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CSS

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                	<input type="checkbox" id="show-menu" role="button">

	<ul id="menu">
		<li><a href="#about">About Me</a></li>
		<li><a href="#portfolio">Portfolio</a></li>
		<li><a href="#blog">Blog</a></li>
	</ul>

	<div id="wrapper">

		<header>
      
        <!-- clicking this label will check and uncheck the checkbox -->
			<label for="show-menu">Menu</label>

			<h1>Mobile Push Menu With CSS</h1>
			<p>Click on the word Menu above to open or close the menu.</p>
      
        <p>This pure CSS push-down menu is simple to code but it has its limits. The menu doesn't close when you click a link. Part of the problem is that a checkbox has only two states, checked and unchecked. Also these states can only be toggled by clicking on the checkbox or (one of) its label(s).</p>
		</header>

		<section id="about">
			<h2>About Me</h2>
			
		</section>

		<section id="portfolio">
			<h2>Portfolio</h2>
			
		</section>

		<section id="blog">
			<h2>Blog</h2>
			
		</section>

	</div>
!

CSS 

              
                
/* Hide Checkbox */
#show-menu {
	display: none;
}

/* Put menu above canvas and set up transition */
#menu {
	position: absolute;
	top: -5em;

	-webkit-transition: top .3s ease-in;
	transition: top .3s ease-in;

}

/* Place menu at top */
#wrapper {
	position: relative;
	top: 0;

	-webkit-transition: top .3s ease-in;
	transition: top .3s ease-in;
}


/* change position of both when checkbox is clicked */
#show-menu:checked ~ #wrapper {
	top: 5em;
}
#show-menu:checked ~ #menu {
	top: 0;
}





/* Unnecessary styling stuff */
#menu {
  background-color: #FAD89B;
  width: calc(100% - 56px);
}
header, section {
	height: 500px;
}
header {
	background-color: #B598A2;
}
#about {
	background-color: #73799E;
}
#portfolio {
	background-color: #809E90;
}
#blog {
	background-color: #BCBD9C;
}
!

JS
!
999px

Console