I've set up a simple Babel based boilerplate that allows you to dig into JS module development straight away.
In order to fetch the boilerplate your project needs, clone it as follows:
git clone https://github.com/mazehall/my-new-es-module.git myModule
This will create a new directory, myModule. Inside it you can find everything you need to get ahead.
To make it your very own new project cleanup the git link.
cd myModule
rm -rf .git
git init
git add .
git commit -am "Initial commit"
After this process you have a fresh project to work against.
This very simple examle uses the testing solution Jest.
If you want to remove it, delete the lines in package.json and .eslintrc.
The test file itself is located in src/myNewModule.test.js.