Parcel: [Question] Is parcel suitable for building a npm package?

[cyan33]

Choose one: is this a 🐛 bug report or 🙋 feature request?

A question.

🎛 Configuration (.babelrc, package.json, cli command)

I'm writing a npm package, where I use the npm script to bundle the src files together into a single file. But I found the dist file doesn't bundle everything together, which causes this error:

/Users/changyan/Documents/repos/test/node_modules/react-animation-wrapper/lib/index.js:12:29: Cannot resolve dependency './emptyFunction'...

and when looking into the bundled file I noticed it's requiring something like this:

var e,r=require("./emptyFunction")

My npm script looks like this:

{
  "build": "parcel build ./src/index.js --out-dir ./lib",
}

And I searched around on the internet but didn't find something useful to resolve my problem. Also, I read a post that addressed that rollup or webpack are probably better choices for writing npm packages. Is that true? Or am I using it wrong?

🤔 Expected Behavior

😯 Current Behavior

💁 Possible Solution

🔦 Context

💻 Code Sample

🌍 Your Environment

| Software | Version(s) |
| ---------------- | ---------- |
| Parcel |
| Node |
| npm/Yarn |
| Operating System |

[jamesmcallister]

I think your after https://github.com/developit/microbundle

[albinotonnina]

Thanks @jamesmcallister , didn't know about this one!

[DeMoorJasper]

related to #192 Seems like u found a solution with microbundle ;)

[eldyvoon]

Having the same issue, what's wrong with using parcel-bundler for npm package bundling?

[DeMoorJasper]

@eldyvoon it should be possible, just not 3 months ago

_{Sent with GitHawk}

[djstein]

@DeMoorJasper or anyone else, so what I'm reading is that adding:

{
  "build": "parcel build ./src/index.js --out-dir ./lib",
}

to one's package.json would remove the need for would remove the need for rollup or microbundle

[texastoland]

@djstein it looks parcel build --target node was added in #652.

For libraries Microbundle is intended for building multiple outputs from the same input. In theory you get CJS, ESM, UMD, .min.js, .d.ts, etc. in one pass.

I don't think that's in scope for Parcel?

[bntzio]

Interesting... but what about the TS typings files?

[chocolateboy]

Looks like this might be in scope for Parcel 2?

[tunnckoCore]

@chocolateboy don't think so.

And still. Rollup HAS problems bundling everything and might be slow. Webpack is the only alternative, but cannot output ESM. There is @purtuga/esm-webpack-plugin, but it is a hack workaround just to make consuming easier. When third party is going to bundle to the generated package, the tree shaking won't work.

So. Yes we need more competition.