javascript - Responsive scrolltop -


im using following code detect when object should become 'sticky' , stay fixed in content.

var $window = $(window),     $stickyel = $('#single-post-details'),     eltop = $stickyel.offset().top;  $window.scroll(function() {     $stickyel.toggleclass('sticky', $window.scrolltop() + 52 > eltop); });

however make responsive. means somehow needs detect height of banner above first doesn't trigger @ wrong point.. here fiddle example.

the problem on resize, top position of sticky element change. solve that, should not check height of image, recalculate top position.

the use of .resize event usefull here. on callback, update global variable : 

var $window = $(window),     $stickyel = $('#single-post-details'),     eltop = $stickyel.offset().top;  $window.on({     resize : function(){         eltop = $stickyel.offset().top;         $window.trigger('scroll');     },     scroll : function() {         $stickyel.toggleclass('sticky', $window.scrolltop() + 20 > eltop);     } });

note: trigger('scroll') important prevent sticky element go on image while expanding window.

fiddle


Comments

Post a Comment

Popular posts from this blog

Python Kivy ListView: How to delete selected ListItemButton? -

Image
i'm trying learn kivy building simple todo-list app suggested dusty phillips, author of book "creating apps in kivy". this code far: from kivy.app import app kivy.uix.boxlayout import boxlayout kivy.properties import objectproperty kivy.uix.listview import listitembutton class taskbutton(listitembutton): pass class todoroot(boxlayout): task_input = objectproperty() task_list = objectproperty() def add_task(self): self.task_list.adapter.data.extend([self.task_input.text]) self.task_list._trigger_reset_populate() def del_task(self): pass class todoapp(app): def build(self): return todoroot() if __name__ == '__main__': todoapp().run() and kv file: #: import main todo #: import listadapter kivy.adapters.listadapter.listadapter #: import listitembutton kivy.uix.listview.listitembutton todoroot: <todoroot>: orientation: "vertical" task_input: task_input_view t...
Read more

asp.net mvc 4 - A specified Include path is not valid. The EntityType '' does not declare a navigation property with the name '' -

i wonder if help. above error when call .include() . breaks when include tblmemberships . this.dbcontext.configuration.lazyloadingenabled = false; list<tblcustomerinfo> customers = this.dbcontext.tblcustomerinfoes.include("tblusers").include("tblmemberships").tolist(); the reason because navigation property between tblcustomerinfo , tblmemberships not exist. tblusers link between other 2 tables. customer -- 1:* -- user -- 1:* -- membership (sorry, can't include image reputataion < 10). my questions are: what need in order have tblmemberships included? is recommended way of retrieve data or should break 2 queries? or design totally rubbish? i using ef5, asp .net mvc 4 kindly advise. thank you. when write code this: db.parenttable .include("childtable") .include("childofchildtable"); you saying include entries childtable keyed parenttable , include entries childofchildtable keyed paren...
Read more