koel/resources/assets/js/directives/overflowFade.ts
2024-10-14 00:37:01 +07:00

14 lines
555 B
TypeScript

import type { Directive } from 'vue'
import { useIntersectionObserver } from '@vueuse/core'
const toggleClasses = (el: HTMLElement) => {
el.classList.toggle('fade-top', el.scrollTop !== 0)
el.classList.toggle('fade-bottom', el.scrollTop + el.clientHeight !== el.scrollHeight)
}
export const overflowFade: Directive = {
mounted: async (el: HTMLElement) => {
useIntersectionObserver(el, ([{ isIntersecting }]) => isIntersecting && toggleClasses(el))
el.addEventListener('scroll', () => requestAnimationFrame(() => toggleClasses(el)))
},
}