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22 lines
825 B
JavaScript
22 lines
825 B
JavaScript
// Create a function that will handle any intersection between some elements and the viewport.
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const handleHeaderIntersection = function (entries) {
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entries.forEach(entry => {
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if (entry.isIntersecting) {
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msgConsole('IntersectionObserver','The header is visible in the viewport');
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if (typeof headerIsNowVisible === 'function') headerIsNowVisible(entry);
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} else {
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msgConsole('IntersectionObserver','The header is invisible in the viewport');
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if (typeof headerIsNowInvisible === 'function') headerIsNowInvisible(entry);
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}
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});
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}
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const section_header = document.querySelector("header");
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if (section_header) {
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const headerObserver = new IntersectionObserver(handleHeaderIntersection);
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if (headerObserver) headerObserver.observe(section_header);
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} else myLog('No header to observe');
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