This is a small "hello, world" demonstration of using Dancer 2 to serve GraphQL.
cpanm --installdeps .
plackup bin/app.psgi
Point your browser at http://localhost:5000
After clicking through to the GraphiQL tool, try entering this query in the upper left-hand pane:
{ helloWorld }
A complete revamp of this applet, simplifying, clarifying and adding a test, was contributed by Nick Tonkin https://github.com/1nickt