A-Frame is a powerful web framework for developing web-based experiences ranging from AR to VR. A-Frame is used with Glitch. Through html, different interactions and experiences can be built. A-Frame has many examples that can be "remixed" via a button found on Glitch to allow you to edit and try out the examples yourself.
To get started with A-Frame, visit their home . page.
We recommend starting with their "Hello World" example to get a feel of what capabilites can be found via their A-Frame School , which is their interactive WebVR course.