Open UI and implicit parent/child relationships in HTML – Eric Bailey

CSS { In Real Life } | I’ve Been Doing Blockquotes Wrong

It’s pretty easy to write bad HTML, because for most developers there are no consequences. If you write some bad Javascript, your application will probably crash and you or your users will get a horrible error message. It’s like a flashing light above your head telling the world you’ve done something bad. At the very least you’ll feel like a prize chump. HTML fails silently. Write bad HTML and maybe it means someone who doesn’t browse the web in exactly the same way as you do doesn’t get access to the information they need. But maybe you still get your pay rise and bonus.

So it’s frustrating to see the importance of learning HTML dismissed time and time again.

Hyper-responsive web components | Trys Mudford

Trys describes exactly the situation where you really do need to use the Shadow DOM in a web component—as opposed to just sticking to HTML web components—, and that’s when the component is going to be distributed and you have no idea where:

This component needed to be incredibly portable, looking great on any third-party website, in any position, at any viewport, with any amount of content. It had to be a “hyper-responsive” component.

HTML Web Components Make Progressive Enhancement And CSS Encapsulation Easier! | CSS-Tricks

Three great examples of HTML web components:

What I hope is that you now have the same sort of epiphany that I had when reading Jeremy Keith’s post: HTML Web Components are an HTML-first feature.

Churn

This is a good description of the appeal of HTML web components:

WC lifecycles are crazy simple: you register the component with customElements.define and it’s off to the races. Just write a class and the browser will take care of elements appearing and disappearing for you, regardless of whether they came from a full reload, a fetch request, or—god forbid—a document.write. The syntax looks great in markup, too: no more having to decorate with js-something classes or data attributes, you just wrap your shit in a custom element called something-controller and everyone can see what you’re up to. Since I’m firmly in camp “progressively enhance or go home” this fits me like a glove, and I also have great hopes for Web Components improving the poor state of pulling in epic dependencies like date pickers or text editors.

jgarber623/aria-collapsible: A dependency-free Web Component that generates progressively-enhanced collapsible regions using ARIA States and Properties.

This is a really lovely little HTML web component from Jason. It does just one thing—wires up a trigger button to toggle-able content, taking care of all the ARIA for you behind the scenes.