I I'm just learning about odoo, I get a blank web after defining a simple dashboard that only contains h1, here is the javascript:

import { registry } from "@web/core/registry";

const actionRegistry = registry.category("actions");

class LibraryDashboard extends owl.Component{ 

setup(){ }};

LibraryDashboard.template = LibraryDashboard;

actionRegistry.add('library_dashboard_tag', LibraryDashboard);

I already ensure that js and the template on manifest file