Container queries are similar to media queries but allow you set styles based on a particular element’s current size, typically the width. This is super handy because you can write CSS in a way that gives flexibility to the layout! With @media queries, there’s a tight coupling of the styling of a component’s content and […]

The concept of event delegation in JavaScript boils down to this: rather than attach event handlers directly to the element triggering the event, attach it to an element higher up in the DOM. The event should bubble up there anyway, and you can test the event’s trigger element to ensure you’re responding to the event […]

What is a quantity query? It’s a bit of CSS that allows you to style an element (and its descendants) based on how many children the element has. Example of a Quantity Query Situation Imagine a homepage currently showing 20 articles, more than you normally show. Maybe it’s a slow news day, and the lead […]

First: the Light DOM is just… the regular DOM. When people talk about native Web Components, the Shadow DOM comes up a lot. I have extremely mixed feelings about the Shadow DOM. On one hand, it’s a powerful scoping tool. For example, CSS applied inside the Shadow DOM doesn’t “leak” outside, meaning you can be […]

If you need a mini build process just for your CSS, Lightning CSS is a pretty good modern choice. That, plus a file watcher and live reloader offers pretty good DX.

“Reactivity” is how systems react to changes in data. There are many types of reactivity, but for this article, reactivity is when data changes, you do things.