1 files changed, 0 insertions, 155 deletions
diff --git a/packages/integrations/prefetch/src/client.ts b/packages/integrations/prefetch/src/client.ts
deleted file mode 100644
index dc05cb84b..000000000
--- a/packages/integrations/prefetch/src/client.ts
+++ /dev/null
@@ -1,155 +0,0 @@
-/// <reference types="../@types/network-information.d.ts" />
-import throttles from 'throttles';
-import requestIdleCallback from './requestIdleCallback.js';
-
-const events = ['mouseenter', 'touchstart', 'focus'];
-
-const preloaded = new Set<string>();
-const loadedStyles = new Set<string>();
-
-function shouldPreload({ href }: { href: string }) {
-	try {
-		const url = new URL(href);
-		return (
-			window.location.origin === url.origin &&
-			window.location.pathname !== url.pathname &&
-			!preloaded.has(href)
-		);
-	} catch {}
-
-	return false;
-}
-
-let parser: DOMParser;
-let observer: IntersectionObserver;
-
-function observe(link: HTMLAnchorElement) {
-	preloaded.add(link.href);
-	observer.observe(link);
-	events.map((event) => link.addEventListener(event, onLinkEvent, { passive: true, once: true }));
-}
-
-function unobserve(link: HTMLAnchorElement) {
-	observer.unobserve(link);
-	events.map((event) => link.removeEventListener(event, onLinkEvent));
-}
-
-function onLinkEvent({ target }: Event) {
-	if (!(target instanceof HTMLAnchorElement)) {
-		return;
-	}
-
-	preloadHref(target);
-}
-
-async function preloadHref(link: HTMLAnchorElement) {
-	unobserve(link);
-	const { href } = link;
-
-	try {
-		const contents = await fetch(href).then((res) => res.text());
-		parser ||= new DOMParser();
-
-		const html = parser.parseFromString(contents, 'text/html');
-		const styles = Array.from(html.querySelectorAll<HTMLLinkElement>('link[rel="stylesheet"]'));
-
-		await Promise.all(
-			styles
-				.filter((el) => !loadedStyles.has(el.href))
-				.map((el) => {
-					loadedStyles.add(el.href);
-					return fetch(el.href);
-				})
-		);
-	} catch {}
-}
-
-export interface PrefetchOptions {
-	/**
-	 * Element selector used to find all links on the page that should be prefetched.
-	 *
-	 * @default 'a[href][rel~="prefetch"]'
-	 */
-	selector?: string;
-	/**
-	 * The number of pages that can be prefetched concurrently.
-	 *
-	 * @default 1
-	 */
-	throttle?: number;
-	/**
-	 * Element selector used to find all links on the page that should be prefetched on user interaction.
-	 *
-	 * @default 'a[href][rel~="prefetch-intent"]'
-	 */
-	intentSelector?: string | string[];
-}
-
-export default function prefetch({
-	selector = 'a[href][rel~="prefetch"]',
-	throttle = 1,
-	intentSelector = 'a[href][rel~="prefetch-intent"]',
-}: PrefetchOptions) {
-	// If the navigator is offline, it is very unlikely that a request can be made successfully
-	if (!navigator.onLine) {
-		return Promise.reject(new Error('Cannot prefetch, no network connection'));
-	}
-
-	// `Navigator.connection` is an experimental API and is not supported in every browser.
-	if ('connection' in navigator) {
-		const connection = (navigator as any).connection;
-		// Don't prefetch if Save-Data is enabled.
-		if (connection.saveData) {
-			return Promise.reject(new Error('Cannot prefetch, Save-Data is enabled'));
-		}
-
-		// Do not prefetch if using 2G or 3G
-		if (/(2|3)g/.test(connection.effectiveType)) {
-			return Promise.reject(new Error('Cannot prefetch, network conditions are poor'));
-		}
-	}
-
-	const [toAdd, isDone] = throttles(throttle);
-
-	observer =
-		observer ||
-		new IntersectionObserver((entries) => {
-			entries.forEach((entry) => {
-				if (entry.isIntersecting && entry.target instanceof HTMLAnchorElement) {
-					const relAttributeValue = entry.target.getAttribute('rel') || '';
-					let matchesIntentSelector = false;
-					// Check if intentSelector is an array
-					if (Array.isArray(intentSelector)) {
-						// If intentSelector is an array, use .some() to check for matches
-						matchesIntentSelector = intentSelector.some((intent) =>
-							relAttributeValue.includes(intent)
-						);
-					} else {
-						// If intentSelector is a string, use .includes() to check for a match
-						matchesIntentSelector = relAttributeValue.includes(intentSelector);
-					}
-					if (!matchesIntentSelector) {
-						toAdd(() => preloadHref(entry.target as HTMLAnchorElement).finally(isDone));
-					}
-				}
-			});
-		});
-
-	requestIdleCallback(() => {
-		const links = [...document.querySelectorAll<HTMLAnchorElement>(selector)].filter(shouldPreload);
-		links.forEach(observe);
-
-		const intentSelectorFinal = Array.isArray(intentSelector)
-			? intentSelector.join(',')
-			: intentSelector;
-		// Observe links with prefetch-intent
-		const intentLinks = [
-			...document.querySelectorAll<HTMLAnchorElement>(intentSelectorFinal),
-		].filter(shouldPreload);
-		intentLinks.forEach((link) => {
-			events.map((event) =>
-				link.addEventListener(event, onLinkEvent, { passive: true, once: true })
-			);
-		});
-	});
-}