A very lightweight GoatCounter count script. It only counts the visit without transferring too much data. Perfect for single-page websites.

count.lite.js

// Only count the production website
// TODO: You should replace these with your webpage production URL
if (window.location.host === "domain.tld") {
	// Check if the default GC URL resolves
	// This allows us to not track people with ad blockers
	fetch("//gc.zgo.at/", { method: "HEAD" })
		.then((result) => {
			if (!result.ok) {
				return;
			}

			// You can remove this if you don't need screen data
			const screen = encodeURIComponent(
				[
					window.screen.width,
					window.screen.height,
					window.devicePixelRatio || 1,
				].join(",")
			);

			const random = encodeURIComponent(Math.random().toString(36).slice(2));

			navigator.sendBeacon(
				// TODO: change this to your count URL
				`https://YOUR_GOATCOUNTER_ID.goatcounter.com/count?p=%2F&s=${screen}&b=0&rnd=${random}`
			);
		})
		.catch((_) => {});
}