Don’t let the title fool you—this isn’t just for parallax scrolling (thank goodness!)—it’s for triggering any CSS updates based on scroll position. Using CSS custom properties makes a lot of sense. The JavaScript/CSS bridge enabled by custom properties is kind of their superpower. (That’s one of the reasons why I don’t like calling them “CSS variables” which makes them sound like Sass variables—they’re so much more than that!)
Marco gives a run-down of the basics of getting accessibility right on the web. Nothing here is particularly onerous but you’d surprised how often developers get this wrong (or simply aren’t aware of it).
He finishes with a plea to avoid unnecessary complexity:
If there’s one wish I have for Christmas from the web developer community at large, it is this: Be good citizens of the web, and learn proper HTML before you even so much as touch any JavaScript framework. Those frameworks are great and offer a lot of features, no doubt. But before you use hundreds of kilobytes of JavaScript to make something clickable, you may want to try if a simple button element doesn’t do the trick just as fine!
Following on from her great conversation with Jen on The Web Ahead podcast, Rachel outlines a strategy to avoid feeling overwhelmed by the deluge of tools, frameworks, libraries, and techniques inundating front-end developers every day:
Learn your core skills well. Understand HTML and CSS, be able to build a layout without leaning on a framework. Get a solid understanding of how a website actually gets from the server to a browser, an understanding of security and accessibility. These are the basics, the constants. These things change slowly. These things sit underneath all the complexity and the tooling, the CMSs and the noise of thousands of people all trying to make their mark on this industry.
She also makes this important point:
As you are doing this don’t forget to share what you know.