He rewound the video. Mosh was now explaining asynchronous patterns – callbacks, promises, async/await . He didn’t just show the syntax. He explained why each one existed. He showed the mistake. Then he showed the fix.
Server running on port 3000 POST /api/user – 200 OK POST /api/user – 200 OK POST /api/user – 200 OK No crashes. code with mosh node js
He taught him how to think in asynchronous code. The right teacher doesn’t just give you code – they give you the mental model to never fear the event loop again. He rewound the video
He laughed out loud, waking his cat. Then he kept watching. By 3 AM, he’d learned about middleware, routing, environment variables, and even how to structure a real project with controllers and services. He explained why each one existed
"Okay, Mosh," Leo whispered. "Show me."
He clicked play.
"Why won't this API respond?"