Optional topics

The optional topics extend the course. You work through them on your own, usually when your project needs them. Each page explains briefly what the topic is about and when it pays off in a project, shows a small example and points to the official documentation. The optional topics are not part of the exam.

Topic	Worth it when …
TypeScript with Vue	your project grows and you want to catch mistakes in props, events and data early
Nuxt and server-side rendering	content should show up quickly and be found by search engines
A backend of your own with Node	your app stores data that no public API provides
Authentication	only signed-in people may see or change certain data
PWAs and offline use	the app should be installable or work without a network
Several languages	people with different languages use the app
Animations and transitions	changes on the page should be easier to follow
End-to-end tests with Playwright	the most important flows should be checked in a real browser
Component libraries and CSS	you'd rather not design forms, tables and dialogs yourself
The same app in React	you build your project with React
The same app in Angular	you build your project with Angular

Your own backend, authentication, end-to-end tests, TypeScript throughout and a PWA that works offline earn bonus points in the project, as the project assignment describes. The runnable examples are in the folder optional of the course repo, the playground examples under examples/optional.