css3/flexbox/auto-height-dynamic.html

<!DOCTYPE html>
<html>
<style>
.flexbox {
    width: 600px;
    display: -webkit-flex;
    background-color: #aaa;
    position: relative;
    -webkit-flex-flow: column;
}
.flexbox :nth-child(1) {
    background-color: blue;
}
</style>
<script>
if (window.testRunner)
    testRunner.dumpAsText();
</script>
<script src="../../resources/check-layout.js"></script>
<body onload="checkLayout('.flexbox')">

<div class="flexbox" data-expected-height=0>
    <div class="flexitem" data-expected-height=0 style="-webkit-flex: 100px"></div>
</div>

<div class="flexbox" data-expected-height=0>
    <div class="flexitem2" data-expected-height=0 style="-webkit-flex: 100px"></div>
</div>

<script>
document.querySelector('.flexitem').offsetHeight;
document.querySelector('.flexitem2').offsetHeight;
document.querySelector('.flexitem').style.webkitFlex = "1";
document.querySelector('.flexitem2').style.webkitFlex = "1 auto";
</script>

</body>
</html>