jquery - Implementing fixed position in javascript causes jitter in Safari when scrolling -


fixed position not work use case because fixed browser window , can in state text off screen right , can not it. anyways, have attempted use absolute positioning , adjusting "top" in javascript. works pretty in firefox , chrome, in safari content jitters when scroll.

http://jsfiddle.net/z8ufe/4/

<div class="fixed sticky" data-offset-top="50"><p>fixed</p></div>   $(document).ready(function() {     var documentheight = $(document).height();     $(document).scroll(function() {       var scrolltop = $(window).scrolltop();        $(".sticky").offset(function() {         $this = $(this);         var offsettop = $this.data("offset-top");          if (scrolltop < 0) {           scrolltop = 0;         }          var newtop = offsettop + scrolltop;         if (newtop < offsettop) {           newtop = offsettop;         }          // prevents document infinitely expanding.         var maxtop = documentheight - $this.height();         if (newtop > maxtop) {           newtop = maxtop         }          // prevents bit of jitter since current offset can         // not precisely initial offset. 338 vs. 338.12931923         var currenttop = $this.offset().top;         if ( math.abs(currenttop - newtop) >= 1 ) {           return { top: newtop }         } else {           return {}         }       });     }); })

i think understand trying achieve.

if keep fixed positioning on element , reposition horizontally javascript/jquery can keep smooth vertical scrolling , allow keep horizontal positioning:

$(function() {     var $sticky = $('.sticky');     var target  = 800;      $(document).scroll(function() {         var left = $(window).scrollleft();         var adj  = target - left;         $sticky.css({left: adj});     }); });

this uses scrollleft() horizontal counterpart scrolltop()

http://jsfiddle.net/z8ufe/18/


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