coffeescript - How can I detect a Router change in Meteor template to enable browser back behaviour? -

i have created pagination configurable limit. getting page number ironrouter. code works when enter url manually different page numbers. however, when use go browser button, change url , can see beforeaction , action being logged console doesn't trigger template update/re-render.

iron route defined follow:

@route "/posts/page/:pagenum",     name: "posts.page"     template: "posts"     layouttemplate: "default_layout"     onbeforeaction: () ->       console.log 'beforeaction', @params.pagenum, @       @next()     action: () ->       console.log 'inside action', @, @state.get 'pagenum'       @render() 

template oncreated code:

template.posts.oncreated ->   limit = 10   currpage = router.current().state.get('pagenum') || 1    self = @   @itemsperpage = new reactivevar limit   @currpage = new reactivevar parseint currpage, 10    @autorun ->     handle = self.subscribe "posts",       limit: self.itemsperpage.get()       ,page: self.currpage.get()     yes 

navigation code updates posts doesn't update when using browser button:

'click .pager-page': (e,t) ->   e.preventdefault()   gotopage = parseint e.currenttarget.dataset.pagerpage, 10   t.currpage.set gotopage   router.go 'posts.page', pagenum: gotopage 

i solved using state reactivity variables on route

updated route below

onbeforeaction: () ->   @state.set 'pagenum', @params.pagenum   @next()   yes 

and fetching inside template's autorun

@autorun ->   handle = self.subscribe "posts",     limit: self.itemsperpage.get()     ,page: +router.current().state.get('pagenum')   yes