Decrease npm package size

[mef]

Users of the intl-tel-input npm package need the CSS and JavaScript utilities located in the build directory, and do not need to install any of the dependencies, submodules and other tooling of the repository.

Currently, the npm package copies the content of the whole github repository at each install, including the content of libphonenumber dependency, which consumes more than 100 MB of disk space.

This is problematic in multiple ways:

• the package takes a long time to download whenever installing with a slow Internet connection
• the package takes a long time to decompress on low spec, slow hardware
• the size of the package might create challenges when using in programs installed on low spec hardware
• consequently, the programs using the package suffer from the same problem: they are slower to install and deploy, and consume a lot of disk space unnecessarily.
• all the overhead has a negative impact on the environment as it causes unneeded energy consumption - even if this impact is negligible compared to other factors.

Steps to reproduce

1. Navigate to an empty directory
2. Execute the command npm install intl-tel-input
3. Check the installed packages and the space they use du -sh node_modules/*
4. Check the number of files installed find node_modules/ -type f | wc -l

Expected behaviour

• The only node.js module installed is intl-tel-input
• The number of files installed is small, definitely less than a hundred files
• The disk space used by the module is small, ideally less than a megabyte

Actual behaviour

• 8 packages are installed in addition to intl-tel-input
• 3975 files are present inside node_modules directory
• node_modules directory consumes 122MB of disk space

Current output of du -sh node_modules/*:

117M	node_modules/intl-tel-input
32K	node_modules/js-tokens
36K	node_modules/loose-envify
20K	node_modules/object-assign
128K	node_modules/prop-types
380K	node_modules/react
4.4M	node_modules/react-dom
56K	node_modules/react-is
156K	node_modules/scheduler

Initialisation options

N/A

Proposed solution

1. Move react, react-dom and prop-types from dependencies to devDependencies inside package.json.
2. Use the files property inside package.json in order to specify which files should be included in the npm package.

For example, the following setup decreases the size to 25 files, using 1.2MB (100x reduction):

  "files": [
	  "build/*",
	  "CHANGELOG.md",
	  "LICENSE",
	  "package.json",
	  "package-lock.json",
	  "README.md",
	  "screenshots/*"
  ],

[jackocnr]

Merged, thanks again.