fix: add typings for alternative entrypoints

[levrik]

These were present in @types/mixpanel-browser before but got lost when inlining them. I originally introduced them in the external types through DefinitelyTyped/DefinitelyTyped#72165.

Fixes #501

[jakewski]

Hey thanks for the contribution!

If I'm understanding correctly, the use case here is to be able to import the pre-built bundles like import mixpanel from 'mixpanel-browser/dist/mixpanel-core' and the types are not applied? Also, does this PR build the files in dist or were they manually added? Everything in dist/ is generated code so just making sure npm run build-dist doesn't override all of your changes here.

[federicobond]

If I'm understanding correctly, the use case here is to be able to import the pre-built bundles like import mixpanel from 'mixpanel-browser/dist/mixpanel-core' and the types are not applied?

This is correct. It's currently preventing me (and likely others) from updating to the latest version of the mixpanel library.

[jakewski]

This code isn't going to be copied into dist/ as part of the build process (your current branch will have this change overridden when running npm run build-dist). I think the easiest way would be to add additional entrypoints in package.json like

mixpanel-js/package.json

Lines 27 to 31 in 012f1ee

	"./src/loaders/loader-module-core": {
	"types": "./src/index.d.ts",
	"import": "./src/loaders/loader-module-core.js",
	"require": "./src/loaders/loader-module-core.js"
	},

- or updating rollup config to generate these type files

[levrik]

Yeah. I opened this PR before you introduced the exports in package.json. I'll try to revisit this asap.
Actually these pre-built files aren't even accessible due to the introduction of exports anymore atm, not only the typings are missing.

[jakewski]

I can take this over if you can't get it to it, apologies for the trouble. Since we made these custom builds we said in our docs to import the non-built loaders (e.g. src/loaders/loader-module-core) because I thought that would be preferable.

[levrik]

This would be great if you could handle it. I would close this PR then.