What's the difference between installing packages from devDependencies and dependencies?

Question

npm

I am using the NPM package manager . All packages are described in the package.json file On a Mac , executing the "npm i" command installs all packages from both devDependencies and dependencies . In windows , packages are installed only from dependencies - what's the difference?

Answer 1

You just need to use it in production:
then packages from devDependencieswill be ignored

Answer 2

npm install //this is on production
Installs only the dependencies listed in the "dependencies" subsection (for production) in package.json, it does not install dependencies from the "devDependencies" section.

Answer 3

I tried it with a friend on Windows. All packages are installed from both devDependencies and dependencies . For me, their devDependencies are not put in any.