The best way to run npm install for nested folders?

Question

What is the most correct way to install npm packages in nested sub folders?

my-app
  /my-sub-module
  package.json
package.json

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Answer 1

I prefer using post-install, if you know the names of the nested subdir. In package.json:

"scripts": {
  "postinstall": "cd nested_dir && npm install",
  ...
}