These are non-negotiable. Without these, every framework, every AI tool, every tutorial will leave you confused. Nail these first.
Git isn't optional. It's your undo button, your time machine, your safety net. Learn commit, branch, merge, stash, and revert before you write a single line in any AI tool. When Cursor rewrites your file and breaks everything — and it will — git is how you get back. No git, no recovery. It's that simple.
Every modern app talks to APIs. You need to understand what GET, POST, PUT, DELETE actually do. Know the difference between a query param and a request body. Understand status codes — 200 is good, 401 means you're not authenticated, 500 means the server is on fire. If you can't read an API doc, you can't build anything real.
JavaScript is asynchronous. Data doesn't arrive instantly. If you don't understand async/await, you'll get undefined everywhere and have no idea why. Learn promises. Learn try/catch. Learn why await only works inside async functions. This single concept will save you hundreds of hours of debugging.
Most beginners panic at red text. Don't. Error messages are gifts — they tell you exactly what's wrong. Read from the bottom up. Find the file name and line number. Google the exact error message. 90% of bugs are solved by actually reading the error instead of immediately asking AI to fix it.
You need more than npm install and npm run dev. Learn cd, ls, mkdir, rm, cat, grep, curl. Know how to kill a process. Know how to check what's running on a port. The terminal is your cockpit — learn the controls.
Your API keys, database URLs, and secrets live in .env files. Never, ever hardcode them. Never commit them. Learn how process.env works. Learn what .gitignore does. One leaked API key can cost you thousands in cloud bills. This isn't a nice-to-know — it's a must.
The Network tab shows you every request your app makes. The Console shows you errors. The Elements tab shows you the actual DOM. Learn to set breakpoints. Learn to inspect network responses. DevTools is free, built into your browser, and more powerful than most paid debugging tools.
Even if you use an ORM, you need to understand SELECT, INSERT, UPDATE, DELETE, JOIN, and WHERE. Know what a primary key is. Know what a foreign key does. When your app is slow, it's usually the database. You can't optimize what you don't understand.
Docs aren't textbooks — you don't read them cover to cover. You search. You scan. You find the example that matches your use case. Learn to navigate official docs fast: quickstart, API reference, examples. The best developers aren't the smartest — they're the fastest at finding answers in docs.
Google for specific error messages, stack traces, and well-documented patterns. Ask AI for conceptual explanations, code generation, and refactoring. Don't ask AI to debug something you haven't tried to read first. Don't Google conceptual questions — AI explains them better. Use the right tool for the right job.
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