Could not find plugin "proposal-numeric-separator"

How to fix Could not find plugin "proposal-numeric-separator", I get this error when I try to build my React application, I have not ejected the application yet:

./src/index.js
Error: [BABEL] /home/pc/Downloads/project/src/index.js: Could not find plugin "proposal-numeric-separator". Ensure there is an entry in ./available-plugins.js for it. (While processing: "/home/pc/Downloads/project/node_modules/babel-preset-react-app/index.js$0")
    at Array.map (<anonymous>)
    at Generator.next (<anonymous>)
    at Generator.next (<anonymous>)


error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

I have tried to download Babel and the dependency Proposal Numeric Separator, remove the Node Modules, clean the Yarn cache; but nothing worked.

I'm using Yarn 1.22.4 and Node 13.11.0, but I have also tried with NPM 6.13.7.

Solution 1:

The following steps work:

Add the following line to package.json:

"resolutions": { 
  "@babel/preset-env": "7.5.5" 
},

Run the following command:

$ npx npm-force-resolutions

Install dependencies:

$ npm install
# or 
$ yarn

Build your project:

$ yarn build

Take a look at this Github Issue

Solution 2:

Try this, it works: npm i @babel/[email protected]

I have just used it like 10 minutes ago, and it's working fine.

Related issue going on github about this. Click Here!

Solution 3:

From the corresponding issue in create-react-app,

Update react-scripts to 3.4.1 in your package.json file and remove node_modules as well as package-lock.json/yarn.lock and re-install.

Solution 4:

Why this problem happened?:

It's an issue of conflicts between internal packages used by babel.

Adding a new plugin to @babel/compat-data breaks old @babel/preset-env versions. This is because preset-env iterates over compat-data's plugins, and throws if the plugin isn't defined in preset-env's available-plugins.js file.

This is the merge that fixed the issue: https://github.com/babel/babel/pull/11201/files/a88a00750c61ff89f1622d408d67108719f21ecd

Solution:

Delete package-lock.json or yarn.lock
Delete node_modules folder
In package.jon I have adjusted the version numbers of these packages to:

    ...
    "devDependencies": {
        "@babel/compat-data": "^7.8.0",
        "@babel/preset-env": "^7.8.0",
        "babel-loader": "^8.1.0",
        ...
    },
    ...
    "resolutions": {
        "@babel/preset-env": "^7.8.0"
    }

Run npm install
Run npm run build

Solution 5:

Reference: https://github.com/angular/angular-cli/issues/17262

I found two solution

a ) Install babel compat

"devDependencies": {
    "@babel/compat-data": "7.8.0",
}

b) Install plugin-proposal-numeric-separator

npm install --save-dev @babel/plugin-proposal-numeric-separator

install this version only 7.8.0

Angular CLI can create this kind of issue. Go to package json and change it to

build-angular": "0.803.17"

please don't add ^ or ~ .