52 lines
1.4 KiB
TypeScript
52 lines
1.4 KiB
TypeScript
import { createEffect, createSignal } from "solid-js";
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export function ReadProgressBar() {
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const articleContentElement: HTMLElement | null =
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document.getElementById("article-content");
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if (!articleContentElement) return null;
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const [width, setWidth] = createSignal("0%");
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const handleScroll = () => {
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const articleHeight = articleContentElement.scrollHeight;
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const topPosition = articleContentElement.getBoundingClientRect().top;
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const windowHeight = window.innerHeight;
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if (articleHeight <= windowHeight) {
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setWidth("100%");
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return;
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}
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const elementScrollTop = -topPosition;
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const scrollableHeight = articleHeight - windowHeight;
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const percentage = (elementScrollTop / scrollableHeight) * 100;
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const clampedPercentage = Math.max(0, Math.min(100, percentage));
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setWidth(`${clampedPercentage}%`);
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};
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createEffect(() => {
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window.addEventListener("scroll", handleScroll);
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window.addEventListener("resize", handleScroll);
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handleScroll();
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return () => {
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window.removeEventListener("scroll", handleScroll);
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window.removeEventListener("resize", handleScroll);
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};
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});
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return (
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<div
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aria-hidden="true"
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class="fixed inset-x-0 bottom-0 lg:top-0 z-50 h-1 w-full bg-violet-50 pointer-events-none"
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>
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<div
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class="bg-violet-300 h-full transition-all duration-300 ease-out"
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style={{ width: width() }}
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/>
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</div>
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);
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}
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