hyperConsole lets you instantly load popular JS libraries into devTools, so you can experiment with them. You can load multiple libraries at a time.
You can also launch a blank page with those libraries loaded, ready to experiment.
The libraries available are sourced from cdnjs.com.
I built a tool that helps people learn about alternative voting, and try it out. As of now, I've added potential candidates for the 2020 Democratic primaries.
Instant Runoff Voting is an alternative to the First-Past-The-Post systems that people are familiar with. It's a type of ranked voting system, and it seeks to avoid spoiler effects.