<!DOCTYPE html> <!-- Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/ --> <html> <head> <meta charset="utf-8"> <title>CSS Test: Testing min-width:auto & 'overflow' interaction</title> <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com"> <link rel="help" href="http://www.w3.org/TR/css-flexbox-1/#min-size-auto"> <link rel="match" href="flexbox-min-width-auto-004-ref.html"> <!-- This testcase checks how "overflow-y" indirectly impacts the sizing behavior of flex items with "min-width:auto" (the new initial value for "min-width"), via its influence on "overflow-x". In particular, the flex-item-specific "min-width:auto" behavior is supposed to be disabled (e.g. we end up with min-width:0) when "overflow-x" is non-"visible". Moreover, when "overflow-y" is set to a scrolling value, it forces "overflow-x" to compute to a scrolling value as well, as described at http://www.w3.org/TR/css-overflow-3/#overflow-properties So, "overflow-y" has an indirect effect (via "overflow-x") here. --> <style> .flexbox { display: flex; width: 30px; /* Shrink flex items below min-width */ margin-bottom: 2px; /* (Just for spacing things out, visually) */ } .flexbox > * { /* Flex items have purple border: */ border: 2px dotted purple; } .flexbox > * > * { /* Flex items' contents are gray & fixed-size: */ background: gray; height: 40px; width: 80px; } .yvisible { overflow-y: visible; } .yhidden { overflow-y: hidden; } .yscroll { overflow-y: scroll; } .yauto { overflow-y: auto; } </style> </head> <body> <!-- min-width:auto should prevent shrinking below intrinsic width when the flex item has "overflow-y: visible", but not for any other overflow-y values (because of overflow-y's influence on overflow-x). --> <div class="flexbox"><div class="yvisible"><div></div></div></div> <div class="flexbox"><div class="yhidden"><div></div></div></div> <div class="flexbox"><div class="yscroll"><div></div></div></div> <div class="flexbox"><div class="yauto"><div></div></div></div> </body> </html>