webpack-dev-server error on npm start

Question

I am trying to run npm start on ng2-admin,all was working untill I did npm update to try to update the pacakages,

after that did npm start and have an error:

Answer 1

change dependency in package.json to

"webpack-dev-server": "2.1.0-beta.10", Instead of something like

"webpack-dev-server": "^2.1.0-beta.9",

run npm install or npm update afterwards.

Answer 2

The relevant part of the error message is : listen EADDRINUSE 127.0.0.1:8080. That means that webpack-dev-server is trying to run on 127.0.0.1:8080, but the address and port is already in use.

Try opening your browser and typing 127.0.0.1:8080 into the address bar. Perhaps there is another server running on that port already. Run jobs to check for background processes.