dependencies 和 devDependencies

npm install module-name -save

 

The wording, will add dependencies of dependencies package.json wrote

 

npm install module-name -save-dev

 

The wording, will add dependencies of written devDependencies package.json

 

 

(1) For the current project, the implementation of npm install, dependencies and all will depend on all the following devDependencies download.

(2) when released npm package, download the specified module-name, dependencies following dependencies are downloaded together.