javascript - Firefox scrollTop problem -


i have problem firefox scrolltop value , onscroll event. works great in ie, safari , chrome firefox seems lag.

i tried update background position onscroll event, when take handle , drag , down quickly, firefox stops updating scrolltop value , causes lag in app.

you can try code , in firefox console when dragging handle , see values stops updating :

function savescrolllocation () {     console.log(document.documentelement.scrolltop); }  window.onscroll=savescrolllocation ;

any idea how make firefox respond more quickly?

there 2 ways handle - throttle (execute function set interval) , debounce (execute function after specified time has passed since last call). you'll want use throttling in situation.

a simplified solution may (updated: see @ http://jsfiddle.net/yvvnu/1/):

    window.onscroll=catchscroll;     var timeoutid = 0;     var jitterbuffer = 200;     function catchscroll()         {             if (timeoutid) cleartimeout (timeoutid);             timeoutid = settimeout(function(){savescrolllocation()}, jitterbuffer);         }      function savescrolllocation () {         console.log(document.documentelement.scrolltop);         alert('scrolled');     }

you can use jquery plugin: http://benalman.com/projects/jquery-throttle-debounce-plugin/


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