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<!DOCTYPE html>
<html class="reftest-wait">
<link rel="author" title="Google LLC" href="http://www.google.com" />
<link rel="help" href="https://drafts.csswg.org/css-flexbox/#line-sizing" />
<title>css-flexbox: Tests that we use the aspect ratio to compute the main size when there is a definite cross size and a specified but indefinite flex-basis</title>
<link rel="match" href="../reference/ref-filled-green-100px-square.xht" />
<style>
#reference-overlapped-red {
position: absolute;
background-color: red;
width: 100px;
height: 100px;
z-index: -1;
}
.flex {
display: flex;
flex-direction: column;
justify-content: flex-start;
align-items: flex-start;
float: left;
}
img {
flex: 0 0 0%;
height: 500px;
min-width: 0;
min-height: 0; /* Disable min-size: auto so we don't have to think about it. */
width: 40px;
}
</style>
<script>
// Force a relayout after the image loads to work around http://crbug.com/1042329
window.onload = (event) => {
flex.style.width = "50px";
flex.offsetTop;
flex.style.width = "auto";
flex.offsetTop;
document.documentElement.classList.remove("reftest-wait")
}
</script>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="reference-overlapped-red"></div>
<div style="width:60px; height: 100px; background: green; float: left;"></div>
<div class="flex" id=flex>
<img src="support/20x50-green.png">
</div>
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