SWR&

SketchSystems.spec

SWR&
  Data
    success -> Fresh
    None
    Some
      Fresh
        after stale -> Stale
      Stale
  Transfer
    Pending
      success -> Done
      failure -> Failed
    Done
      after stale -> Pending
    Failed
      after retry -> Pending
      
    

SketchSystems_prototype.js

function render(model){
  let current_state_name = model.active_states.map(s => s.name);
  return $("h1",
           {style: {color: "darkBlue"}},
           `The current state is: ${current_state_name}`);
}