border-corner-shape is in danger, and you can help!

Remember my previous post about an app I made to preview border-corner-shape? It stirred a lot of discussion in the CSS WG, and David Baron posted this: appears to me to be an example of a feature that’s addressing a problem that we don’t have — or at least that we don’t have enough […]

Preview corner-shape, before implementations!

As an editor of the Backgrounds & Borders Level 4 spec, I am naturally a bit more interested in the cool features it will bring, once implementations start (it’s currently too early for that). One of the coolest features in it is corner-shape. While in Backgrounds & Borders 3, border-radius was only used for rounded […]

Easily center text vertically, with SVG!

These days, we have a number of different ways to vertically align text in a container of variable dimensions: Table display modes Flexbox inline-block hacks Wrapping the text in an extra element and absolutely positioning it …and probably many others I’m forgetting However, often comes a time when neither is suitable, so here I am, […]

Use MathML today, with CSS fallback!

These days, I’m working on the slides for my next talk, “The humble border-radius”. It will be about how much work is put into CSS features that superficially look as simple as border-radius, as well as what advances are in store for it in CSS Backgrounds & Borders 4 (of which I’m an editor). It […]

iOS 6 switch style checkboxes with pure CSS

I recently found myself looking at the Tools switch in Espresso: Not because I was going to use it (I rarely do), but because I started wondering what would be the best way to replicate this effect in CSS. I set on to create something that adhered to the following rules: It should be keyboard […]

W3Conf in San Francisco, February 21-22

You might have heard about W3Conf, W3C’s conference for web designers and developers. This year, I have the pleasure of not only speaking there but also organizing it, along with Doug Schepers and designing the website for it. Alongside with yours truly, it features an excellent lineup of amazing speakers like Eric Meyer, Alexis Deveria of […]

One year of pastries

Last September, I was approached by Alex Duloz, who invited me to take part in his ambitious new venture, The Pastry Box Project. Its goal was to gather 30 people (“bakers”) every year who are influential in their field and ask them to share twelve thoughts — one per month. For 2012, that field would […]

CSS Animations with only one keyframe

This is a very quick tip, about a pet peeve of mine in almost every CSS animation I see. As you may know, I’m a sucker for reducing the amount of code (as long as it remains human readable of course). I demonstrated a very similar example in my “CSS in the 4th dimension” talk, […]

Lots of improvements coming to dabblet

I posted about this in both the blog and Dabblet’s blog, but I thought it might be interesting to many readers of this blog as well: As many of you probably know, I’ve started working for W3C Developer Relations since this August. Half of my time is devoted to, a very promising project […]

Easy color contrast ratios

I was always interested in accessibility, but I never had to comply with any guidelines before. At W3C, accessibility is considered very important, so everything we make needs to pass WCAG 2.0 AA level. Therefore, I found myself calculating color contrast ratios very frequently. It was a very enlightening experience. I used to think that […]