babel.loadPartialConfigSync is not a function

[vinay-athiyil]

Describe the bug

I have upgraded react-scripts package to latest 5.0.0. While running 'npm run build' got following error:

src/store.js
  Line 0:  Parsing error: babel.loadPartialConfigSync is not a function


npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! react-app@0.1.0 build: `react-scripts build`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the react-app@0.1.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:

Did you try recovering your dependencies?

#npm --version
6.14.15

Which terms did you search for in User Guide?

(Write your answer here if relevant.)

Environment

# npm --version
6.14.15
# npx create-react-app --info
npx: installed 67 in 4.61s

Environment Info:

  current version of create-react-app: 5.0.0
  running from /root/.npm/_npx/18603/lib/node_modules/create-react-app

  System:
    OS: Linux 4.18 CentOS Linux 8
    CPU: (2) x64 AMD EPYC 7571
  Binaries:
    Node: 14.17.1 - ~/.nvm/versions/node/v14.17.1/bin/node
    Yarn: Not Found
    npm: 6.14.15 - ~/.nvm/versions/node/v14.17.1/bin/npm
  Browsers:
    Chrome: Not Found
    Firefox: Not Found
  npmPackages:
    react: ^16.13.1 => 16.14.0 (0.14.10, 15.7.0, 0.9.0)
    react-dom: ^16.13.1 => 16.14.0
    react-scripts: 5.0.0 => 5.0.0
  npmGlobalPackages:
    create-react-app: Not Found

Steps to reproduce

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Expected behavior

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Actual behavior

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Reproducible demo

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[ruslanzakh]

Have the same problem.

[nimsilva]

I have the same problem, I get these warnings when running npm start:

src\components\common\constants.js
  Line 0:  Parsing error: babel.loadPartialConfigSync is not a function

[hugoerortiz]

same error

[tarumam]

same here

[jccalbuquerque]

same here

[capndave]

same here

[tarumam]

Guys... that worked for me:
1 - installed the latest @babel/core
then my error changed to:
This experimental syntax requires enabling one of the following parser plugin(s): "jsx", "flow", "typescript".

2 - Updated my babel.config.js

module.exports = {
  presets: ["@babel/preset-env", "@babel/preset-react"],
};

3 - On ESLint Config:

 parser: @babel/eslint-parser,

Hi any update on this ? I am getting similar issue

[AugusteTomaseviciute]

@tarumam solution worked! :) Thanks

[mattdell]

I had to upgrade mine from version 7.6.4 to 7.21.0.

I'm guessing the function was added sometime between

[hlhygr]

same here.
I'm guessing it would appear in some versions?
anyway, @mattdell solution worked! Thanks

[JontyyYang]

I encountered this problem while maintaining an old project, what I did was to upgrade @babel/core to the latest version, which is currently 7.25.2