javascript - Get actual height of document with jQuery -

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i have problem jquery plugin, want display footer in specific way right before end of page. actual bottom position , compare height of entire body.

but there problem jquery function height() return bad value. example know site has height of 5515px function returns me value: 8142px

i use plugin mcustomscrollbar in few places on page, , think may cause problem. can't disable it, because page has elements require good.

my code:

(function($){     $.fn.scrollingelements = function(){         var height = $(window).height();         var max_height = $(document).height();         var prev_top = $(window).scrolltop();         var prev_bottom = top + height;         $(window).scroll(function(){             var top = $(window).scrolltop();             var bottom = top + height;              console.log(max_height, bottom);              if(prev_top < height && top > height){                 // console.log('show header', 'show sticky', 'show footer small');             }             if(prev_top > height && top < height){                 // console.log('hide header', 'hide sticky', 'hide footer');             }             if(prev_top < 2*height && top > 2*height){                 // console.log('show sroll top');             }             if(prev_top > 2*height && top < 2*height){                 // console.log('hide scroll top');             }              if(prev_bottom < max_height - 100 && bottom > max_height - 100){                 // console.log('show footer large');             }             if(prev_bottom > max_height - 100 && bottom < max_height - 100){                 // console.log('show footer small');             }              prev_top = top;             prev_bottom = bottom;          });         $(window).resize(function(){             height = $(window).height();         });     } })(jquery);

answering tommy riordan: changing $(document).height() document.body.clientheight didn't work still getting bad results. tried using $('body').height() same effect.

please use

document

instead of window example :

$(window).resize(function(){ height = $(document).height(); });


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