After I npm run dev for the project I am working on, I modify the file again, and the terminal will not automatically npm run dev. My previous files are all fine. If I keep running them manually, it will be very time-consuming. Please tell me how to solve the problem. Thank you! ! ! 
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
You should be talking about hot update, which should need to be configured. If you built node.js by yourself, then you need to configure it. https://www.npmjs.com/package... There are configuration methods above