The answer
Install Node.js, initialize a project with package.json, install react and react-dom, add a bundler like Parcel as a devDependency, create an index.html and JavaScript entry, and mount your app with createRoot.
From Episode 1 to Episode 2: Setting Up Your Real React App
How do I move from a React CDN setup to a real project?
More FAQs in From Episode 1 to Episode 2: Setting Up Your Real React App
Install Node.js LTS first and verify npm works. Then initialize the project to create package.json. After that, install react and react-dom as dependencies and add a bundler as a devDependency.
No. That is too much at once. Get the app running first with React, ReactDOM, and a bundler. Add styling, linting, testing, and routing only when later episodes introduce them.
To exclude node_modules and other generated files from Git. node_modules is large and reproducible from package.json, so committing it bloats the repository and causes avoidable merge conflicts.
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