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50 lines
1.3 KiB
HTML
50 lines
1.3 KiB
HTML
<!doctype html>
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<title>Inner document for use in iframes.sub.html test</title>
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<script>
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function isInView(element) {
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let rect = element.getBoundingClientRect();
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return rect.top >= 0 && rect.top <= window.innerHeight
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&& rect.left >= 0 && rect.left <= window.innerWidth;
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}
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function postResult() {
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let position = 'unknown';
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if (window.scrollY == 0)
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position = 'top';
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else if (isInView(document.getElementById('target')))
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position = 'target';
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else if (isInView(document.getElementById('elementid')))
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position = 'elementid';
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let results = {
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scrollPosition: position,
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href: window.location.href,
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};
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window.top.postMessage(results, "*");
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}
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window.addEventListener('message', (e) => {
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if (e.data == 'getResult') {
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// rAF twice in case there is any asynchronicity in scrolling to the
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// target.
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window.requestAnimationFrame(() => {
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window.requestAnimationFrame(postResult);
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})
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} else if (e.data == 'reset') {
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window.location.hash = '';
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window.scrollTo(0, 0);
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window.top.postMessage('', "*");
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}
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});
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</script>
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<style>
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p {
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margin-top: 400vh;
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margin-bottom: 400vh;
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}
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</style>
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<body>
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<p id="target">Target Text</p>
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<div id="elementid">DIV</div>
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</body>
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