After checking out the project to your local harddrive, just install all needed dependencies with npm:

npm install

Because ES6 is used for writing the JavaScript code, you need to transpile the code into ES5. You can easily do that with the help of gulp:

gulp

To make the development a lot more comfortable, you can also start a code watcher with gulp. It will automatically transpile the JavaScript code to ES5 whenever it detects a change:

gulp watch

To make sure the code works properly, you can run unit tests with

npm test

Just choose two versions of your software project (based on GIT) and the type of view:

You can compare the two versions either side by side ...

... or in a merged view:

You can filter for specific properties of your classes ...

... and map different types of metrics to your personal visualization.

Of course, you can also search for certain files in your project and highlight them in the visualization