☰

InstantPage Super Lite

Preload/Prefetch page on hovering.

// ==UserScript==
// @name              InstantPage Super Lite
// @namespace         Need4Speed
// @version           1.4.6
// @author            -
// @match             *://*/*
// @noframes
// @run-at            document-idle
// @grant             none
// @description Preload/Prefetch page on hovering.
// ==/UserScript==

var EXCLUDE = new RegExp(/login|logout|register|signin|signup|signout|pay|create|edit|download|del|reset|submit|doubleclick|googleads|exit|unread/);

let t, e, n, o, i, a = null,
	s = 65,
	c = new Set;
const r = 1111;

function d(t) {
	o = performance.now();
	const e = t.target.closest("a");
	m(e) && p(e.href, "high")
}

function u(t) {
	if (performance.now() - o < r) return;
	if (!("closest" in t.target)) return;
	const e = t.target.closest("a");
	m(e) && (e.addEventListener("mouseout", f, {
		passive: !0
	}), i = setTimeout(() => {
		p(e.href, "high"), i = void 0
	}, s))
}

function l(t) {
	const e = t.target.closest("a");
	m(e) && p(e.href, "high")
}

function f(t) {
	t.relatedTarget && t.target.closest("a") == t.relatedTarget.closest("a") || i && (clearTimeout(i), i = void 0)
}

function h(t) {
	if (performance.now() - o < r) return;
	const e = t.target.closest("a");
	if (t.which > 1 || t.metaKey || t.ctrlKey) return;
	if (!e) return;
	e.addEventListener("click", function (t) {
		1337 != t.detail && t.preventDefault()
	}, {
		capture: !0,
		passive: !1,
		once: !0
	});
	const n = new MouseEvent("click", {
		view: window,
		bubbles: !0,
		cancelable: !1,
		detail: 1337
	});
	e.dispatchEvent(n)
}

function m(o) {
  if (o.href.match(EXCLUDE)) {return}
	if (o && o.href && (!n || "instant" in o.dataset)) {
		if (o.origin != location.origin) {
			if (!(e || "instant" in o.dataset) || !a) return
		}
		if (["http:", "https:"].includes(o.protocol) && ("http:" != o.protocol || "https:" != location.protocol) && (t || !o.search || "instant" in o.dataset) && !(o.hash && o.pathname + o.search == location.pathname + location.search || "noInstant" in o.dataset)) return !0
	}
}

function p(t, e = "auto") {
	if (c.has(t)) return;
	const n = document.createElement("link");
	n.rel = "prefetch", n.href = t, n.fetchPriority = e, n.as = "document", document.head.appendChild(n), c.add(t)
}! function () {
	if (!document.createElement("link").relList.supports("prefetch")) return;
	const o = "instantVaryAccept" in document.body.dataset || "Shopify" in window,
		i = navigator.userAgent.indexOf("Chrome/");
	i > -1 && (a = parseInt(navigator.userAgent.substring(i + "Chrome/".length)));
	if (o && a && a < 110) return;
	const c = "instantMousedownShortcut" in document.body.dataset;
	t = "instantAllowQueryString" in document.body.dataset, e = "instantAllowExternalLinks" in document.body.dataset, n = "instantWhitelist" in document.body.dataset;
	const r = {
		capture: !0,
		passive: !0
	};
	let f = !1,
		v = !1,
		g = !1;
	if ("instantIntensity" in document.body.dataset) {
		const t = document.body.dataset.instantIntensity;
		if (t.startsWith("mousedown")) f = !0, "mousedown-only" == t && (v = !0);
		else if (t.startsWith("viewport")) {
			const e = navigator.connection && navigator.connection.saveData,
				n = navigator.connection && navigator.connection.effectiveType && navigator.connection.effectiveType.includes("2g");
			e || n || ("viewport" == t ? document.documentElement.clientWidth * document.documentElement.clientHeight < 45e4 && (g = !0) : "viewport-all" == t && (g = !0))
		} else {
			const e = parseInt(t);
			isNaN(e) || (s = e)
		}
	}
	v || document.addEventListener("touchstart", d, r);
	f ? c || document.addEventListener("mousedown", l, r) : document.addEventListener("mouseover", u, r);
	c && document.addEventListener("mousedown", h, r);
	if (g) {
		let t = window.requestIdleCallback;
		t || (t = (t => {
			t()
		})), t(function () {
			const t = new IntersectionObserver(e => {
				e.forEach(e => {
					if (e.isIntersecting) {
						const n = e.target;
						t.unobserve(n), p(n.href)
					}
				})
			});
			document.querySelectorAll("a").forEach(e => {
				m(e) && t.observe(e)
			})
		}, {
			timeout: 1500
		})
	}
}();