Record a Vue ui stuck in the compilation and hot deployment phase

I used it well, but after I went to a meal, I couldn't start it after I came back
.

Solution:
1. Delete the node-modules folder of the project.
2. Re-download dependencies with npm install
3. Recompile with npm run build. If there is an error, modify it, and the warning can be ignored.
4. Start npm run serve, and then it will work.