Aborting navigation with Meteor iron-router

Question

I have a (client-side) router in a Meteor app, and links using the {{pathFor}} helper.

I am setting a dirty flag in the Session

Answer 1

I found that rediecting in stop works, and works even when you aren't changing routes via Router.go (such as by links in my application).

Here is a coffeescript implementation using a class inherited from RouteController

class MyRouteController extends RouteController
  stop: ->
    # Save whether you data/form is dirty or whatever state you have in 
    # a Session variable.
    if Session.get('formIsDirty') 
      if !confirm('You have unsaved data. Are you sure you want to leave?')
        # Redirecting to the current route stops the current navigation.
        # Although, it does rerun the route, so it isn't a perfect solution.
        Router.go '/my_route'
        # Return here so we don't perform any more of the stop operation.
        return
    # Otherwise do as normal.
    super