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flexbox-min-width-auto-002b.html
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flexbox-min-width-auto-002b.html
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<!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</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-002-ref.html">
<!--
This testcase tests the used value of "min-width:auto" (the property's
initial value) on flex items in a horizontal flex container.
It's supposed to resolve to the smallest of:
a) The used 'flex-basis' (taken from 'width'), if 'flex-basis' is at its
initial value.
b) The computed 'max-width' property
c) If there's no intrinsic aspect ratio: the item's min-content width.
d) If there is an intrinsic aspect ratio: the item's width derived from
the ratio & constraints in the other dimension.
We measure what the used value is by putting flex items in a small flex
container, which will shrink its items down to their min-width.
This test checks for situations where we should resolve the min-width as
(d) above, with "constraints in the other dimension" being "min-height".
-->
<style>
.flexbox {
display: flex;
width: 0px; /* No available space; shrink flex items to min-width */
margin-bottom: 2px; /* (Just for spacing things out, visually) */
}
.flexbox > * {
/* Flex items have purple border: */
border: 2px dotted purple;
/* Flex items have sizing constraint in cross axis: */
min-height: 30px;
}
</style>
</head>
<body>
<!-- Check for min-width:auto resolving correctly when the smallest
candidate value is: -->
<!-- *** (d) (with intrinsic aspect ratio) The width derived from ratio
and constraints in the other dimension *** -->
<!-- First, with a larger candidate 'flex-basis' value (from 'width') -->
<div class="flexbox">
<img style="width: 100px" src="support/solidblue.png" alt="blue square">
</div>
<!-- ...and now with a larger explicit 'flex-basis' value (which shouldn't
be considered for 'min-width:auto' anyway) -->
<div class="flexbox">
<img style="flex-basis: 100px" src="support/solidblue.png" alt="blue square">
</div>
<!-- ...and now with a smaller explicit 'flex-basis' value (which shouldn't
be considered for 'min-width:auto' anyway) -->
<div class="flexbox">
<img style="flex-basis: 10px" src="support/solidblue.png" alt="blue square">
</div>
</body>
</html>