![javascript - keep getting "? Something is already running on port 3000" when I do npm start on react app - Stack Overflow javascript - keep getting "? Something is already running on port 3000" when I do npm start on react app - Stack Overflow](https://i.stack.imgur.com/oK5ui.png)
javascript - keep getting "? Something is already running on port 3000" when I do npm start on react app - Stack Overflow
![Address already in use – bind(2) for “127.0.0.1” port 3000 (Errno::EADDRINUSE) | Check what process is running in your localhost – C B Address already in use – bind(2) for “127.0.0.1” port 3000 (Errno::EADDRINUSE) | Check what process is running in your localhost – C B](http://carolinabadas.com/wp-content/uploads/2019/09/Screenshot-2019-09-10-at-10.42.55.png)
Address already in use – bind(2) for “127.0.0.1” port 3000 (Errno::EADDRINUSE) | Check what process is running in your localhost – C B
![NET Core + React template - After replacing ReactJS project with a new Typescript project, the backend and the UI open in separate tabs. How to fix this? : r/dotnet NET Core + React template - After replacing ReactJS project with a new Typescript project, the backend and the UI open in separate tabs. How to fix this? : r/dotnet](https://preview.redd.it/net-core-react-template-after-replacing-reactjs-project-v0-rul4atxf8kx91.png?width=1682&format=png&auto=webp&s=1b3ea7b9691261da18950347bebeb580f98d905d)
NET Core + React template - After replacing ReactJS project with a new Typescript project, the backend and the UI open in separate tabs. How to fix this? : r/dotnet
![javascript - keep getting "? Something is already running on port 3000" when I do npm start on react app - Stack Overflow javascript - keep getting "? Something is already running on port 3000" when I do npm start on react app - Stack Overflow](https://i.stack.imgur.com/ehTRt.png)
javascript - keep getting "? Something is already running on port 3000" when I do npm start on react app - Stack Overflow
![javascript - keep getting "? Something is already running on port 3000" when I do npm start on react app - Stack Overflow javascript - keep getting "? Something is already running on port 3000" when I do npm start on react app - Stack Overflow](https://i.stack.imgur.com/acuJ3.png)
javascript - keep getting "? Something is already running on port 3000" when I do npm start on react app - Stack Overflow
![javascript - keep getting "? Something is already running on port 3000" when I do npm start on react app - Stack Overflow javascript - keep getting "? Something is already running on port 3000" when I do npm start on react app - Stack Overflow](https://i.stack.imgur.com/nsITN.png)
javascript - keep getting "? Something is already running on port 3000" when I do npm start on react app - Stack Overflow
![javascript - keep getting "? Something is already running on port 3000" when I do npm start on react app - Stack Overflow javascript - keep getting "? Something is already running on port 3000" when I do npm start on react app - Stack Overflow](https://i.stack.imgur.com/K7wjg.png)
javascript - keep getting "? Something is already running on port 3000" when I do npm start on react app - Stack Overflow
![React JS: How to fix something is already running on port 3000 error (run react on another port) - YouTube React JS: How to fix something is already running on port 3000 error (run react on another port) - YouTube](https://i.ytimg.com/vi/3n0vvlqXrrk/sddefault.jpg)