T7210 - Babel Sourcemap issue example

This repo demonstrates the issue reported in https://phabricator.babeljs.io/T7210

Instructions

• Clone this repo
• npm install to install all dependencies
• npm start will build the files and start a webserver
• Open Chrome at http://localhost:8080/, open dev tools and refresh

Chrome won't let you to set a break point on line 4 of babelCurrent/demo.js, but it will let you do it for babel644/demo.js