72 lines
2.3 KiB
HTML
72 lines
2.3 KiB
HTML
<!DOCTYPE html>
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<title>IntersectionObserver observing an SVG <g> element</title>
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<meta name="viewport" content="width=device-width,initial-scale=1">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="resources/intersection-observer-test-utils.js"></script>
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<style>
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.spacer {
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height: calc(100vh + 100px);
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}
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</style>
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<svg viewBox="0 0 200 100" width="400">
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<g id="target">
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<rect x="50" y="25" width="100" height="50" fill="blue"/>
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</g>
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</svg>
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<script>
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const viewportWidth = document.documentElement.clientWidth;
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const viewportHeight = document.documentElement.clientHeight;
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setup(() => {
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window.entries = [];
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window.target = document.getElementById("target");
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window.targetRect = target.getBoundingClientRect();
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window.rect = document.querySelector("#target > rect");
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});
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runTestCycle(function() {
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assert_true(!!target, "target exists");
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const observer = new IntersectionObserver(function(changes) {
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entries = entries.concat(changes);
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});
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observer.observe(target);
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entries = entries.concat(observer.takeRecords());
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assert_equals(entries.length, 0, "No initial notifications");
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runTestCycle(step0, "First rAF.");
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});
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function step0() {
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rect.style.transform = "translate(0, 150px)";
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runTestCycle(step1, "descendant rect translated down by 150 units (out of SVG viewport)");
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// The numbers in brackets are target client rect; intersection rect;
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// and root bounds.
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checkLastEntry(entries, 0, [
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108, 108 + targetRect.width, 58, 58 + targetRect.height,
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108, 108 + targetRect.width, 58, 58 + targetRect.height,
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0, viewportWidth, 0, viewportHeight,
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true,
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]);
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}
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function step1() {
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rect.style.transform = "translate(0, 50px)";
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runTestCycle(step2, "descendant rect translated down by 100 units");
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checkLastEntry(entries, 1, [
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108, 108 + targetRect.width, 8 + (25 + 150) * 2, 8 + (25 + 150) * 2 + targetRect.height,
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0, 0, 0, 0,
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0, viewportWidth, 0, viewportHeight,
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false,
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]);
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}
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function step2() {
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rect.style.transform = "";
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checkLastEntry(entries, 2, [
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108, 108 + targetRect.width, 8 + (25 + 50) * 2, 8 + (25 + 50) * 2 + targetRect.height,
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108, 108 + targetRect.width, 8 + (25 + 50) * 2, 8 + (25 + 50) * 2 + targetRect.height / 2,
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0, viewportWidth, 0, viewportHeight,
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true,
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]);
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}
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</script>
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