jquery - Hide header on scroll down,show it on scroll up(not working) -

i have problem,which showed yesterday,after added new div page elements (wrapper) make slide , push effect on mobile menu design.after made div , fixed overflows , stuff,i noticed header function isn't working anymore..if know wrong please correct me,i paste header jquery , style.if need info wrapper div,just give info need me.thanks !

$(document).ready(function($) {  	"use strict";    	var mql = 1170;    	//primary navigation slide-in effect  	if($(window).width() > mql) {  		var headerheight = $('.site-header').height();  		$(window).on('scroll',  		{  	        previoustop: 0  	    },  	    function () {  		    var currenttop = $(window).scrolltop();  		    //check if user scrolling  		    if (currenttop < this.previoustop ) {  		    	//if scrolling up...  		    	if (currenttop > 0 && $('.site-header').hasclass('is-fixed')) {  		    		$('.site-header').addclass('is-visible');  		    	} else {  		    		$('.site-header').removeclass('is-visible is-fixed');  		    	}  		    } else {  		    	//if scrolling down...  		    	$('.site-header').removeclass('is-visible');  		    	if( currenttop > headerheight && !$('.site-header').hasclass('is-fixed')) $('.site-header').addclass('is-fixed');  		    }  		    this.previoustop = currenttop;  		});  	}

.admin-bar .site-header {    top: -80px;  }  .admin-bar .site-header.is-fixed {    top: -160px;  }  .site-header {  position:absolute;    top: 0;    left: 0;   right:0;    height: 80px;    z-index: 4;    border-bottom: 1px solid #eee;  }    @media screen , (min-width: 40em) {    .site-header {      -webkit-transition: background-color 0.3s;      -moz-transition: background-color 0.3s;      transition: background-color 0.3s;      /* force hardware acceleration in webkit */      -webkit-transform: translate3d(0, 0, 0);      -moz-transform: translate3d(0, 0, 0);      -ms-transform: translate3d(0, 0, 0);      -o-transform: translate3d(0, 0, 0);      transform: translate3d(0, 0, 0);      -webkit-backface-visibility: hidden;      backface-visibility: hidden;    }    .site-header.is-fixed {      /* when user scrolls down, hide header right above viewport */      position: fixed;      top: -80px;      background-color: rgba(255, 255, 255, 0.8);      -webkit-transition: -webkit-transform 0.3s;      -moz-transition: -moz-transform 0.3s;      transition: transform 0.3s;    }    .site-header.is-visible {      /* if user changes scrolling direction, show header */      -webkit-transform: translate3d(0, 100%, 0);      -moz-transform: translate3d(0, 100%, 0);      -ms-transform: translate3d(0, 100%, 0);      -o-transform: translate3d(0, 100%, 0);      transform: translate3d(0, 100%, 0);    }    .site-header.menu-is-open {      /* add background color header when navigation open */      background-color: transparent;    }  }

<header id="masthead" class="site-header" role="banner">  <span class="mobile-icon"></span>  			<div class="site-branding">  				<!--logo , branding script,which think uselless problem,so won't show slow -->  				    <h1 class="site-title"><a href="<?php echo esc_url( home_url( '/' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a></h1><?php endif; ?>				  		</div>

it giving me error here ;/