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display-none.html
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display-none.html
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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;
}
#target {
background-color: green;
width: 100px;
height: 100px;
}
</style>
<div id="target"></div>
<script>
var vw = document.documentElement.clientWidth;
var vh = document.documentElement.clientHeight;
var entries = [];
runTestCycle(function() {
var target = document.getElementById("target");
var root = document.getElementById("root");
var observer = new IntersectionObserver(function(changes) {
entries = entries.concat(changes)
});
observer.observe(target);
entries = entries.concat(observer.takeRecords());
assert_equals(entries.length, 0, "No initial notifications.");
runTestCycle(step0, "Intersecting notification after first rAF.");
}, "IntersectionObserver should send a not-intersecting notification for a target that gets display:none.");
function step0() {
runTestCycle(step1, "Not-intersecting notification after setting display:none on target.");
checkLastEntry(entries, 0, [8, 108, 8, 108, 8, 108, 8, 108, 0, vw, 0, vh, true]);
target.style.display = "none";
}
function step1() {
runTestCycle(step2, "Intersecting notification after removing display:none on target.");
checkLastEntry(entries, 1, [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, false]);
target.style.display = "";
}
function step2() {
checkLastEntry(entries, 2, [8, 108, 8, 108, 8, 108, 8, 108, 0, vw, 0, vh, true]);
}
</script>