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 my angular 8 application, although I did not have any direct dependancy of react-scripts package and did not have it in package.json either but started getting this error on build. It was likely used as a depedancy by other packges.

By reading this post on github, I added it as dependancy in package.json "react-scripts": "3.4.1" and run npm install the build started working just fine.