For clarity, by user input it handles the callback of the map being clicked to delegate which tool it's going to use and to update the budget etc... I was excit

For clarity, by user input it handles the callback of the map being clicked to delegate which tool it's going to use and to update the budget etc... I was excited at first to see all the event handlers setup in a thread that wasn't the UI thread because event handlers are expensive but that doesn't appear to be the case. AFAIK webworkers are fairly isolated so something like setting up event handlers would not be possible.