Webpack bundle for Node.js?

For next steps of reducing size I need the decision from you.

Right now EmojiMart bundle everything including dependencies to webpack bundle at dist/emoji-mart.js and dist/emoji-mart.min.js. As result we have 3 problems:

1. The user will have 2 webpack preambles (webpack inner functions and magic) — one from their webpack, second from EmojiMart.
2. Even if the user has own core-js they anyway will have 2 core-js copies — one from their dependencies, second from EmojiMart. The main problem that core-js is really big. About 10% of the current EmojiMart bundle.
3. PropTypes slow down JS execution in production and keep size in the EmojiMart bundle. If the user has own PropTypes, they will have 2 copies of PropTypes.

My plan of size optimization:

1. During build process compile files by Babel to dist/, but don’t bundle them into the single file. package.json’s main will target to dist/index.js. Anyway, most of React users have webpack or other bundlers.
2. Bundle this files to dist/emoji-mart.min.js for backward compatibility, but do not use this file in package.json’s main.
3. core-js and all other dependencies will be in package.json dependencies and required with require('core-js'). So we will use same core-js as the user already has.
4. Remove PropTypes with babel-plugin-transform-react-remove-prop-types.
5. Try to find code uses process and rewrite it, so webpack will not insert process polyfill.

Question for @EtienneLem:

1. Do we really need dist/emoji-mart.min.js? I understand this file for jQuery plugins, etc. But it is extremely rare to use React without any bundler.
2. Do we really need core-js? Maybe we can rewrite code, that uses some ES6 classes? Or just put the warning to docs, if you need to support IE 11, please add core-js (for example, we do not send huge core-js to everyone, we send it only to IE 11 users).

[ai]

You got different number. Size Limit shows size after UglifyJS and gzip.

Just ignore difference, everything is fine.

But reading about UglifyJS and gzip is always good.

[ai]

@davojta can you check EmojiMart from my PR? Maybe I fixed problem 😄