React is a framework created by the Facebook team which allows you to build flexible, componetised user interfaces. You can also create single page applications with it.
Use Local Storage in React using hooks by building a progress tracker like Next.js' course page
Learn how to set up local storage in React using Hooks
Implement an exit intent modal in React
Exit intent is a marketing strategy which increases conversion without being obstructive and annoying to customers. It displays a modal before the user leaves the page.