Can flexbox detect when a flex item wraps?

Can flexbox detect when a flex item wraps?

No.

In CSS, once the browser renders the page on the initial cascade, it doesn’t reflow the document when an element wraps. As a result, parent elements don’t know when their children wrap.

That’s why containers don’t shrink-to-fit their content after wrapping.

That’s why you need media queries or JavaScript.

Here are some more details:

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