flexbox-min-width-auto-001.html (3873B)
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-width: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-width-auto-001-ref.html"> 13 <!-- 14 This testcase tests the used value of "min-width:auto" (the property's 15 initial value) on flex items in a horizontal flex container. 16 17 It's supposed to resolve to the smallest of: 18 a) The used 'flex-basis' (taken from 'width'), if 'flex-basis' is at its 19 initial value. 20 b) The computed 'max-width' property 21 c) If there's no intrinsic aspect ratio: the item's min-content width. 22 d) If there is an intrinsic aspect ratio: the item's width 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-width. 27 28 This test checks for situations where we should resolve the min-width as 29 (a), (b), or (c) above. Another test will check (d). 30 --> 31 <style> 32 .flexbox { 33 display: flex; 34 width: 1px; /* No available space; shrink flex items to min-width */ 35 margin-bottom: 2px; /* (Just for spacing things out, visually) */ 36 } 37 38 .flexbox > * { 39 /* Flex items have purple border: */ 40 border: 2px dotted purple; 41 } 42 43 .flexbox > * > * { 44 /* Flex items' contents are gray & fixed-size: */ 45 background: gray; 46 height: 10px; 47 width: 80px; 48 } 49 </style> 50 </head> 51 <body> 52 <!-- Check for min-width:auto resolving correctly when the smallest 53 candidate value is: --> 54 <!-- *** (a) Used 'flex-basis' (from 'width') *** --> 55 <!-- First, without definite max-width: --> 56 <div class="flexbox"> 57 <div style="width: 50px"><div></div></div> 58 </div> 59 <!-- ...and now with definite (& large) 'max-width': --> 60 <div class="flexbox"> 61 <div style="width: 50px; max-width: 120px;"><div></div></div> 62 </div> 63 <!-- ...and now with used 'flex-basis' being a calc expression:--> 64 <div class="flexbox"> 65 <div style="width: calc(10% + 50px)"><div></div></div> 66 </div> 67 68 <!-- *** (b) The computed 'max-width' *** --> 69 <!-- First, with a larger candidate 'flex-basis' value (from 'width') --> 70 <div class="flexbox"> 71 <div style="width: 100px; max-width:50px"><div></div></div> 72 </div> 73 <!-- ...and now with a larger explicit 'flex-basis' value (which shouldn't 74 be considered for 'min-width:auto' anyway) --> 75 <div class="flexbox"> 76 <div style="flex-basis: 100px; max-width:50px"><div></div></div> 77 </div> 78 <!-- ...and now with a smaller explicit 'flex-basis' value (which shouldn't 79 be considered for 'min-width:auto' anyway) --> 80 <div class="flexbox"> 81 <div style="flex-basis: 10px; max-width:50px"><div></div></div> 82 </div> 83 84 <!-- *** (c) (no intrinsic aspect ratio) The min-content size *** --> 85 <!-- First, with a larger candidate 'flex-basis' value (from 'width') --> 86 <div class="flexbox"> 87 <div style="width: 100px"><div></div></div> 88 </div> 89 <!-- ...and now with a larger explicit 'flex-basis' value (which shouldn't 90 be considered for 'min-width:auto' anyway) --> 91 <div class="flexbox"> 92 <div style="flex-basis: 100px"><div></div></div> 93 </div> 94 <!-- ...and now with a smaller explicit 'flex-basis' value (which shouldn't 95 be considered for 'min-width:auto' anyway) --> 96 <div class="flexbox"> 97 <div style="flex-basis: 10px"><div></div></div> 98 </div> 99 </body> 100 </html>