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<!DOCTYPE html>
<meta charset="utf-8">
<link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
<link rel="author" title="Mozilla" href="https://www.mozilla.org/">
<link rel="help" href="https://drafts.csswg.org/css-sizing-3/#intrinsic-sizes">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1748339">
<link rel="match" href="../reference/ref-filled-green-100px-square-only.html">
<style>
.outer {
/* This is just to make the percent values resolve to something
predictable, and not browser-viewport-size-dependent. */
width: 500px;
}
.abspos-cb {
position: relative;
height: 0;
width: 0;
/* This element's padding-box ends up 90px-by-90px, calculated as 9% of the
.outer elements's 500px width (9% * 500px = 45px) on all four sides (top,
left, right, and bottom). This padding-box serves as the containing block
for the abspos flex container, and its size should be considered definite,
since the percentage-based padding has a definite percentage basis to
resolve against. So, all the percentage heights down the descendant-chain
(all the way down to the canvas) should be considered definite as well, and
that should contribute to canvas's intrinsic width contribution
(transferring via its aspect-ratio) when the flex item resolves its
'flex-basis:content'. */
padding: 9%;
border: 5px solid green;
}
.flex-container {
height: 100%;
width: 100%;
position: absolute;
display: flex;
border: 5px solid green;
box-sizing: border-box;
top: 0;
left: 0;
}
.item {
border: 5px solid green;
height: 100%;
/* width unset */
flex-basis: content;
box-sizing: border-box;
}
canvas {
width: 100%;
height: 100%;
border: 5px solid green;
background: green;
box-sizing: border-box;
}
</style>
<p>Test passes if there is a filled green square.</p>
<div class="outer">
<div class="abspos-cb">
<div class="flex-container">
<div class="item">
<canvas width="10" height="10"></canvas>
</div>
</div>
</div>
</div>
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