Auto-save

is_deleted

yep

SketchSystems.spec

Auto-save
  Idle*
    change -> Saving
  Saving
    response -> Idle
    change -> Debounce Pending
  Debounce Pending
    change -> Debounce Pending
    timeout -> Pending
    response -> Debouncing
  Pending
    response -> Saving
    change -> Debounce Pending
  Debouncing
    timeout -> Saving
    change -> Debouncing

SketchSystems_prototype.js

let debounceId
let revId = 0

function render(model){
  let activeState = model.active_states[0].name

  if (activeState === 'Saving') {
    revId += 1
    setTimeout((id => () => id === revId && model.emit('response'))(revId), 3000)
  }

  if (activeState === 'Debouncing' || activeState === 'Debounce Pending') {
    clearTimeout(debounceId)
    debounceId = setTimeout(() => model.emit('timeout'), 500)
  }
  
  return (<>
    Rev: {revId}<br />{activeState}<br />
    <textArea onChange={() => model.emit('change')}></textArea>
  </>)
}