Object Spread not work properly on build mode

[jasonamavisca]

Object spread not work properly on build, but work fine on watch mode.

snippet from my redux-saga function

function* loginByEmailWorker(action) {
	try {
		const response = yield call(loginByPassword, ...action.payload);
		yield put({ type: constants.AUTH_RECEIVE_LOGIN_BY_EMAIL, payload: response });
	} catch (error) {
		yield put({ type: constants.AUTH_RECEIVE_LOGIN_BY_EMAIL, payload:error });
	}
}

action.payload that I spread is an array. it spread correctly when I use npm run start but not spread when I use npm run build.

theres no error, it just not spreading. it behave like Im not giving spread operator

I use the default config from this libary.

Any help ? Thanks

[mcapkovic]

I have a similar problem with index.modern.js. During the "watch" const d = new Set([1, 2, 3]); const e = [...d]; but after the build var d = new Set([1, 2, 3]); var e = [].concat(d); which is not the same at all.

I am also using the default config.

[PButcher]

@mcapkovic This is caused by a problem in microbundle when exporting modules alongside cjs. In my case, when exporting a modern and cjs module. It was reported in the microbundle repo: https://github.com/developit/microbundle/issues/560 and was supposedly fixed back in June.

The problem is that create-react-library uses a fork of microbundle called microbundle-crl, which hasn't been updated with these fixes.

I'm also trying to find a sensible workaround for this right now.

It's probably also worth noting that swapping out microbundle-crl for microbundle did not help, it caused more problems.

[PButcher]

@mcapkovic For now I'm just generating modern versions of my package:

  "scripts": {
    "build": "microbundle-crl --no-compress --format modern",
    "start": "microbundle-crl watch --no-compress --format modern",
}

[mcapkovic]

@PButcher Thank you.