This fixes an issue with the use of super method calls in class private methods. See https://github.com/babel/babel/issues/9580 for more info re: behavior of the bug.
@babel/helper-create-class-features-plugin
Compile class public and private fields, private methods and decorators to ES6
See our website @babel/helper-create-class-features-plugin for more information.
Install
Using npm:
npm install --save-dev @babel/helper-create-class-features-plugin
or using yarn:
yarn add @babel/helper-create-class-features-plugin --dev