Responsive Fixed Off-canvas Menuの使い方

下記ページの｢Download｣よりファイル1式をダウンロード。
Responsive Fixed Off-canvas Menu
ダウンロードしたファイルを任意の場所にコピー。

動作させるファイル（サンプルではindex.html）にコードを記述。
＜パスは上記ファイル構成の場合なので環境にあわせて変更＞
・head部分にf外部化したcssファイルを読み込ませるためのコードを記述。

<head>
<!--外部化したcssファイル-->
<link rel="stylesheet" type="text/css" href="css/Responsive Fixed Off-canvas Menu.css">
</head>

サンプルのResponsive Fixed Off-canvas Menu.cssコード（サンプルのcssは改変しています）

/*ページ設定部分（style.cssなどで設定していれば削除する）*/
body, ul, li {
	margin: 0;
	padding: 0;
	border: 0;
}
a {
	color: #fff;
	text-decoration: none;
	font-weight: bold;
}
a:hover {
	text-decoration: none;
}
/*ここまでページ設定部分*/


/*ここからResponsive Fixed Off-canvas Menuの設定*/
.wrapper {
	width: 94%;
	max-width: 1140px;
	margin: 0 auto;
}
.wrapper-small {
	max-width: 728px;
}
.wrapper-flush {
	width: 100%;
}
/**
 * Navigation
 */

.nav {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	z-index: 10000;
	background-color: #efefef;
}
/**
* Nav container
* 1. Ensure this slides in below parent
* 2. Hide by default
* 3. Smoother scrolling experience on iOS
*/

.nav-container {
	position: fixed;
	top: 60px; /* 1 */
	left: 0;
	z-index: 9999;
	overflow-y: auto;
	visibility: hidden; /* 2 */
	width: 100%;
	height: 100%;
	min-height: 100%;
	margin: 0;
	padding: 0;
	-webkit-transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1) 0s;
	transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1) 0s;
	-webkit-transform: translateX(-100%);
	-ms-transform: translateX(-100%);
	transform: translateX(-100%); /* 2 */
	background-color: #c0c0c0;
	-webkit-overflow-scrolling: touch; /* 3 */
}
/* 1. Show when `.is-visible` class is added */

.nav-container.is-visible {
	visibility: visible; /* 1 */
	-webkit-transform: translateX(0);
	-ms-transform: translateX(0);
	transform: translateX(0); /* 1 */
}
/* Nav toggle */

.nav-toggle {
	line-height: 1;
	display: inline-block;
	padding: 1.25rem 1rem;
	border: 0;
	background-color: #e74c3c;
}
/* Nav toggle icon */

.nav-toggle .icon-menu {
	position: relative;
	display: inline-block;
	width: 28px;
	height: 20px;
	vertical-align: middle;
	fill: none;
}
/* Nav toggle icon lines */

.icon-menu .line {
	position: absolute;
	left: 0;
	display: block;
	width: 100%;
	height: 4px;
	-webkit-transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1.000);
	transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1.000);
	-webkit-transition-timing-function: cubic-bezier(0.645, 0.045, 0.355, 1.000);
	transition-timing-function: cubic-bezier(0.645, 0.045, 0.355, 1.000);
	background-color: #fff;
}
/* Nav toggle icon line 1 */

.icon-menu .line-1 {
	top: 0;
}
/* When active, rotate line 1 to be lefthand part of X */

.is-active .icon-menu .line-1 {
	-webkit-transform: translateY(8px) translateX(0) rotate(45deg);
	-ms-transform: translateY(8px) translateX(0) rotate(45deg);
	transform: translateY(8px) translateX(0) rotate(45deg);
}
/* Nav toggle icon line 2 */

.icon-menu .line-2 {
	top: 50%;
	margin-top: -2px;
}
/* When active, hide line 2 */

.is-active .icon-menu .line-2 {
	opacity: 0;
}
/* Nav toggle icon line 3 */

.icon-menu .line-3 {
	bottom: 0;
}
/* When active, rotate line 3 to be righthand part of X */

.is-active .icon-menu .line-3 {
	-webkit-transform: translateY(-8px) translateX(0) rotate(-45deg);
	-ms-transform: translateY(-8px) translateX(0) rotate(-45deg);
	transform: translateY(-8px) translateX(0) rotate(-45deg);
}
/* Remove default list styles for menus */

.menu {
	list-style: none;
	margin: 0;
	padding: 0;
}
/**
* 1. Give menu a lighter background than its container
* 2. Prevent menu text from being accidentally highlighted
*/

.nav-menu {
	background-color: #555; /* 1 */
	-webkit-user-select: none;
	-moz-user-select: none;
	-ms-user-select: none;
	user-select: none;         /* 2 */
}
/* Give menu items a top border */

.nav-menu .menu-item {
	border-top: 1px solid #bbb;
}
/* Give last menu item a bottom border */

.nav-menu > .menu-item:last-child {
	border-bottom: 1px solid #bbb;
}
/* Darker background color on hover, and when toggled */

.nav-menu > .menu-item:hover, .nav-menu > .menu-item.is-active {
	background-color: #d0d0d0;
}
/* 1. Menu links are block level, by default */

.nav-menu .menu-link {
	display: block; /* 1 */
	text-decoration: none;
	color: #fff;
	padding: 0.75rem 1rem;
}
/* 1. Menu items with dropdowns appear clickable */

.has-dropdown {
	position: relative;
	cursor: pointer; /* 1 */
}
/* 1. Parent menu links inlined so you can toggle the dropdown */

.has-dropdown > .menu-link {
	display: inline-block;
}
/* 1. Add an icon to menu items that have sub menus */

.has-dropdown:after {
	font-size: 32px;
	position: absolute;
	top: 0;
	right: 1rem;
	bottom: 0;
	content: "+"; /* 1 */
	color: #fff;
}
/* 1. Switch icon to n-dash when toggled */

.has-dropdown.is-active:after {
	content: "\2013"; /* 1 */
}
/**
 * Dropdowns
 * 1. Hide dropdowns by default
 */

.nav-dropdown {
	display: none; /* 1 */
	background-color: #fff;
}
/* 1. Show dropdown when toggled */

.has-dropdown.is-active > .nav-dropdown {
	display: block; /* 1 */
}
/* 2nd level dropdown */

.nav-dropdown .nav-dropdown {
	background-color: #aaa;
}
.nav-dropdown .menu-item {
	border-color: #a0a0a0;
}
.nav-dropdown .nav-dropdown .menu-item {
	background-color: #b0b0b0;
	border-color: #909090;
}
/* Main content area */

.content {
	margin-top: 60px;
}
.content .wrapper {
	padding: 1rem 0;
}

@media (min-width: 960px) {
.nav {
	background-color: #555;
}
.nav, .nav-container, .nav-container.is-visible {
	position: static;
	top: auto;
	left: auto;
	z-index: auto;
	-webkit-transform: translateX(0);
	-ms-transform: translateX(0);
	transform: translateX(0);
}
.nav-container, .nav-container.is-visible {
	visibility: visible;
	height: auto;
	min-height: 0;
	overflow-y: visible;
}
.nav-toggle {
	display: none;
}
/* 1. Display menu items inline */

.nav-menu > .menu-item, .nav-menu > .menu-item.is-active {
	display: inline-block; /* 1 */
	background-color: transparent;
	border: 0;
}
/* Remove bottom border on last child */

.nav-menu > .menu-item:last-child {
	border: 0;
}
.nav-menu .menu-item {
	-webkit-transition: background-color 0.15s ease-in-out, color 0.15s ease-in-out;
	transition: background-color 0.15s ease-in-out, color 0.15s ease-in-out;
}
/* Remove +/- icons */

.has-dropdown:after {
	content: "" !important;
}
/* Add a caret to top-level menu items that have dropdowns */

.nav-menu > .has-dropdown:after {
	position: absolute;
	top: 50%;
	right: 1rem;
	width: 0;
	height: 0;
	margin-top: -2px;
	margin-left: -4px;
	content: "";
	border-width: 5px 5px 0 5px;
	border-style: solid;
	border-color: #444 transparent transparent transparent;
}
/* Increase padding to compensate for caret */

.has-dropdown > .menu-link {
	padding-right: 2rem;
}
/* Re-style dropdowns for larger screens */

.nav-dropdown {
	display: block;
	opacity: 0;
	position: absolute;
	top: 100%;
	width: 200px;
	margin: 0;
	padding: 0.5rem 0;
	background-color: #555;
	box-shadow: 0 0 4px hsla(0, 0%, 0%, 0.15);
	visibility: hidden;
	-webkit-transition: visibility 0s linear 0.25s, opacity 0.25s linear;
	transition: visibility 0s linear 0.25s, opacity 0.25s linear;
}
.has-dropdown:hover > .nav-dropdown {
	visibility: visible;
	opacity: 1;
	-webkit-transition-delay: 0s;
	transition-delay: 0s;
}
.nav-dropdown .menu-item {
	border: 0;
}
.nav-dropdown .menu-item:hover, .nav-dropdown .nav-dropdown .menu-item:hover {
	background-color: #d0d0d0;
}
.nav-dropdown .nav-dropdown, .nav-dropdown .nav-dropdown .menu-item {
	background-color: #555;
}
.nav-dropdown .nav-dropdown {
	z-index: 9998;
	top: 0;
	left: 100%;
}
.content {
	margin-top: 0;
}
}

・</body>の直前に外部化したjsファイルを読み込ませるためのコードを記述。

<!--googleのCDN（ネットワーク経由でコンテンツを提供するサービス）よりjqueryをロード-->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!--外部化したjsファイル-->
<script src="js/Responsive Fixed Off-canvas Menu.js"></script>
</body>

・<body></body>内にコードを記述

<nav class="nav is-fixed" role="navigation">
  <div class="wrapper wrapper-flush">
    <button class="nav-toggle">
    <div class="icon-menu"> <span class="line line-1"></span> <span class="line line-2"></span> <span class="line line-3"></span> </div>
    </button>
    <div class="nav-container">
      <ul class="nav-menu menu">
        <li class="menu-item has-dropdown"> <a href="#!" class="menu-link">Home</a>
          <ul class="nav-dropdown menu">
            <li class="menu-item"> <a href="#!" class="menu-link">jQuery</a> </li>
            <li class="menu-item has-dropdown"> <a href="#!" class="menu-link">Front-end</a>
              <ul class="nav-dropdown menu">
                <li class="menu-item"><a href="#!" class="menu-link">Html5</a></li>
                <li class="menu-item"><a href="#!" class="menu-link">CSS3</a></li>
                <li class="menu-item"><a href="#!" class="menu-link">Javascript</a></li>
              </ul>
            </li>
            <li class="menu-item"> <a href="#!" class="menu-link">jQueryScript</a> </li>
          </ul>
        </li>
        <li class="menu-item"> <a href="#!" class="menu-link">Blog</a> </li>
        <li class="menu-item"> <a href="#!" class="menu-link">Contact</a> </li>
        <li class="menu-item"> <a href="#!" class="menu-link">About</a> </li>
      </ul>
    </div>
  </div>
</nav>

サンプルのhtmlコード

<!DOCTYPE html>
<html lang="ja">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta charset="utf-8" />
<title>Responsive Fixed Off-canvas Menu</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<link rel="stylesheet" href="css/Responsive Fixed Off-canvas Menu.css">
</head>

<body>
<nav class="nav is-fixed" role="navigation">
  <div class="wrapper wrapper-flush">
    <button class="nav-toggle">
    <div class="icon-menu"> <span class="line line-1"></span> <span class="line line-2"></span> <span class="line line-3"></span> </div>
    </button>
    <div class="nav-container">
      <ul class="nav-menu menu">
        <li class="menu-item has-dropdown"> <a href="#!" class="menu-link">Home</a>
          <ul class="nav-dropdown menu">
            <li class="menu-item"> <a href="#!" class="menu-link">jQuery</a> </li>
            <li class="menu-item has-dropdown"> <a href="#!" class="menu-link">Front-end</a>
              <ul class="nav-dropdown menu">
                <li class="menu-item"><a href="#!" class="menu-link">Html5</a></li>
                <li class="menu-item"><a href="#!" class="menu-link">CSS3</a></li>
                <li class="menu-item"><a href="#!" class="menu-link">Javascript</a></li>
              </ul>
            </li>
            <li class="menu-item"> <a href="#!" class="menu-link">jQueryScript</a> </li>
          </ul>
        </li>
        <li class="menu-item"> <a href="#!" class="menu-link">Blog</a> </li>
        <li class="menu-item"> <a href="#!" class="menu-link">Contact</a> </li>
        <li class="menu-item"> <a href="#!" class="menu-link">About</a> </li>
      </ul>
    </div>
  </div>
</nav>

<!--googleのCDN（ネットワーク経由でコンテンツを提供するサービス）よりjqueryをロード-->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!--外部化したjsファイル-->
<script src="js/Responsive Fixed Off-canvas Menu.js"></script>
</body>
</html>

ファイル1式をサーバーにアップロードして設置完了。