npm start port code example

Example 1: cancel ng server port

Using your terminal, find the PID of port 4200
netstat -ano | findstr :4200

Kill task by the PID Number (Replace 15940)
taskkill /PID 15940 /F

Example 2: change port in npm start

npm run dev -- --port 8080

Example 3: react native npm run start port

"scripts": {    "start": "react-native start --port 9988"}