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【JavaScript】hamburgerMenuのコード

Last updated at 2020-01-13Posted at 2020-01-04

filename.html

<body>
  <header>
    <nav class="global-nav">
      <ul class="global-nav__list">
	<li class="global-nav__item">
          <a href="">会社概要</a>
        </li>
	<li class="global-nav__item"><a href="">サービス</a></li>
	<li class="global-nav__item"><a href="">採用情報</a></li>
	<li class="global-nav__item"><a href="">アクセス</a></li>
	<li class="global-nav__item"><a href="">お問い合わせ</a></li>
      </ul>
    </nav>
		
        <div class="hamburger" id="js-hamburger">
          <span class="hamburger__line hamburger__line--1"></span>
          <span class="hamburger__line hamburger__line--2"></span>
          <span class="hamburger__line hamburger__line--3"></span>
        </div>
        <div class="black-bg" id="js-black-bg"></div>
  </header>
  
  <script src="humberger.js"></script>
</body>

filename.css


.global-nav {
  position: fixed;
  right: -320px; /* これで隠れる */
  top: 0;
  width: 300px; /* スマホに収まるくらい */
  height: 100vh;
  padding-top: 40px;
  background-color: #fff;
  transition: all .6s;
  z-index: 900;
  overflow-y: auto; /* メニューが多くなったらスクロールできるように */
}
.hamburger {
  position: absolute;
  right: 0;
  top: 0;
  width: 50px; /* クリックしやすいようにちゃんと幅を指定する */
  height: 50px; /* クリックしやすいようにちゃんと高さを指定する */
  cursor: pointer;
  z-index: 600;
}
.global-nav__list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.global-nav__item {
  text-align: center;
  padding: 0 -2px;
  line-height: 500%;
}
.global-nav__item a {
  display: block;
  padding: -2px 0;
  border-bottom: 1px solid #eee;
  text-decoration: none;
  color: #111;
}
.global-nav__item a:hover {
  background-color: #eee;
}
.hamburger__line {
  position: absolute;
  left: 11px;
  width: 18px;
  height: 1px;
  background-color: #111;
  transition: all .6;
}
.hamburger__line--1 {
  top: 14px;
}
.hamburger__line--2 {
  top: 20px;
}
.hamburger__line--3 {
  top: 26px;
}
.black-bg {
  position: fixed;
  left: 0;
  top: 0;
  width: 100vw;
  height: 100vh;
  z-index: 100;
  background-color: #000;
  opacity: 0;
  visibility: hidden;
  transition: all .6s;
  cursor: pointer;
}
/* 表示された時用のCSS */
.nav-open .global-nav {
  right: 0;
}
.nav-open .black-bg {
  opacity: .8;
  visibility: visible;
}
.nav-open .hamburger__line--1 {
  transform: rotate(45deg);
  top: 20px;
}
.nav-open .hamburger__line--2 {
  width: 0;
  left: 50%;
}
.nav-open .hamburger__line--3 {
  transform: rotate(-45deg);
  top: 20px;
}

filename.js

function toggleNav() {
  var body = document.body;
  var hamburger = document.getElementById('js-hamburger');
  var blackBg = document.getElementById('js-black-bg');

  hamburger.addEventListener('click', function() {
    body.classList.toggle('nav-open');
  });
  blackBg.addEventListener('click', function() {
    body.classList.remove('nav-open');
  });
}
toggleNav();

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