27 lines
720 B
JavaScript
27 lines
720 B
JavaScript
function handleScrollButonDisplay() {
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const scrollerTop = document.querySelector('#scroller-top');
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if (
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document.body.scrollTop > window.innerHeight / 2 ||
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document.documentElement.scrollTop > window.innerHeight / 2
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) {
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scrollerTop.removeAttribute('aria-hidden');
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} else {
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scrollerTop.setAttribute('aria-hidden', 'true');
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}
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}
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function scrollTop() {
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window.scrollTo({
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top: 0,
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behavior: 'smooth',
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});
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}
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export default function scrollerTopInit() {
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const scrollerTop = document.querySelector('#scroller-top');
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if (!scrollerTop) return;
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window.addEventListener('scroll', handleScrollButonDisplay);
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scrollerTop.addEventListener('click', scrollTop);
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}
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