizardry
3M ago
I’ve recently decided to apply the permissive MIT License to all content on CSS Wizardry by default. How does this affect you ..read more
CSS Wizardry
3M ago
How can CSS impact network and resource-loading performance? Can things be that serious ..read more
CSS Wizardry
3M ago
How can we make it easier for businesses to understand when and what to measure ..read more
CSS Wizardry
3M ago
What should you do when you first get launched into an old, sprawling CSS codebase ..read more
CSS Wizardry
3M ago
How and when do browsers download certain types of image? What does that mean for performance ..read more
CSS Wizardry
3M ago
Gathering data about third-parties using free and open-source tooling ..read more
CSS Wizardry
3M ago
An overview of my hardware and software setup for listening to digital music ..read more