Hey, I'm the author of the "GraphQL Visualizer" tool (http://nathanrandal.com/graphql-visualizer/) that they mention in the article as inspiration for their project.

This new project is quite nice and definitely a step up from mine.

Also wanted to mention that there is a CLI version of the visualizer at https://github.com/sheerun/graphqlviz for when you want to quickly visualize a GraphQL endpoint for documentation purposes, etc. Keep up the good work!