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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 {
display: inline-block;
width: 100px;
height: 100px;
background-color: green;
}
.vertical-spacer {
height: calc(100vh + 100px);
}
.horizontal-spacer {
display: inline-block;
width: 120vw;
}
</style>
<div class="vertical-spacer"></div>
<div style="white-space:nowrap;">
<div class="horizontal-spacer"></div>
<div id="target"></div>
<div class="horizontal-spacer"></div>
</div>
<div class="vertical-spacer"></div>
<script>
var vw = document.documentElement.clientWidth;
var vh = document.documentElement.clientHeight;
var entries = [];
var target;
runTestCycle(function() {
target = document.getElementById("target");
assert_true(!!target, "Target exists");
var observer = new IntersectionObserver(function(changes) {
entries = entries.concat(changes)
}, { rootMargin: "10px 20% 40% 30px" });
observer.observe(target);
entries = entries.concat(observer.takeRecords());
assert_equals(entries.length, 0, "No initial notifications.");
runTestCycle(step0, "First rAF.");
}, "Root margin tests");
function step0() {
var targetBounds = clientBounds(target);
document.scrollingElement.scrollLeft = 100;
runTestCycle(step1, "document.scrollingElement.scrollLeft = 100");
checkLastEntry(entries, 0, targetBounds.concat(0, 0, 0, 0, -30, vw * 1.2, -10, vh * 1.4, false));
}
function step1() {
var targetBounds = clientBounds(target);
var sw = window.innerWidth - document.documentElement.clientWidth;
var sh = window.innerHeight - document.documentElement.clientHeight;
document.scrollingElement.scrollTop = vh + 200;
runTestCycle(step2, "document.scrollingElement.scrollTop = document.documentElement.clientHeight + 200");
checkLastEntry(entries, 1, targetBounds.concat(
targetBounds[0], Math.min(targetBounds[1], vw * 1.2), vh + 108 + sh, Math.min(vh + 208 + sw, vh * 1.4),
-30, vw * 1.2, -10, vh * 1.4,
true
));
}
function step2() {
document.scrollingElement.scrollTop = vh + 300;
runTestCycle(step3, "document.scrollingElement.scrollTop = document.documentElement.clientHeight + 300");
checkLastEntry(entries, 1);
}
function step3() {
var targetBounds = clientBounds(target);
document.scrollingElement.scrollLeft = 0;
document.scrollingElement.scrollTop = 0;
checkLastEntry(entries, 2, targetBounds.concat(0, 0, 0, 0, -30, vw * 1.2, -10, vh * 1.4, false));
}
</script>
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