gistfile1.coffee

  replaceCurrentRoute: (params) ->
    params = Batman.extend({}, params)
    # ...

    currentPageParams = @routableParams(params) # loads some more data (controller and action)
    # ...

    path = Shopify.get('dispatcher').pathFromParams(currentPageParams)
    return unless path

    currentPath = Shopify.get('navigator')?.pathFromLocation(window.location)
    @_navigate(currentPath, path)
    params

  _navigate: (currentPath, newPath) ->
    currentPathWithoutQuery = currentPath?.split('?')[0]
    newPathWithoutQuery = newPath?.split('?')[0]

    if currentPathWithoutQuery == newPathWithoutQuery
      Shopify.get('navigator')?.replaceState {}, null, newPath
    else
      Shopify.get('navigator')?.pushState {}, null, newPath