In this Hasty Treat, Scott and Wes talk about CSS container queries, what they are and how to use them.

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Show Notes

07:22 - Why?

• Container queries are media queries for components (e.g. they are based on the element’s size, not the browser).
• This is in line with how we write components.
• It will change the way we write CSS.

08:49 - The Syntax

• Containers need to be defined as containers via containment context

.container { contain: size layout; }

New contain value:

.inline-container { contain: inline-size; }

This is the same as the logical properties. Assuming you read LTR, or RTL:

• size - width and height
• inline-size = width
• block-size = height

/* @container { } */ @container (inline-size > 45em) { .media-object { grid-template: "img content" auto / auto 1fr; } }

18:49 - How to try them today

1. Download and/or update Chrome Canary
2. Go to chrome://flags
3. Search and enable “CSS Container Queries”
4. Restart the browser

19:27 - Demos

• Need Chrome Canary + Flag
• https://codepen.io/collection/XQrgJo
• https://codepen.io/una/pen/LYbvKpK?editors=1100

Links

• Miriam Suzanne
• Susy
• Miriam’s CSS Sandbox
• https://css.oddbird.net/rwd/query/explainer/
• Canary
• @addyosmani
• The CSS Podcast
• @jon_neal

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