Wrapper	Description
Simulation	Shows the simulation without any data streams or iframes.
Instance Proxies	Shows all of the instrumented instances in a simulation, with their corresponding IDs, types and a basic functionality for testing interacting with them. This also provides a "Generate HTML" feature which can be used to create a customized simulation or to generate a template/starting point for developing new wrappers.
Events: colorized	Shows the PhET-iO Event Stream in the console, colorized and optimized for human readability. The console must be open to see this data. Chrome/Firefox only.
Events: JSON	Shows the PhET-iO Event Stream in the console, formatted in JSON, suitable for machine parsing and analysis. The console must be open to see this data.
Events: textarea	Shows the PhET-iO Event Stream in the wrapper frame instead of the console.
Events: recording	The simulation is embedded in a full-size iframe and emits events to the console. Query parameters can be added to redirect the data stream to another location.
State	Shows a JSON object representing the simulation's state, and immediately sets the state to a copy of the simulation for testing the ability to set state to a simulation. Provides a "Launch" button to launch another copy of the simulation with the given state using Query Parameters.
Mirror Inputs	Shows the Scenery input event stream in the console and mirrors the events to a copy of the simulation, to test for visual playback (like a recorded screen capture).
Screenshot	Shows a "Screenshot" button that can be used to capture and display screenshots from a live simulation.
Active	Shows a button that enables the user to toggle whether a simulation is active (running and taking user input) or inactive (paused and not accepting user input).

Validate Tandems

PhET-iO Developer's Guide for this simulation.