blob: d96f6d1f09007dd2a565cce24a2a26bd3d7bb260 [file] [log] [blame]
<!DOCTYPE html>
<script src="../resources/js-test.js"></script>
<script src="helper-functions.js"></script>
<div style="width:100%; height:700px;"></div>
<div id="root" style="display: inline-block; overflow-y: scroll; height: 200px; border: 3px solid black">
<div style="width:100px; height: 300px;"></div>
<div id="target" style="background-color: green; width:100px; height:100px"></div>
</div>
<div style="width:100%;height:700px;"></div>
<script>
description("Simple intersection observer test with explicit root and target in the same document.");
var target = document.getElementById("target");
var root = document.getElementById("root");
var entries = [];
observer_callback = function(changes) {
for (var i in changes)
entries.push(changes[i]);
};
var observer = new IntersectionObserver(observer_callback, {"root": document.getElementById("root")});
observer.observe(target);
// Test that notifications are not generated when the target is overflow clipped by the root.
function step0() {
setTimeout(function() {
shouldBeEqualToNumber("entries.length", 0);
document.scrollingElement.scrollTop = 600;
requestAnimationFrame(step1);
});
}
function step1() {
setTimeout(function() {
shouldBeEqualToNumber("entries.length", 0);
root.scrollTop = 150;
requestAnimationFrame(step2);
});
}
function step2() {
setTimeout(function() {
shouldBeEqualToNumber("entries.length", 1);
shouldBeEqualToNumber("entries[0].boundingClientRect.left", 11);
shouldBeEqualToNumber("entries[0].boundingClientRect.right", 111);
shouldBeEqualToNumber("entries[0].boundingClientRect.top", 261);
shouldBeEqualToNumber("entries[0].boundingClientRect.bottom", 361);
shouldBeEqualToNumber("entries[0].intersectionRect.left", 11);
shouldBeEqualToNumber("entries[0].intersectionRect.right", 111);
shouldBeEqualToNumber("entries[0].intersectionRect.top", 261);
shouldBeEqualToNumber("entries[0].intersectionRect.bottom", 311);
shouldBeEqualToNumber("entries[0].rootBounds.left", 11);
shouldBeEqualToNumber("entries[0].rootBounds.right", 111);
shouldBeEqualToNumber("entries[0].rootBounds.top", 111);
shouldBeEqualToNumber("entries[0].rootBounds.bottom", 311);
shouldEvaluateToSameObject("entries[0].target", target);
document.scrollingElement.scrollTop = 0;
requestAnimationFrame(step3);
});
}
function step3() {
setTimeout(function() {
shouldBeEqualToNumber("entries.length", 1);
root.scrollTop = 0;
requestAnimationFrame(step4);
});
}
function step4() {
setTimeout(function() {
shouldBeEqualToNumber("entries.length", 2);
shouldBeEqualToNumber("entries[1].boundingClientRect.left", 11);
shouldBeEqualToNumber("entries[1].boundingClientRect.right", 111);
shouldBeEqualToNumber("entries[1].boundingClientRect.top", 1011);
shouldBeEqualToNumber("entries[1].boundingClientRect.bottom", 1111);
shouldBeEqualToNumber("entries[1].intersectionRect.left", 0);
shouldBeEqualToNumber("entries[1].intersectionRect.right", 0);
shouldBeEqualToNumber("entries[1].intersectionRect.top", 0);
shouldBeEqualToNumber("entries[1].intersectionRect.bottom", 0);
shouldBeEqualToNumber("entries[1].rootBounds.left", 11);
shouldBeEqualToNumber("entries[1].rootBounds.right", 111);
shouldBeEqualToNumber("entries[1].rootBounds.top", 711);
shouldBeEqualToNumber("entries[1].rootBounds.bottom", 911);
shouldEvaluateToSameObject("entries[1].target", target);
root.scrollTop = 150;
requestAnimationFrame(step5);
});
}
// This tests that notifications are generated even when the root element is off screen.
function step5() {
setTimeout(function() {
shouldBeEqualToNumber("entries.length", 3);
shouldBeEqualToNumber("entries[2].boundingClientRect.left", 11);
shouldBeEqualToNumber("entries[2].boundingClientRect.right", 111);
shouldBeEqualToNumber("entries[2].boundingClientRect.top", 861);
shouldBeEqualToNumber("entries[2].boundingClientRect.bottom", 961);
shouldBeEqualToNumber("entries[2].intersectionRect.left", 11);
shouldBeEqualToNumber("entries[2].intersectionRect.right", 111);
shouldBeEqualToNumber("entries[2].intersectionRect.top", 861);
shouldBeEqualToNumber("entries[2].intersectionRect.bottom", 911);
shouldBeEqualToNumber("entries[2].rootBounds.left", 11);
shouldBeEqualToNumber("entries[2].rootBounds.right", 111);
shouldBeEqualToNumber("entries[2].rootBounds.top", 711);
shouldBeEqualToNumber("entries[2].rootBounds.bottom", 911);
shouldEvaluateToSameObject("entries[2].target", target);
finishJSTest();
});
}
step0();
</script>