Inline conditionals in CSS, now? • Lea Verou
The CSS WG resolved to add if() to CSS, but that won’t be in browsers for a while. What are our options in the meantime? A couple days ago, I posted about the recent CSS WG resolution to add an if() function to CSS. Great as it may be, this is still a long way off, two years if everything goes super smoothly, more if not. So what can you do when you need conditionals right now? You may be pleased
JS private class fields considered harmful • Lea Verou
Today I mourn. What am I mourning? Encapsulation. At least in my projects. As a library author, I’ve decided to avoid private class fields from now on and gradually refactor them out of my existing libraries. Why did I make such a drastic decision? It all started a few days ago, when I was building a Vue 3 app that used Color.js Color objects. For context, Vue 3 uses proxies to implement its react
The failed promise of Web Components • Lea Verou
Web Components had so much potential to empower HTML to do more, and make web development more accessible to non-programmers and easier for programmers. Remember how exciting it was every time we got new shiny HTML elements that actually do stuff? Remember how exciting it was to be able to do sliders, color pickers, dialogs, disclosure widgets straight in the HTML, without having to include any wi
Refactoring optional chaining into a large codebase: lessons learned • Lea Verou
Refactoring optional chaining into a large codebase: lessons learned Chinese translation by Coink Wang Now that optional chaining is supported across the board, I decided to finally refactor Mavo to use it (yes, yes, we do provide a transpiled version as well for older browsers, settle down). This is a moment I have been waiting for a long time, as I think optional chaining is the single most subs
LCH colors in CSS: what, why, and how? • Lea Verou
I was always interested in color science. In 2014, I gave a talk about CSS Color 4 at various conferences around the world called “The Chroma Zone”. Even before that, in 2009, I wrote a color picker that used a hidden Java applet to support ICC color profiles to do CMYK properly, a first on the Web at the time (to my knowledge). I never released it, but it sparked this angry rant. Color is also ho
Refresh CSS Bookmarklet v2 • Lea Verou
Almost 11 years ago, Paul Irish posted this brilliant bookmarklet to refresh all stylesheets on the current page. Despite the amount of tools, plugins, servers to live reload that have been released over the years, I’ve always kept coming back to it. It’s incredibly elegant in its simplicity. It works everywhere: locally or remotely, on any domain and protocol. No need to set up anything, no need
The humble border-radius
Important This slide deck was created for use in a controlled environment, during a talk. It works best with (modern) Firefox OSX at 1024x768. Use Ctrl + {A, S, Z, X} in the live code examples to expose the inner & outer radii sizes of the top corners. The demos were live coded, so these slides are a bit pointless if you never watched the talk.
More CSS Secrets: Another 10 things you may not know about CSS
background: linear-gradient(white 30%, hsla(0,0%,100%,0)), linear-gradient(hsla(0,0%,100%,0), white 70%) bottom, radial-gradient(at top, rgba(0,0,0,.2), transparent 70%), radial-gradient(at bottom, rgba(0,0,0,.2), transparent 70%) bottom; background-repeat: no-repeat; background-size: 100% 40px, 100% 40px, 100% 14px, 100% 14px; background-attachment: local, local, scroll, scroll; background-attach
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State of HTML 2023 now open! • Lea Verou
URL rewriting with Github Pages • Lea Verou