What’s Important #1: Advent Calendars, CSS Wrapped, Web Platform Updates, and More

Welcome to the inaugural What’s !important, a roundup of the top CSS and web development updates from the past fortnight. If you’re short on time or can’t bear to miss out on anything CSS-related, this is your recap hub:

• top CSS/web dev articles from across the web,
• noteworthy announcements and quick-read links we shared,
• the latest from Chrome, Firefox, and Safari,
• and possibly more.

Let’s dive in!

HTMHell Advent Calendar 2025

Manuel Matuzović has crafted a fun HTMHell Advent Calendar 2025 featuring 24 HTML-focused articles — one for each day until Christmas. We’re already 16 articles in, promising 8 more treats. A standout for me is the article on Invoker Commands, now supported in all web browsers, making it a double win!

Post Tags: #1#16#24#announcements#articles#browsers#chrome#Commands#css#dev#Development#firefox#fun#html#it#News#one#recap#Roundup#safari#time#top#updates#web#web dev