update UI when hash changes

src/main.js

@@ -3,9 +3,12 @@ import {RootViewModel} from "./RootViewModel.js";
 import {RootView} from "./RootView.js";
 
 export async function main(container) {
-	const vm = new RootViewModel(xhrRequest, location.hash);
-	vm.load();
+	const vm = new RootViewModel(xhrRequest);
+	vm.updateHash(location.hash);
 	window.__rootvm = vm;
 	const view = new RootView(vm);
 	container.appendChild(view.mount());
+	window.addEventListener('hashchange', event => {
+		vm.updateHash(location.hash);
+	});
 }