Could not find plugin “proposal-numeric-separator”

Question

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 y

Answer 1

In package.json

  "dependencies": {
    "@babel/compat-data": "7.8.0",
    "@babel/plugin-proposal-numeric-separator": "^7.8.3",
    "babel-loader": "^8.1.0",
  ....
  "resolutions": {
     "@babel/preset-env": "^7.8.7"
  }

it is working for me. You can read more

https://github.com/angular/angular-cli/issues/17262#issuecomment-603396857