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https://github.com/notion-enhancer/notion-enhancer.git
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44 lines
1.6 KiB
JavaScript
44 lines
1.6 KiB
JavaScript
/*
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* notion-enhancer: scroll to top
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* (c) 2021 CloudHill <rl.cloudhill@gmail.com> (https://github.com/CloudHill)
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* (c) 2021 dragonwocky <thedragonring.bod@gmail.com> (https://dragonwocky.me/)
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* (https://notion-enhancer.github.io/) under the MIT license
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*/
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'use strict';
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export default async function ({ web, components }, db) {
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const scrollStyle = (await db.get(['smooth'])) ? 'smooth' : 'auto',
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$scrollButton = await components.addCornerAction(
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await components.feather('chevron-up'),
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() => {
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document.querySelector('.notion-frame > .notion-scroller').scroll({
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top: 0,
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left: 0,
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behavior: scrollStyle,
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});
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}
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);
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let $scroller;
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const topDistancePx = +(await db.get(['top_distance_px'])),
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topDistancePercent = 0.01 * (await db.get(['top_distance_percent'])),
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adjustButtonVisibility = async (event) => {
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if (!$scroller) return;
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$scrollButton.classList.add('hidden');
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const scrolledDistance =
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$scroller.scrollTop >= topDistancePx ||
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$scroller.scrollTop >=
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($scroller.scrollHeight - $scroller.clientHeight) * topDistancePercent;
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if (scrolledDistance) $scrollButton.classList.remove('hidden');
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};
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web.addDocumentObserver(() => {
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$scroller = document.querySelector('.notion-frame > .notion-scroller');
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$scroller.removeEventListener('scroll', adjustButtonVisibility);
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$scroller.addEventListener('scroll', adjustButtonVisibility);
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}, ['.notion-frame > .notion-scroller']);
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adjustButtonVisibility();
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if (topDistancePx && topDistancePercent) $scrollButton.classList.add('hidden');
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}
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