'decoratorsBeforeExport' can't be used with legacy decorators.

[mspoerer]

Bug Report

Current Behavior
As the documentation describes, the @babel/plugin-proposal-decorators can be configured through the parameters: decoratorsBeforeExport and legacy.
Somehow the combination of decoratorsBeforeExport: true & legacy: true throws an error.

Line of Code:

babel/packages/babel-plugin-proposal-decorators/src/index.js

Line 25 in eac4c5b

"'decoratorsBeforeExport' can't be used with legacy decorators.",

[babel-bot]

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[mspoerer]

It seems that the documentation is wrong. The default value of the parameter decoratorsBeforeExport is true and not false.

[nicolo-ribaudo]

The documentation is wrong because it doesn't have a default value. It can only be used if you are using legacy: false (so it can never be used until we support legacy: false).

This is a duplicate of #8562. Do you want to update the docs?