Toggle flag

script

//TOGGLE FLAG
var d = draft.content;
var toggleStatus = draft.isFlagged;

if (toggleStatus == true) {
  draft.isFlagged = false;
  var message = "Un-Flagged";
} else {
  draft.isFlagged = true;
  var message = "Flagged";
}
draft.update();

var status = app.displaySuccessMessage(message);