mirror of
https://github.com/koel/koel
synced 2024-12-20 01:23:16 +00:00
19 lines
661 B
TypeScript
19 lines
661 B
TypeScript
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import { Directive } from 'vue'
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const toggleClasses = (el: HTMLElement) => {
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el.classList.toggle('fade-top', el.scrollTop !== 0)
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el.classList.toggle('fade-bottom', el.scrollTop + el.clientHeight !== el.scrollHeight)
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}
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const observeVisibility = (el: HTMLElement, callback: Closure) => {
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const observer = new IntersectionObserver(entries => entries.forEach(entry => entry.isIntersecting && callback()))
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observer.observe(el)
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}
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export const overflowFade: Directive = {
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mounted: async (el: HTMLElement) => {
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observeVisibility(el, () => toggleClasses(el))
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el.addEventListener('scroll', () => requestAnimationFrame(() => toggleClasses(el)))
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}
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}
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