The difference-d-s when NPM packs

When we use NPM install to install modules or plug-ins, there are two kinds of commands to write them to the Package.json file, such as:

--save-dev

--save

The difference in the Package.json file is that the plug-in installed using--save-dev is written to the Devdependencies object, and the plug-in installed with--save is written to the Dependencies object.

What is the difference between the devdependencies and the Dependencies object in the Package.json file?

The plug-ins inside the devdependencies are only for the development environment, not for the production environment, and the dependencies is to be published to the production environment.