jquery（hc-offcanvas-nav）点击按钮动画显示出折叠菜单插件

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hc-offcanvas-nav是一款基于jQuery和JavaScript多层次菜单导航插件，点击按钮从网页的上下左右四个方向动画显示出折叠菜单，可设置菜单主题。

使用方法：

1. 创建多级导航菜单

<nav id="main-nav">
  <ul class="first-nav">
    <li class="cryptocurrency">
      <a href="#">Cryptocurrency</a>
      <ul>
        <li><a href="#">Bitcoin</a></li>
        <li><a href="#">Ethereum</a></li>
        <li><a href="#">NEO</a></li>
        <li><a href="#">ZCash</a></li>
        <li><a href="#">Dogecoin</a></li>
      </ul>
    </li>
  </ul>
  <ul class="second-nav">
    <li class="devices">
      <a>Devices</a>
      <ul>
        <li class="mobile">
          <a href="#">Mobile Phones</a>
          <ul>
            <li><a href="#">Super Smart Phone</a></li>
            <li><a href="#">Thin Magic Mobile</a></li>
            <li><a href="#">Performance Crusher</a></li>
            <li><a href="#">Futuristic Experience</a></li>
          </ul>
        </li>
        <li class="television">
          <a href="#">Televisions</a>
          <ul>
            <li><a href="#">Flat Superscreen</a></li>
            <li><a href="#">Gigantic LED</a></li>
            <li><a href="#">Power Eater</a></li>
            <li><a href="#">3D Experience</a></li>
            <li><a href="#">Classic Comfort</a></li>
          </ul>
        </li>
        <li class="camera">
          <a href="#">Cameras</a>
          <ul>
            <li><a href="#">Smart Shot</a></li>
            <li><a href="#">Power Shooter</a></li>
            <li><a href="#">Easy Photo Maker</a></li>
            <li><a href="#">Super Pixel</a></li>
          </ul>
        </li>
      </ul>
    </li>
    <li class="magazines">
      <a href="#">Magazines</a>
      <ul>
        <li><a href="#">National Geographic</a></li>
        <li><a href="#">Scientific American</a></li>
        <li><a href="#">The Spectator</a></li>
        <li><a href="#">The Rambler</a></li>
        <li><a href="#">Physics World</a></li>
        <li><a href="#">The New Scientist</a></li>
      </ul>
    </li>
    <li class="store">
      <a href="#">Store</a>
      <ul>
        <li>
          <a href="#">Clothes</a>
          <ul>
            <li>
              <a href="#">Women's Clothing</a>
              <ul>
                <li><a href="#">Tops</a></li>
                <li><a href="#">Dresses</a></li>
                <li><a href="#">Trousers</a></li>
                <li><a href="#">Shoes</a></li>
                <li><a href="#">Sale</a></li>
              </ul>
            </li>
            <li>
              <a href="#">Men's Clothing</a>
              <ul>
                <li><a href="#">Shirts</a></li>
                <li><a href="#">Trousers</a></li>
                <li><a href="#">Shoes</a></li>
                <li><a href="#">Sale</a></li>
              </ul>
            </li>
          </ul>
        </li>
        <li>
          <a href="#">Jewelry</a>
        </li>
        <li>
          <a href="#">Music</a>
        </li>
        <li>
          <a href="#">Grocery</a>
        </li>
      </ul>
    </li>
    <li class="collections"><a href="#">Collections</a></li>
    <li class="credits"><a href="#">Credits</a></li>
  </ul>
</nav>

2.  在html页面中加载jQuery库的最新版本（可选）和hcoffcanvanav插件的文件。

<link href="Xhc-offcanvas-nav.css" rel="stylesheet" />
<link href="Xhc-offcanvas-nav.css" rel="stylesheet" />
<script src="jquery.min.js"></script>
<script src="Xhc-offcanvas-nav.js"></script>

3. 初始化插件

// as a jQuery plugin
$('#main-nav').hcOffcanvasNav({
  // options here
});
// as a Vanilla JS plugin
var myNav = new hcOffcanvasNav('#main-nav', {
    // options here
});

4. 指定插件隐藏常规导航的屏幕宽度。

$('#main-nav').hcOffcanvasNav({
  disableAt: 1024
});

5. 自定义关闭/返回按钮的文本。

$('#main-nav').hcOffcanvasNav({
  insertClose: true,
  insertBack: true,
  labelClose: 'Close',
  labelBack: 'Back',
  levelTitleAsBack: true
});

6. 切换菜单时，是否网站主题内容推到另一边。 

$('#main-nav').hcOffcanvasNav({
  pushContent: true // default false
});

7. 设置菜单导航打开的方向。 values: 'left' (default), 'right', 'top' and 'bottom' 上下左右四个方向。

$('#main-nav').hcOffcanvasNav({
  position: 'right'
});

8. 配置选项

$('#main-nav').hcOffcanvasNav({
  // width & height
  width: 280,
  height: 'auto',

  // enable swipe gestures
  swipeGestures: true,

  // initialize the menu in expanded mode
  expanded: false

  // overlap / expand / none
  levelOpen: 'overlap', 

  // in pixels
  levelSpacing: 40,

  // shows titles for submenus
  levelTitles: false,

  // close sub levels when the nav closes
  closeOpenLevels: true,

  // clear active levels when the nav closes
  closeActiveLevel: false,

  // the title of the first level
  navTitle: null,

  // extra CSS class(es)
  navClass: '',

  // disable body scroll 
  disableBody: true,

  // close the nav on click
  closeOnClick: true,

  // custom toggle element
  customToggle: null,

  // prepend or append the menu to body
  bodyInsert: 'prepend',

  // should original menus and their items classes be preserved or excluded.
  keepClasses: true,

  // remove original menu from the DOM
  removeOriginalNav: false

  // enable RTL mode
  rtl: false
  
});

9. 属性

1. data-nav-close:设置关闭按钮

2. data-nav-active:设置选中特定菜单

3. data-nav-highlight:设置高亮

<nav id="main-nav">
  <ul>
    <li data-nav-custom-content>
      <div>Some custom content</div>
    </li>
    <li><a href="#">Home</a></li>
    <li>
      <a href="#">About</a>
      <ul data-nav-active>
        <li><a href="#">Team</a></li>
        <li><a href="#">Project</a></li>
        <li><a href="#">Services</a></li>
      </ul>
    </li>
    <li><a href="#">Contact</a></li>
    <li><a data-nav-close="false" href="#">Add Page</a></li>
  </ul>
</nav>

10. aip 方法.

// As a jQuery Plugin
var $nav = $('#main-nav').hcOffcanvasNav();
var Nav = $nav.data('hcOffcanvasNav');

// As a Vanilla JS Plugin
var Nav = new hcOffcanvasNav();

// open the menu
Nav.open();

// open a specific sub-menu
Nav.open(level, index);

// close the menu
Nav.close();

// check if the menu is opened
Nav.isOpen();

// return the current options
Nav.getSettings();

// update options
Nav.update({
  // options
});

// update the nav DOM
Nav.update(true);

// update the options and the DOM
Nav.update({
  // options
}, true);
11. Events.

Nav.on('close', function(event, settings) {
  // on close
});

Nav.on('close.once', function(event, settings) {
  // on close only once
});

Nav.on('close.level', function(event, settings) {
  // when a sub level is closed
});

Nav.on('open', function(event, settings) {
  // on open
});

Nav.on('open.level', function(event, settings) {
  // when a sub level is opened
});

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