54 lines
2 KiB
HTML
54 lines
2 KiB
HTML
<!DOCTYPE html>
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<title>IntersectionObserver observing an SVG container element changing position</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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<svg width="400" height="10000">
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<!-- Ensure the svg bounds are unchanged with a white fill -->
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<rect x="-5000" y="-5000" width="100000" height="100000" fill="white"/>
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<svg id="target" x="0" y="100vh" width="100px" height="100px">
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<rect x="0" y="0" width="100" height="100" fill="green"/>
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</svg>
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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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const kEpsilon = 1; // clientHeight and clientWidth are rounded if the viewport is fractional.
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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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});
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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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target.setAttribute('y', '0');
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runTestCycle(step1, "Change inner svg element")
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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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// the 8 pixels comes from the html body padding.
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8, 8 + targetRect.width, viewportHeight+8, viewportHeight+8 + 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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], kEpsilon);
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}
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function step1() {
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checkLastEntry(entries, 1, [
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8, 8 + targetRect.width, 8, 8 + targetRect.height,
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8, 8 + targetRect.width, 8, 8 + targetRect.height,
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0, viewportWidth, 0, viewportHeight,
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true,
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], kEpsilon);
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}
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</script>
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