npm start stopped working on react project

Question

I've been working on a project using React.js It used to work fine on localhost:3000 but suddenly this has stopped working. The commands I did before was

• sudo npm run bundle
• sudo npm start

And then my project was running. But now it says localhost refused connection. Message in the console:

"Failed to load resource: net::ERR_CONNECTION_REFUSED". Any ideas why?

• I have checked that localhost:3000 not occupied
• I have checked that Im working in the correct folder and all files seems * to be present
• I have checked that Im using the latest npm and node version

Answer 1

You don't say what OS you are using but if it is MacOS or Linux you might want to check what $HOST is set to.

See How to start a react app with a custom host and port