This page covers Elm 0.18
The plan for changing a player's level is as follows:
(1) When the user clicks the increase or decrease button we trigger a message
ChangeLevel with the
howMuch as payload.
(2) Html.program (which Navigation wraps) will send this message back to
Main.Update which will route it to
Players.Update will return a command to save the player, this command flows up to Html.program (5).
(6) The Elm runtime executes the command (trigger an API call) and we will get a result back, either a succesful save or a failure. In the success case we trigger a
SaveSuccess message with the updated player as payload.
Main.Update routes the
SaveSuccess message to
Players.Update we update the
players model and return it. This flows back to Html.program (9).
(10) Then Html.program will render the application with the updated model.