Track previous route in iron router

gistfile1.txt

Routes = {};

/**
 * The current route's name
 */
Routes.name = function () {
  return Router.current().route.getName();
};

var routeNameAfterLastAction = null;
var previousNameVar = new ReactiveVar(null);

/*
 * The previous route's name
 */
Routes.previousName = function () {
  return previousNameVar.get();
};

Router.onBeforeAction(function () {
  var routeName = Routes.name();
  if (routeNameAfterLastAction !== routeName && routeNameAfterLastAction !== previousNameVar.get()) {
    previousNameVar.set(routeNameAfterLastAction);
  }

  this.next();
});

Router.onAfterAction(function () {
  // Wait until afterFlush in case there are redirects.
  Tracker.afterFlush(function () {
    routeNameAfterLastAction = Routes.name();
  });
});