Port 4203 is already in use. Use '--port' to specify a diffe

Question

Port 4203 is already in use. Use '--port' to specify a different port.\ how to fix this in angular 5 please anyone can help. thanks

Manav Pandya · Answer

Hello This is common error , that personally i have faced so many times Reason : there are multiple app running with same port number with port number like App1 : 4200 App2 : 4200 There are two ways to resolve this issue 1 . Very much simple to implement For that you need to specify port number when serving request : ng serve -o --port 4444 // always use different than existing port number 2 . You can set port number in package.json file like below : Just ad or modify below snippet "defaults" : { "serve" : { "port" : 4444 } } Let me know if you still facing this issue Thanks

Manav Pandya · Answer

Hello Yes you need to install all dependecy that you required for project After running command npm install , package.json file will be created And also install angular cli by writing : npm install --save @angular/cli Than you will be able to use any npm commands easily Thanks

Manav Pandya · Answer

Hello In visual studio there is also CMD for that Just go to :- tools -> Nuget package manager -> package manager console And type any command like : ng serve Note : you should have Angular CLI installed This is solution for visual studio Thanks

Port 4203 is already in use. Use '--port' to specify a diffe

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