may not be very detailed, specifically:
for example, there is a webpack single-page running environment, I have A project, B project, C project, all under this webpack development environment, can be developed.
that is to say, in this single-page environment, I only need to install dependencies on my computer once, and then there are D projects, E projects, and I can run directly by setting up a folder in this single-page environment. Regardless of Project A, Project B. What do they have their own independent dependencies, self-installed in the current project directory on the outermost layer of OK, is a public dependency.