This is the core React component used in expressiontutor.org.
See src/components/ExpressionTreeEditor/
for up-to-date usage information.
To view the available components in a browser while developing them (supports hot code reload):
npm run start
Then open http://localhost:6060/. This is based on React Styleguidist.
There is a small number of tests you can run:
npm run test
This is based on Jest.