CSS Container Queries: A Practical Guide with Real Examples
Learn CSS container queries with 10 real, draggable demos — resize live boxes and watch components adapt to their container, not the viewport.
CSS Container Queries: A Practical Guide with Real Examples
A media query only ever knows one thing: how wide the browser window is. That's a problem the moment a component gets reused somewhere its container isn't the full page — a sidebar widget, a dashboard tile that might span one grid column or three, a card dropped into a narrow panel on a wide desktop screen. The component has no way to know its own width; all it can ask is "how big is the whole window," which is often a completely different number. Container queries fix this by letting an element query the size of its own container instead of the viewport. Mark an ancestor as a "query container" with one CSS property, and anything inside it can react to that element's width (or height) with an @container rule — the same component then looks right whether it's sitting in a 200px sidebar or a 600px main column, without a single line of JavaScript and without caring what the browser window is doing. The 10 demos below are all real, draggable examples — li…
