49 lines
1.2 KiB
TypeScript
49 lines
1.2 KiB
TypeScript
import { JSX } from "preact"
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import { randomIdNonSecure } from "../util/random"
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const OverflowList = ({
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children,
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...props
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}: JSX.HTMLAttributes<HTMLUListElement> & { id: string }) => {
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return (
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<ul {...props} class={[props.class, "overflow"].filter(Boolean).join(" ")} id={props.id}>
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{children}
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<li class="overflow-end" />
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</ul>
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)
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}
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export default () => {
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const id = randomIdNonSecure()
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return {
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OverflowList: (props: JSX.HTMLAttributes<HTMLUListElement>) => (
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<OverflowList {...props} id={id} />
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),
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overflowListAfterDOMLoaded: `
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document.addEventListener("nav", (e) => {
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const observer = new IntersectionObserver((entries) => {
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for (const entry of entries) {
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const parentUl = entry.target.parentElement
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if (!parentUl) return
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if (entry.isIntersecting) {
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parentUl.classList.remove("gradient-active")
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} else {
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parentUl.classList.add("gradient-active")
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}
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}
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})
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const ul = document.getElementById("${id}")
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if (!ul) return
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const end = ul.querySelector(".overflow-end")
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if (!end) return
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observer.observe(end)
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window.addCleanup(() => observer.disconnect())
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})
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`,
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}
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}
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