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<!DOCTYPE html>
<title>IntersectionObserver observing an SVG <rect> with fractional bounds element</title>
<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>
.spacer {
height: calc(100vh + 100px);
}
</style>
<div class="spacer"></div>
<svg viewBox="0 0 200 100" width="4" display="block">
<rect id="target" x="50" y="5" width="100" height="50" fill="blue"/>
</svg>
<div class="spacer"></div>
<script>
const viewportWidth = document.documentElement.clientWidth;
const viewportHeight = document.documentElement.clientHeight;
setup(() => {
window.entries = [];
window.target = document.getElementById("target");
window.targetRect = target.getBoundingClientRect();
});
var epsilon = 0.0001;
runTestCycle(function() {
assert_true(!!target, "target exists");
const 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, "Initial Observation");
});
function step0() {
document.scrollingElement.scrollTop = 300;
runTestCycle(step1, "Intersection observation after scrolling 300");
// The numbers in brackets are target client rect; intersection rect;
// and root bounds.
checkLastEntry(entries, 0, [
// the 8 pixels comes from the html body padding.
1 + 8, 1 + 8 + targetRect.width, 8 + viewportHeight + 100 + 0.1, viewportHeight + 100 + 0.1 + 8 + targetRect.height,
0, 0, 0, 0,
0, viewportWidth, 0, viewportHeight,
false,
], epsilon);
}
function step1() {
document.scrollingElement.scrollTop = 100;
runTestCycle(step2, "Intersection observation after scrolling 100");
checkLastEntry(entries, 1, [
1 + 8, 1 + 8 + targetRect.width, 8 + viewportHeight - 200 + 0.1, viewportHeight - 200 + 0.1 + 8 + targetRect.height,
1 + 8, 1 + 8 + targetRect.width, 8 + viewportHeight - 200 + 0.1, viewportHeight - 200 + 0.1 + 8 + targetRect.height,
0, viewportWidth, 0, viewportHeight,
true,
], epsilon);
}
function step2() {
document.scrollingElement.scrollTop = 0;
checkLastEntry(entries, 2, [
1 + 8, 1 + 8 + targetRect.width, 8 + viewportHeight + 0.1, viewportHeight + 0.1 + 8 + targetRect.height,
0, 0, 0, 0,
0, viewportWidth, 0, viewportHeight,
false,
], epsilon);
}
</script>
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