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<!DOCTYPE html>
<title>Hit test coplanar elements</title>
<link rel="help" href="https://drafts.csswg.org/cssom-view/#dom-document-elementfrompoint">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style type="text/css" media="screen">
body {
margin: 0;
}
.test {
display: inline-block;
height: 300px;
width: 300px;
margin: 20px;
}
.container {
position: relative;
height: 260px;
width: 260px;
margin: 20px;
}
.box {
position: absolute;
top: 20px;
left: 30px;
height: 100px;
width: 200px;
transform: translateZ(20px);
}
#box1 {
background-color: #DDD;
}
#box2 {
background-color: #CCC;
}
#box3 {
background-color: #BBB;
top: 60px;
}
#box4 {
background-color: #AAA;
top: 100px;
}
</style>
<body>
<div class="test">
<div class="container" id="box1">
<div class="box" id="box2"></div>
<div class="box" id="box3"></div>
<div class="box" id="box4"></div>
</div>
</div>
</body>
<script>
class Point {
constructor(x, y) {
this.x = x;
this.y = y;
}
};
const tests = [{
expectedElemId: 'box1',
points: [
new Point(59, 52),
new Point(278, 59),
new Point(58, 260),
new Point(281, 269),
],
},
{
expectedElemId: 'box2',
points: [
new Point(82, 68),
new Point(109, 80),
new Point(189, 71),
new Point(268, 98)
],
},
{
expectedElemId: 'box3',
points: [
new Point(73, 101),
new Point(128, 136),
new Point(206, 102),
new Point(268, 138),
]
},
{
expectedElemId: 'box4',
points: [
new Point(73, 144),
new Point(72, 232),
new Point(265, 146),
new Point(264, 232),
]
},
];
tests.forEach(testcase => {
test(t => {
const expectedElem = document.getElementById(testcase.expectedElemId);
for (const point of testcase.points) {
const hitElem = document.elementFromPoint(point.x, point.y);
assert_equals(hitElem, expectedElem,
`point (${point.x}, ${point.y}) is inside element ${testcase.expectedElemId}`);
}
}, `${document.title}, hittesting ${testcase.expectedElemId})`);
});
</script>
</html>
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