MMenu Open on Load with close

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jQuery.mmenu/5.3.1/js/addons/jquery.mmenu.fixedelements.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jQuery.mmenu/5.3.1/js/jquery.mmenu.min.js"></script>
		<div id="page">
			<div class="header Fixed">
				<a href="#menu" class="btn btn-default"></a>
				Demo
        <nav class="navbar navbar-default navbar-fixed-top">
      <div class="container-fluid">
        <div class="navbar-header">
          <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-6" aria-expanded="false">
            <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span>
          </button> <a class="navbar-brand" href="#">Brand</a>
        </div>
        <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-6">
          <ul class="nav navbar-nav">
            <li class="active"><a href="#">Home</a></li>
            <li><a href="#">Link</a></li>
            <li><a href="#">Link</a></li>
          </ul>
        </div>
      </div>
    </nav>
			</div>
			<div class="content" id="content">
				<div id="intro">
					<p><strong>This is a demo.</strong><br />
						Click the menu icon to open the menu.</p>
					
					<p>The links in the menu link to a section on the same page, some small javascript makes the page scroll smoothly.</p>
				</div>
				<div id="first">
					<p><strong>This is the first section.</strong><br />
						Notice how the fixed header and footer slide out along with the page.</p>

					<p><a href="#menu">Open the menu.</a></p>
				</div>
				<div id="second">
					<p><strong>This is the second section.</strong><br />
						You can also drag the page to the right to open the menu.</p>
					<p><a href="#menu">Open the menu.</a></p>
				</div>
				<div id="third">
					<p><strong>This is the third section.</strong><br />
						<a...

CSS

@import url('https://cdnjs.cloudflare.com/ajax/libs/jQuery.mmenu/5.3.1/css/extensions/jquery.mmenu.widescreen.css') screen and (min-width: 900px);
@import url('https://cdnjs.cloudflare.com/ajax/libs/jQuery.mmenu/5.3.1/css/jquery.mmenu.css');
html, body
{
	padding: 0;
	margin: 0;
}
body
{
	background-color: #fff;
	font-family: Arial, Helvetica, Verdana;
	font-size: 14px;
	line-height: 22px;
	color: #666;
	position: relative;
	-webkit-text-size-adjust: none;
}
body *
{
	text-shadow: none;
}
h1, h2, h3, h4, h5, h6
{
	line-height: 1;
	font-weight: bold;
	margin: 20px 0 10px 0;
}
h1, h2, h3
{
	font-size: 18px;
}
h4, h5, h6
{
	font-size: 16px;
}
p
{
	margin: 0 0 10px 0;
}
a, a:link, a:active, a:visited, a:hover
{
	color: inherit;
	text-decoration: underline;
}

nav:not(.mm-menu)
{
	display: none;
}

.header,
.content,
{
	text-align: center;
}
.header
{
	background: #777;
	font-size: 16px;
	font-weight: bold;
	color: #fff;
	line-height: 40px;


	-moz-box-sizing: border-box;
	box-sizing: border-box;	
	width: 100%;
	height: 40px;
	padding: 0 50px;
}
.header.fixed
{
	position: fixed;
	top: 0;
	left: 0;
}

.header a
{
	background: center center no-repeat transparent;
	background-image: url( data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABkAAAAZCAYAAADE6YVjAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAADhJREFUeNpi/P//PwOtARMDHQBdLGFBYtMq3BiHT3DRPU4YR4NrNAmPJuHRJDyahEeT8Ii3BCDAAF0WBj5Er5idAAAAAElFTkSuQmCC );

	display: block;
	width: 40px;
	height: 40px;
	position: absolute;
	top: 0;
	left: 10px;
}
.content
{
	padding: 150px 50px 50px 50px;
}

			#intro,
			#first,
			#second,
			#third
			{
				height: 400px;
			}
			#intro
			{
				padding-top: 0;
			}
			#first,
			#second,
			#third
			{
				border-top: 1px solid #ccc;
				padding-top: 150px;
			}


			.header
			{
				box-sizing: border-box;
				width: 100%;
				position: fixed;
			}
			.header
			{
				top: 0;
			}

JavaScript

$(function() {
				var $menu = $('nav#menu'),
					$html = $('html, body');

				$menu.mmenu({
					extensions: ["widescreen", "theme-dark"]
				});

				var $anchor = false;
				$menu.find( 'li > a' ).on(
					'click',
					function( e )
					{
						$anchor = $(this);
					}
				);

				var api = $menu.data( 'mmenu' );
				api.bind( 'closed',
					function()
					{
						if ( $anchor )
						{
							var href = $anchor.attr( 'href' );
							$anchor = false;

								if the clicked link is linked to an anchor, scroll the page to that anchor 
							if ( href.slice( 0, 1 ) == '#' )
							{
								$html.animate({
									scrollTop: $( href ).offset().top
								});	
							}
						}
					}
				);
			});