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I'm not sure what the vision of the project is for this but even just having this basic functionality goes a long way for removing our dependence on GraphiQL - especially considering the share functionality doesn't work (see #793 )

This is a non-breaking change, people are free to use or not use these event hooks as they wish so I would appreciate if this was merged independent of whatever the vision of the project is for sharing Playground state.

@arush sign the licence

Hey @arush, can you please sign license? I will merge it then :) Thx

Sorry I don’t know how, GitHub won’t let me. Feel free to use my code though