FrontendPro

Choose a challenge and turn its design into a working interface. The listed examples include components such as ratings and sortable lists, so you can select a bounded feature rather than a whole application. Share the result when you want feedback on choices that are difficult to judge alone. The site says a free GitHub-linked account gives access to all challenges. Its examples are labelled beginner, intermediate or hard, which helps narrow the size of the component you take on.