@vue/cli 4.0.5 transpileDependencies invalid

Version

4.0.5

Reproduction link

https://github.com/lxfu/vue-g6

Environment info

Mac、IE11

Steps to reproduce

npm i
npm run serve

What is expected?

app should work under IE11.

What is actually happening?

The arrow function inside the dependency is not compiled

---

IE11 does not support arrow functions

[LinusBorg]

Your reprodution doesn't contain any reference to transpileDepenencies.

You likely forgot to push the changes?

sorry! submitted.

The problem with the arrow function has been solved, because i uesd tnpm, but new problems have arisen, TypeError.

After adding transpileDepenencies, @antv/g6 It doesn't work on chrome.

[haoqunjiang]

Workaround: set babel.config.js to:

module.exports = {
  sourceType: 'unambiguous',
  presets: ['@vue/cli-plugin-babel/preset']
};

I think we should set it as the default🤔

[LinusBorg]

I this setting safe for arbitrary dependencies? Afaik it's only necessary when attempting to transpile a module that's using the commonjs module format.

[JessicaSachs]

I've been living with sourceType: 'unambiguous' for a year or so. It will break things in various plugins and I don't think it should be the default.

[haoqunjiang]

@JessicaSachs could you elaborate on the incompatible plugins?

[JessicaSachs]

I’ve run into issues with plugins like styleguidist that do some static analysis. They’ve been fixed, but not until I submitted a reproduction repo. It’s not a common setting and there is risk of breaking existing repositories by changing the sourceType default.

I've been living with sourceType: 'unambiguous' for a year or so. It will break things in various plugins and I don't think it should be the default.

Is there any problem, can you list?