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<title>CSS Test: Testing min-width:auto</title>
<link href="mailto:dholbert@mozilla.com" rel="author" title="Daniel Holbert" />
<link href="http://www.w3.org/TR/css-flexbox-1/#min-size-auto" rel="help" />
<link href="reference/flexbox-min-width-auto-001-ref.xht" rel="match" />
<!--
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
(a), (b), or (c) above. Another test will check (d).
-->
<style>
.flexbox {
display: flex;
width: 1px; /* 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;
}
.flexbox > * > * {
/* Flex items' contents are gray & fixed-size: */
background: gray;
height: 10px;
width: 80px;
}
</style>
</head>
<body>
<!-- Check for min-width:auto resolving correctly when the smallest
candidate value is: -->
<!-- *** (a) Used 'flex-basis' (from 'width') *** -->
<!-- First, without definite max-width: -->
<div class="flexbox">
<div style="width: 50px"><div></div></div>
</div>
<!-- ...and now with definite (& large) 'max-width': -->
<div class="flexbox">
<div style="width: 50px; max-width: 120px;"><div></div></div>
</div>
<!-- ...and now with used 'flex-basis' being a calc expression:-->
<div class="flexbox">
<div style="width: calc(10% + 50px)"><div></div></div>
</div>
<!-- *** (b) The computed 'max-width' *** -->
<!-- First, with a larger candidate 'flex-basis' value (from 'width') -->
<div class="flexbox">
<div style="width: 100px; max-width:50px"><div></div></div>
</div>
<!-- ...and now with a larger explicit 'flex-basis' value (which shouldn't
be considered for 'min-width:auto' anyway) -->
<div class="flexbox">
<div style="flex-basis: 100px; max-width:50px"><div></div></div>
</div>
<!-- ...and now with a smaller explicit 'flex-basis' value (which shouldn't
be considered for 'min-width:auto' anyway) -->
<div class="flexbox">
<div style="flex-basis: 10px; max-width:50px"><div></div></div>
</div>
<!-- *** (c) (no intrinsic aspect ratio) The min-content size *** -->
<!-- First, with a larger candidate 'flex-basis' value (from 'width') -->
<div class="flexbox">
<div style="width: 100px"><div></div></div>
</div>
<!-- ...and now with a larger explicit 'flex-basis' value (which shouldn't
be considered for 'min-width:auto' anyway) -->
<div class="flexbox">
<div style="flex-basis: 100px"><div></div></div>
</div>
<!-- ...and now with a smaller explicit 'flex-basis' value (which shouldn't
be considered for 'min-width:auto' anyway) -->
<div class="flexbox">
<div style="flex-basis: 10px"><div></div></div>
</div>
</body></html>