Paperback 
ButtonVR
A minimal button for use in VR.
Triggered just by looking at it.
It uses 3D objects as buttons.
https://github.com/Sean-Bradley/ButtonVR
You can download the project and view the examples.
git clone https://github.com/Sean-Bradley/ButtonVR.git
cd ButtonVR
npm install
npm run dev
Visit https://127.0.0.1:8080/
Note that the above URL is HTTPS. When developing WebVR locally, you will need an SSL certificate. This project auto creates a self signed certificate that you will need to accept when visiting the development URL in the browser.
Example 1
Basic ButtonVR Demo.
Example 2
Basic Keyboard Demo.
