Hot Reload
ELI5 — The Vibe Check
Hot reload updates your running app when you change code without restarting the whole server. Edit a file, save, and see the change instantly. No waiting for a full restart. It's the difference between a 0.1-second feedback loop and a 10-second one. Essential for developer sanity.
Real Talk
Hot reload (hot module replacement) updates application code in a running process without a full restart. In backend development, tools like Nodemon (restart-based), ts-node-dev (process restart), and framework-specific solutions (NestJS, Django with --reload) provide varying levels of hot reload. True HMR preserves application state while replacing changed modules.
When You'll Hear This
"Enable hot reload in development so you don't restart the server after every change." / "FastAPI's --reload flag watches for file changes and restarts Uvicorn automatically."
Related Terms
Nodemon
Nodemon watches your files and restarts your server every time you save.
Uvicorn
Uvicorn is the lightning-fast ASGI server that runs your FastAPI and Starlette apps. Think of it as the engine under FastAPI's hood.
Webpack
Webpack is the OG bundler — the grumpy grandpa of the JavaScript build world.