ハンバーガーメニュ

ハンバーガーメニューの実装 (by yachin29)

<nav>
<div id="btn">
<span id="hum"></span>
</div>
<ul>
<li><a href="#">Home</a></li>
<li><a href="#">Shop</a></li>
<li><a href="#">Collections</a></li>
<li><a href="#">Philosophy</a></li>
<li><a href="#">Press</a></li>
<li><a href="#">About</a></li>
</ul>
</nav>

スタイルシート

@media screen and (max-width:767px){
#btn {
width: 40px;
height: 40px;
border: 1px solid #000;
border-radius: 4px;
position: relative;
margin-left: 20px;
}
#hum {
  display: block;
  width: 30px;
  height: 2px;
  background: #000;
  position: absolute;
  top:0;
  right: 0;
  bottom: 0;
  left: 0;
  margin: auto;
  transition: 0.2s;
}
#hum:before {
  display: block;
  content: "";
  width: 30px;
  height: 2px;
  background: #000;
  position: absolute;
  top:-20px;
  right: 0;
  bottom: 0;
  left: 0;
  margin: auto;
  transition: 0.2s;
}
#hum:after {
  display: block;
  content: "";
  width: 30px;
  height: 2px;
  background: #000;
  position: absolute;
  top:0;
  right: 0;
  bottom: -20px;
  left: 0;
  margin: auto;
  transition: 0.2s;
}

#hum.click {
  background: transparent;
}
#hum.click:before {
  top:0;
  transform: rotate(45deg);
}
#hum.click:after {
  bottom: 0;
  transform: rotate(135deg);
}

nav ul {
  width:100%;
  position: fixed;
  top: 60px;
  padding-left: 10px;
  background:#f0ede7;
  display: none;
}
nav li {
  float:none;
  width:100%;
  line-height: 30px;
}
nav li a {
  text-align:left;
}
nav li a:hover {
  border-bottom: none;
  padding-bottom:0;
}

header.fixed h1 {
display: none;
}
}

// JavaScript Document

$(function() {
  if(window.innerWidth > 767){
				$(window).scroll(function() {
					if ($(window).scrollTop() > 10) {
						$('header').addClass('fixed').slideDown(900);
					} else {
						$('header').removeClass('fixed');
					}
				});
  }
$('#btn').on('click touchstart',function(){
	$('#hum').not(':animated').toggleClass('click');
	$('nav ul').not(':animated').slideToggle(200);
	});
});

修正後のjQuery

// JavaScript Document

$(function() {
  if(window.innerWidth > 767){
				var $header = $('header');
				$(window).scroll(function() {
					if ($(window).scrollTop() > 160) {
						$header.addClass('fixed');
					} else {
						$header.removeClass('fixed');
					}
				});
  }
$('#btn').on('click touchstart',function(){
if($(window).innerWidth() <= 767){
  $('#hum').not(':animated').toggleClass('click');
  $('nav ul').not(':animated').slideToggle(200);
  };
});
$(window).resize(function(){
  $('nav ul').hide();//スマホの時
if($(window).innerWidth() > 768){ 
 $('nav ul').show();//タブレット以上の時
 $('#hum').removeClass('click');//PCから戻る時に邪魔な.clickを削除するため
 } 
});
});