register-sw.js

"use strict";
/**
 * Distributed with Ultraviolet and compatible with most configurations.
 */
const stockSW = "/uv/sw.js";

/**
 * List of hostnames that are allowed to run serviceworkers on http://
 */
const swAllowedHostnames = ["localhost", "127.0.0.1"];

/**
 * Global util
 * Used in 404.html and index.html
 */
async function registerSW() {
	if (!navigator.serviceWorker) {
		if (
			location.protocol !== "https:" &&
			!swAllowedHostnames.includes(location.hostname)
		)
			throw new Error("Service workers cannot be registered without https.");

		throw new Error("Your browser doesn't support service workers.");
	}

	await navigator.serviceWorker.register(stockSW);
}