Node.js & Express

Node.js process runs out of memory during a large build

Express req.body is empty even though JSON was sent

Express middleware order breaks authentication

Node.js server keeps port open after process exits

Node.js reads a file before another process finishes writing it

Express API returns 404 for a route that exists

Node.js application crashes with unhandled promise rejection

Express cookies work locally but disappear in production

Node.js cannot import an ES module from a CommonJS project

Express API becomes slow after many simultaneous requests