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<!DOCTYPE html>
<meta name="viewport" content="width=device-width,initial-scale=1">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../resources/intersection-observer-test-utils.js"></script>
<style>
pre, #log {
position: absolute;
top: 0;
left: 200px;
}
iframe {
width: 300px;
height: 150px;
border: none;
}
#occluder {
will-change: transform;
width: 100px;
height: 100px;
background-color: green;
}
</style>
<iframe src="http://{{domains[www1]}}:{{ports[http][0]}}/intersection-observer/resources/v2-subframe.html"></iframe>
<div id="occluder"></div>
<script>
async_test(function(t) {
let iframe = document.querySelector("iframe");
let occluder = document.getElementById("occluder");
function step0(event) {
assert_equals(event.data,"");
}
function step1(event) {
occluder.style.marginTop = "-150px";
assert_equals(JSON.stringify(event.data),
JSON.stringify([true]));
}
function step2(event) {
occluder.style.marginTop = "";
assert_equals(JSON.stringify(event.data),
JSON.stringify([false]));
}
function step3(event) {
assert_equals(JSON.stringify(event.data),
JSON.stringify([true]));
}
let steps = [step0, step1, step2, step3];
window.addEventListener("message", event => {
if (steps.length) {
t.step(steps.shift(), t, event);
waitForFrame(t, () => {
iframe.contentWindow.postMessage("", "*");
});
} else {
t.done();
}
});
}, "Intersection observer V2 test with occlusion of target in iframe.");
</script>
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