javascript - Want to Change Settings in js while it crosses certain position -


i'm creating navbar & i'm using bootstrap this.

i'm using padding top 60px while nav transparent

enter image description here

here nav code

 .navbar-default .navbar-nav > li > {    padding-top: 60px;  }

and navbar-brand class 

 .navbar-brand{    padding-top:30px;  }  when navbar scrolls > 100 looks

enter image description here

now want make 30px when scroll > 100 here js code

 var = $(".navbar-default").offset().top;  $(document).on('scroll', function() {  if ($(this).scrolltop() > 100) {     $('.navbar-default').addclass("scrolled");     $(".navbar-default .navbar-brand").css({         "color": "#a96258"     });  }   else {     $('.navbar-default').removeclass("scrolled");     $(".navbar-default .navbar-brand").css({         "color": "#fff"     });   } });

my scrolled class

 .navbar-default.scrolled{    background-color: #fff;    border-bottom: 1px solid #bbb9be;    box-shadow: 0,0,2px,#bbb9be;    color: #000;    min-height: 80px;  }

try attaching window.scroll below:

$(window).scroll(function() {     if ($(window).scrolltop() > 100) {         $('.navbar-default').addclass("scrolled");         $(".navbar-default .navbar-brand").css({         "color": "#a96258"     });   }    else {     $('.navbar-default').removeclass("scrolled");     $(".navbar-default .navbar-brand").css({         "color": "#fff"     });   } });

or alternatively can add event listener below

var element = $(".navbar-default"); window.addeventlistener('scroll', function() {      $(window).scrolltop() > 100 ?       $(element).addclass('scrolled',function(){              $(".navbar-default .navbar-brand").css({                     "color": "#a96258"              });      }) :       $(element).removeclass('scrolled',function(){              $(".navbar-default .navbar-brand").css({                     "color": "#fff"              });      }); });

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