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That was a very good explanation, thank you.

> Width/height: auto require a layout to know the size, so I don't know if we'll ever get that either

Surely the browser ultimately knows what the size is going to be?

It does but only after a layout. Interpolating from `height: 0;` to `height: 10px` is easy, but interpolating to `height: auto` takes an additional layout. I always assumed that you can't do this either for performance reasons or because it would be really hard to implement.

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