all! I currently met a difficulty with my project. I want to modify the code of a component from a UI library (like Semantic-UI, Material-UI). What I do now is just edited the code from the node_modules. But the reality is no matter how I change the code from node_modules, my project will not be affected. Why this will
Well that's because most modules have build process which you need to run before using them. Also editing a module directly is not a good idea because any change you do to them is guaranteed to be lost after next npm install.
As Vuetify is a MIT licensed, I suggest to fork its GitHub project and then publish it as your own npm package.