Class default

const router = new Router();
const settingsRoute = "/settings";
const profileRoute = "/r/[A-Z,a-z,0-9]+/";

const settings = () => {
 let form = document.getElementById("form");
 const submit = () => {
   alert("Settings updated")
 }
 form.addEbentListener('submit', submit, true);
}

const profile = () => {
 let form = document.getElementById("form");
 const submit = () => {
   alert("profile updated")
 }
 form.addEbentListener('submit', submit, true);
}

router.register(settingsRoute, settings);
router.register(profileRoute, profile);

try {
 router.router()
} catch(e) {
 console.log(e);
}