Not tree shaking with webpack 4

[carrickjason]

When I import { isEmail } from 'validator', It still shows the entire lib with no tree shaking when using webpack 4 for my production build. Could this be solved by adding "sideEffects": false to the package.json as per webpacks docs?

[chriso]

I'm not sure, but happy to accept a PR with a fix.

[RobertFischer]

@chriso -- Are there any files you're aware of which cause side effects (eg: assign to global variables, etc.)? I'm not seeing anything, but I can look again.

If the modules really are all pure, then we can do what the original user suggested and enable tree shaking by adding "sideEffects": false to the package.json, and I'll submit a PR.

[banjankri]

We are also facing this issue, unused validators are not tree-shaken away. As per the docs I can see two problems here:

1. as said previously the sideEffects not being set
2. webpack documentation requires original import/export statements to be preserved for the tree-shaking and it seems they are transpiled.