[Compiler Bug]: `eslint-plugin-react-compiler`: npm warn deprecated `@babel/plugin-proposal-private-methods`

[rakleed]

What kind of issue is this?

• React Compiler core (the JS output is incorrect, or your app works incorrectly after optimization)
• babel-plugin-react-compiler (build issue installing or using the Babel plugin)
• eslint-plugin-react-compiler (build issue installing or using the eslint plugin)
• react-compiler-healthcheck (build issue installing or using the healthcheck script)

Link to repro

npm install eslint-plugin-react-compiler@beta --save-dev

Repro steps

npm install eslint-plugin-react-compiler@beta --save-dev

Message: npm warn deprecated @babel/plugin-proposal-private-methods@7.18.6: This proposal has been merged to the ECMAScript standard and thus this plugin is no longer maintained. Please use @babel/plugin-transform-private-methods instead.

How often does this bug happen?

Every time

What version of React are you using?

18.3.1

What version of React Compiler are you using?

N/A

[AnnAngela]

Sorry but this issue seems to have been ignored, I can confirm that this bug still exists today:

$ npm install -D eslint-plugin-react-compiler@beta
npm warn deprecated @babel/plugin-proposal-private-methods@7.18.6: This proposal has been merged to the ECMAScript standard and thus this plugin is no longer maintained. Please use @babel/plugin-transform-private-methods instead.

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found 0 vulnerabilities

[rakleed]

@poteto @josephsavona @mofeiZ, please reopen the issue since you reverted the commit that fixes the issue.

[onyedikachi23]

I just installed the compiler today on React 19 and got the same warning.

@poteto @josephsavona @mofeiZ, please reopen this issue; it's not fixed.

[christopherschroer]

This problem is still present today.

When running pnpm why @babel/plugin-proposal-private-methods, I get the following output

$ pnpm why @babel/plugin-proposal-private-methods
Legend: production dependency, optional only, dev only

devDependencies:
eslint-plugin-react-compiler 19.0.0-beta-e993439-20250405
└── @babel/plugin-proposal-private-methods 7.18.6

[genyslt]

https://www.npmjs.com/package/@babel/plugin-proposal-private-methods please, change dependency by babel recommendation