flexbox-min-height-auto-002a.html (2786B)
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 "width". 30 --> 31 <style> 32 .flexbox { 33 display: flex; 34 flex-direction: column; 35 height: 1px; /* No available space; shrink flex items to min-height */ 36 margin-right: 2px; /* (Just for spacing things out, visually) */ 37 float: left; 38 } 39 40 .flexbox > * { 41 /* Flex items have purple border: */ 42 border: 2px dotted purple; 43 /* Flex items have sizing constraint in cross axis: */ 44 width: 30px; 45 } 46 </style> 47 </head> 48 <body> 49 <!-- Check for min-height:auto resolving correctly when the smallest 50 candidate value is: --> 51 52 <!-- *** (d) (with intrinsic aspect ratio) The height derived from ratio 53 and constraints in the other dimension *** --> 54 <!-- First, with a larger candidate 'flex-basis' value (from 'height') --> 55 <div class="flexbox"> 56 <img style="height: 100px" src="support/solidblue.png" alt="blue square"> 57 </div> 58 <!-- ...and now with a larger explicit 'flex-basis' value (which shouldn't 59 be considered for 'min-height:auto' anyway) --> 60 <div class="flexbox"> 61 <img style="flex-basis: 100px" src="support/solidblue.png" alt="blue square"> 62 </div> 63 <!-- ...and now with a smaller explicit 'flex-basis' value (which shouldn't 64 be considered for 'min-height:auto' anyway) --> 65 <div class="flexbox"> 66 <img style="flex-basis: 10px" src="support/solidblue.png" alt="blue square"> 67 </div> 68 </body> 69 </html>