javascript - Prevent adding class without browser scroll -


this js add class while scroll browser page. problem after scroll browser top of page .darkheader class not remove, means want remove class after page scroll top.

js

lastscroll = 0; $(window).on('scroll',function() {         var scroll = $(window).scrolltop();     if(lastscroll - scroll > 0) {         $(".nav").addclass("darkheader");     } else {         $(".nav").removeclass("darkheader");     }     lastscroll = scroll; });

jsfiddle >>

how remove .darkheader class after page has scroll on top of page/head? how prevent adding class without browser scrolling?

you add condition checks if scrolling @ top of page, , removes class this:

    if(scroll === 0){         $(".nav").removeclass("darkheader");     } else if(lastscroll - scroll > 0) {         $(".nav").addclass("darkheader");     } else {         $(".nav").removeclass("darkheader");     }

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