flexbox-min-width-auto-002a.html (2721B)
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-002-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 (d) above, with "constraints in the other dimension" being "height". 30 --> 31 <style> 32 .flexbox { 33 display: flex; 34 width: 0px; /* 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 /* Flex items have sizing constraint in cross axis: */ 42 height: 30px; 43 } 44 </style> 45 </head> 46 <body> 47 <!-- Check for min-width:auto resolving correctly when the smallest 48 candidate value is: --> 49 50 <!-- *** (d) (with intrinsic aspect ratio) The width derived from ratio 51 and constraints in the other dimension *** --> 52 <!-- First, with a larger candidate 'flex-basis' value (from 'width') --> 53 <div class="flexbox"> 54 <img style="width: 100px" src="support/solidblue.png" alt="blue square"> 55 </div> 56 <!-- ...and now with a larger explicit 'flex-basis' value (which shouldn't 57 be considered for 'min-width:auto' anyway) --> 58 <div class="flexbox"> 59 <img style="flex-basis: 100px" src="support/solidblue.png" alt="blue square"> 60 </div> 61 <!-- ...and now with a smaller explicit 'flex-basis' value (which shouldn't 62 be considered for 'min-width:auto' anyway) --> 63 <div class="flexbox"> 64 <img style="flex-basis: 10px" src="support/solidblue.png" alt="blue square"> 65 </div> 66 </body> 67 </html>