Hasty Treat - Container Queries Are Here

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

18:49 - How to try them today

Download and/or update Chrome Canary
Go to chrome://flags
Search and enable "CSS Container Queries"
Restart the browser

19:27 - Demos

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

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