Typescript ES5 helper methods duplicated

Question

I'm using typescript and webpack to compile my ES+ code down to ES5, with each module contained in its own output bundle.

For example:

class User {} = 1.js
class Table {} = 2.js

When looking at the output I'm noticing duplicate functions across the bundles, e.g:

__decorate
__awaiter
__generator

These are obviously helpers from the transpile down to ES5, is there any way to move these into a shared bundle to reduce duplication?

Answer 1

This is achieved with importHelpers compiler option. It imports all helper functions in every place they are needed.

It requires to install tslib package.