build: ship commonjs version for node and testing

[Hotell]

Currently if i wanna use same polyfills in testing environment ( jest ) like in dev/prod with typescript I have to do a lot of ceremony:

• in jest config

{
transformIgnorePatterns: [
    '<rootDir>/node_modules/(?!@abraham/reflection/.*)',
  ],
}

• in tsconfig

{
"allowJs": true
}

this is rather hack then good DX experience :)

shipping commonJS bundle is a no brainer and would help a lot ;) cheers

[abraham]

Are you compiling to JS and then running the tests on the compiled version?

How would you imagine the two build targets would be handled? Something like this?

import '@abraham/reflection';

require('@abraham/reflection/dist/common.js');

[Hotell]

the API should remain same, package.json should be source of truth here., I think. WDYT ? :)

{
  "main": "dist/reflection.umd.js", // commonjs bundle
  "module": "dist/index.js", // es2015 module
}

[abraham]

Are there build tools that use the module entry? I think unpkg does but I don't know about any others.

[Hotell]

Webpack, rollup ... I'm using it all the time https://github.com/Hotell/typescript-lib-starter

[abraham]

Want to give abraham/reflection#rollup a try?

[Hotell]

that works! although rollup consumes es2015 module files 😥so there is no dist/index.js anymore

[Hotell]

oh nevermind, it builds correctly when explicitly running build within node modules :)