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Don't transform declare class in plugin-proposal-class-properties #13854


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@forivall forivall commented Oct 16, 2021

Q                       A
Fixed Issues? Fixes #13853
Patch: Bug Fix? Yes
Major: Breaking Change? No
Minor: New Feature? No
Tests Added + Pass? Not yet
Documentation PR Link
Any Dependency Changes? No
License MIT

In the Class visitor,

  if (path.node.declare) return;

has been added.

Also some typescript improvements in the typescript transform.

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@codesandbox codesandbox bot commented Oct 16, 2021

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Co-authored-by: Nicolò Ribaudo <>
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@babel-bot babel-bot commented Oct 16, 2021

Build successful! You can test your changes in the REPL here:

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@nicolo-ribaudo nicolo-ribaudo left a comment

I don't like that we throw an error, but plugin ordering is the hardest part of Babel's architecture so 🤷

@nicolo-ribaudo nicolo-ribaudo merged commit fca5c9a into babel:main Oct 20, 2021
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@forivall forivall commented Oct 22, 2021

@nicolo-ribaudo yeah, I struggled with figuring out how to get the plugin ordering just right and i've left a note: #13853 (comment) . Hopefully a future version of babel can manage plugin+preset ordering in a better way. Maybe something as simple as printing the effective config when an error like this is thrown.

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5 participants