wtf is jquery-not-defined?

Based on the README provided, this repository is a standard Create React App project template, essentially a starter kit for building web applications with React, a popular JavaScript library for creating interactive user interfaces. At its core, the project gives you a pre-configured development environment so you don't have to worry about setting up build tools, testing frameworks, or other boilerplate. When you run npm start, your app launches in a local browser and automatically refreshes whenever you make changes to your code. You can write modern JavaScript, including features like async/await and class syntax, without needing to understand the underlying configuration. The README walks you through common tasks like installing libraries, organizing your code, running tests, and eventually deploying your finished app to the web. The project is built around three main folders: src (where you write your code), public (where static assets like images and your HTML entry point live), and node_modules (where dependencies are installed). You edit files in src, and a tool called Webpack automatically bundles everything together. When you're ready to go live, npm run build optimizes your code for production, minifying it and improving load times. Someone would use this if they're building a web app with React and want to skip the tedious configuration work. Examples include a startup building a customer dashboard, a freelancer creating an interactive portfolio, or a team working on a real-time collaboration tool. The main trade-off is that most configuration decisions are hidden from you initially, which keeps things simple, but you can always "eject" (one-way, irreversible) to take full control if you need advanced customization later. The README itself is comprehensive but mostly a reference guide rather than a quick start, it covers deployment options, testing patterns, environment variables, and troubleshooting. The actual codebase (3 stars suggests this is a personal or experimental fork) isn't described in detail here, so the real work happens when you start building components in the src folder.