how to kill a process that is running on a port? code example

Example 1: kill a port

kill $(lsof -t -i:8080)
//kill port 8080

Example 2: kill process on port

lsof -i:3000           // Change 3000 to whatever your port is!
sudo kill 9 <PID>      // Change <PID> to the Pid number the above command returns