<!DOCTYPE html> <link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org"> <link rel="help" href="https://drafts.csswg.org/css-flexbox/#flex-base-size"> <link rel="help" href="https://drafts.csswg.org/css-flexbox/#algo-cross-item"> <link rel="match" href="../reference/ref-filled-green-100px-square.xht"> <meta name="assert" content="A column flex container shrink wraps items both when determining their flex base sizes and when laying them out after their flexed size has been determined." /> <style> x-flexbox { display: flex; flex-direction: column; } x-item { display: block; background: red; /* Override default alignment of "stretch" because items don't shrink to fit when they are stretched. */ align-self: start; } #mainSizeDependsOnCrossSize { padding-bottom: 50%; background: green; } #widthSetter { width: 100px; height: 50px; background: green; } </style> <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> <x-flexbox> <x-item> <!-- If fit-content is skipped when determining flex base size, this item gets a main size of 50px + 100vw / 2. --> <div id=widthSetter></div> <div id=mainSizeDependsOnCrossSize></div> </x-item> </x-flexbox>