Invalid plugin specified in Babel options: "proposal-optional-chaining"

[andrei-cacio]

🐛 bug report

Description of the problem

I am trying to use the babel plugin proposal-optional-chaining in a custom .babelrc file. I simply added the depedency @babel/plugin-proposal-optional-chaining via the Add Dependency button and then I added the @babel/plugin-proposal-optional-chaining plugin name in the plugins attribute in the .babelrc file. Just like the docs stated: https://babeljs.io/docs/en/next/babel-plugin-proposal-optional-chaining.html.

However there seems to be a problem detecting the plugin.

How has this issue affected you? What are you trying to accomplish?

Just wanted to play around with the optional chaining proposal

Link to sandbox: link (optional)

https://codesandbox.io/s/headless-http-io6xu

Your Environment

Software	Name/Version
Сodesandbox	PROD-1572624626-def377908
Browser	Chrome latest
Operating System	MacOS Catalina

[yiyi1026]

I got the same, showing "Transpiling Modules...".

Hours of research, it turns out it's create-react-app causing errors.
But still no idea why codesandbox won't stop transpiling.

[alekslario]

Bump

[siddharthkp]

Hi 👋

I did some tweaking and was able to make this work: https://codesandbox.io/s/proud-hooks-icp6r

1. Move @babel/core to dependencies instead of devDependencies
2. In .babelrc, call it proposal-optional-chaining instead of @babel/plugin-proposal-optional-chaining

Both of these are workarounds while the parsing logic failed to get the plugin name right, I'm keeping this open as a bug but have fun with optional chaining, such a cool addition! 😄

[andrei-cacio]

thank you @siddharthkp! I will give it a go.

[github-actions]

This issue is stale because it has been open many days with no activity. It will be closed soon unless the stale label is removed or a comment is made.

[github-actions]

This issue has been automatically closed because there wasn't any activity after the previous notice or the stale label wasn't removed.

[lobsterkatie]

Just ran into this, and can confirm that calling it "proposal-optional-chaining" in the config fixed the problem. But this should be reopened, because it's still a bug.