flexbox-min-height-auto-002c.html (2833B)
1 <!DOCTYPE html> 2 <!-- 3 Any copyright is dedicated to the Public Domain. 4 http://creativecommons.org/publicdomain/zero/1.0/ 5 --> 6 <html> 7 <head> 8 <meta charset="utf-8"> 9 <title>CSS Test: Testing min-height:auto</title> 10 <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com"> 11 <link rel="help" href="http://www.w3.org/TR/css-flexbox-1/#min-size-auto"> 12 <link rel="match" href="flexbox-min-height-auto-002-ref.html"> 13 <!-- 14 This testcase tests the used value of "min-height:auto" (the property's 15 initial value) on flex items in a vertical flex container. 16 17 It's supposed to resolve to the smallest of: 18 a) The used 'flex-basis' (taken from 'height'), if 'flex-basis' is at its 19 initial value. 20 b) The computed 'max-height' property 21 c) If there's no intrinsic aspect ratio: the item's min-content height. 22 d) If there is an intrinsic aspect ratio: the item's height derived from 23 the ratio & constraints in the other dimension. 24 25 We measure what the used value is by putting flex items in a small flex 26 container, which will shrink its items down to their min-height. 27 28 This test checks for situations where we should resolve the min-height as 29 (d) above, with "constraints in the other dimension" being 30 max-width-clamped "width". 31 --> 32 <style> 33 .flexbox { 34 display: flex; 35 flex-direction: column; 36 height: 1px; /* No available space; shrink flex items to min-height */ 37 margin-right: 2px; /* (Just for spacing things out, visually) */ 38 float: left; 39 } 40 41 .flexbox > * { 42 /* Flex items have purple border: */ 43 border: 2px dotted purple; 44 /* Flex items have sizing constraint in cross axis: */ 45 max-width: 30px; 46 width: 60px; 47 } 48 </style> 49 </head> 50 <body> 51 <!-- Check for min-height:auto resolving correctly when the smallest 52 candidate value is: --> 53 54 <!-- *** (d) (with intrinsic aspect ratio) The height derived from ratio 55 and constraints in the other dimension *** --> 56 <!-- First, with a larger candidate 'flex-basis' value (from 'height') --> 57 <div class="flexbox"> 58 <img style="height: 100px" src="support/solidblue.png" alt="blue square"> 59 </div> 60 <!-- ...and now with a larger explicit 'flex-basis' value (which shouldn't 61 be considered for 'min-height:auto' anyway) --> 62 <div class="flexbox"> 63 <img style="flex-basis: 100px" src="support/solidblue.png" alt="blue square"> 64 </div> 65 <!-- ...and now with a smaller explicit 'flex-basis' value (which shouldn't 66 be considered for 'min-height:auto' anyway) --> 67 <div class="flexbox"> 68 <img style="flex-basis: 10px" src="support/solidblue.png" alt="blue square"> 69 </div> 70 </body> 71 </html>