css/css-flexbox/abspos/position-absolute-002.html

<!DOCTYPE html>
<html>
<title>CSS Test: Absolutely positioned children of flexboxes</title>
<link href="../support/flexbox.css" rel="stylesheet">
<link rel="author" title="Google Inc." href="http://www.google.com/">
<link rel="help" href="https://drafts.csswg.org/css-flexbox/#abspos-items">
<meta name="flags" content="dom">
<meta name="assert" content="Checks that we correctly position abspos children
with different alignments and dynamic changes">
<style>
body {
    margin: 0;
}
.flexbox {
    background-color: green;
    height: 100px;
    width: 100px;
    margin: 10px;
}
.flexbox > * {
    flex: none;
}
.relative {
    position: relative;
}
.flexbox > div {
    width: 20px;
    height: 20px;
}
.absolute {
    position: absolute;
}
#placed-absolute {
    top: 20px;
    left: 20px;
}

.rtl {
    direction: rtl;
}
.ltr {
    direction: ltr;
}

.flexbox :nth-child(1) {
    background-color: blue;
}
.flexbox :nth-child(2) {
    background-color: yellow;
}
.flexbox :nth-child(3) {
    background-color: salmon;
}
.flexbox :nth-child(4) {
    background-color: grey;
}
.flexbox :nth-child(5) {
    background-color: red;
}
.flexbox :nth-child(6) {
    background-color: orange;
}
.flexbox :nth-child(7) {
    background-color: purple;
}
</style>

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>

<body onload="checkLayout('.flexbox')">
<div id=log></div>

<div class='flexbox relative align-items-center'>
    <div id='placed-absolute' class='absolute' data-offset-x=20 data-offset-y=20></div>
</div>

<div class='flexbox relative align-items-center'>
    <div data-offset-x=0 data-offset-y=40></div>
    <div class='absolute' data-offset-x=0 data-offset-y=40></div>
    <div data-offset-x=20 data-offset-y=40></div>
    <div class="absolute" style="top: 5px; left: 5px" data-offset-x=5 data-offset-y=5></div>
</div>

<div class="relative">
<div class='flexbox align-items-center'>
    <div data-offset-x=10 data-offset-y=40></div>
    <div class='absolute' data-offset-x=10 data-offset-y=40></div>
    <div data-offset-x=30 data-offset-y=40></div>
    <div class="absolute" style="top: 5px; left: 5px" data-offset-x=5 data-offset-y=5></div>
</div>
</div>

<div class='flexbox relative column rtl'>
    <div data-offset-x=80 data-offset-y=0></div>
    <div class='absolute' data-offset-x=80 data-offset-y=0></div>
    <div data-offset-x=80 data-offset-y=20></div>
    <div class="absolute" style="top: 5px; left: 5px" data-offset-x=5 data-offset-y=5></div>
</div>

<div class="relative">
<div class='flexbox wrap-reverse'>
    <div style="width:90px" data-offset-x=10 data-offset-y=80></div>
    <div class="absolute" data-offset-x=10 data-offset-y=80></div>
    <div data-offset-x=10 data-offset-y=30></div>
    <div class="absolute" data-offset-x=10 data-offset-y=80></div>
    <div data-offset-x=30 data-offset-y=30></div>
    <div class="absolute" data-offset-x=10 data-offset-y=80></div>
    <div class="absolute" style="top: 5px; left: 5px" data-offset-x=5 data-offset-y=5></div>
</div>
</div>

<div class='flexbox relative'>
    <div style="margin: auto;" data-offset-x=40 data-offset-y=40></div>
    <div class="absolute" style="margin: auto;" data-offset-x=0 data-offset-y=0></div>
    <div class="absolute" style="margin: auto;" data-offset-x=0 data-offset-y=0></div>
    <div class="absolute" style="margin: auto; top: 5px; left: 5px" data-offset-x=5 data-offset-y=5></div>
</div>

<div class='flexbox align-items-stretch relative'>
    <div style="height: auto" data-offset-x=0 data-offset-y=0 data-expected-height=100></div>
    <div class="absolute" style="height: auto" data-offset-x=0 data-offset-y=0 data-expected-height=0></div>
    <div class="absolute" style="height: auto; top: 5px; left: 5px" data-offset-x=5 data-offset-y=5 data-expected-height=0></div>
</div>

<div class="flexbox wrap relative">
  <div style="width: 100px;" data-offset-x=0 data-offset-y=0></div>
  <div class="absolute" data-offset-x=0 data-offset-y=0></div>
  <div style="width: 50px;" data-offset-x=0 data-offset-y=50></div>
  <div class="absolute" data-offset-x=0 data-offset-y=0></div>
  <div style="width: 50px;" data-offset-x=50 data-offset-y=50></div>
  <div class="absolute" data-offset-x=0 data-offset-y=0></div>
</div>

<div class="flexbox wrap relative align-items-flex-end">
  <div style="width: 100px;" data-offset-x=0 data-offset-y=30></div>
  <div class="absolute" data-offset-x=0 data-offset-y=80></div>
  <div style="width: 50px;" data-offset-x=0 data-offset-y=80></div>
  <div class="absolute" data-offset-x=0 data-offset-y=80></div>
  <div style="width: 50px;" data-offset-x=50 data-offset-y=80></div>
  <div class="absolute" data-offset-x=0 data-offset-y=80></div>
</div>


<script>
var absolute = document.getElementById('placed-absolute');
var beforePosition = absolute.getBoundingClientRect();
document.querySelector('.flexbox').style.height = '101px';
var afterPosition = absolute.getBoundingClientRect();

// Positioned element should not change position when the height of it's parent flexbox is changed.
for (key in beforePosition) {
    test(function() {
        assert_equals(beforePosition[key], afterPosition[key]);
    }, 'position of ' + key);
}
</script>
</body>
</html>