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We’ve relied on media queries for a long time in the responsive world of CSS but they have their share of limitations and have shifted focus more towards accessibility than responsiveness alone. This is where CSS Container Queries come in. They completely change how we approach responsiveness, shifting the paradigm away from a viewport-based mentality to one that is more considerate of a component’s context, such as its size or inline-size.
Querying elements by their dimensions is one of the two things that CSS Container Queries can do, and, in fact, we call these container size queries to help distinguish them from their ability to query against a component’s current styles. We call these container style queries.
Existing container query coverage has been largely focused on container size queries, which enjoy 90% global browser support at the time of this writing. Style queries, on the other hand, are only available behind a feature flag in Chrome 111+ and Safari Technology Preview.