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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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Adding Classes

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About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

!
Insecure Resource

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <nav id="navbar">
	<header id="nav-header">Documentation</header>
	<ul>
		<li><a class="nav-link" href="#introduction">Introduction</a></li>
		<li><a class="nav-link" href="#Lorem_ipsum">Lorem ipsum</a></li>
		<li><a class="nav-link" href="#dolor_sit_amet">Dolor sit amet</a></li>
		<li><a class="nav-link" href="#consectetur_adipiscing_elit">Consectetur adipiscing elit</a></li>
		<li><a class="nav-link" href="#sed_do_eiusmod">Sed do eiusmod</a></li>
	</ul>
</nav>
<main id="main-doc">
	<section class="main-section" id="introduction">
		<header>Introduction</header>
		<article>
			<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent arcu metus, tempus id ex vel, ullamcorper lobortis nisi. Curabitur vel vestibulum enim. Nullam imperdiet blandit justo, sed faucibus metus vehicula id. Pellentesque cursus ipsum vel eros ultrices molestie. Maecenas placerat, diam non consequat pretium, mauris sapien finibus odio, lacinia venenatis ipsum quam id ligula. Morbi tempor, metus vitae posuere viverra, urna elit commodo libero, sed dapibus lorem ex eu eros. </p>
			<p>Morbi id nulla sollicitudin, maximus urna nec, interdum augue. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Phasellus euismod, purus in vehicula efficitur, nisi nibh varius nunc, et porta elit ipsum ut sem. Ut auctor, elit et ullamcorper hendrerit, purus eros congue nulla, ac mattis nunc turpis ac urna.</p>
			<code>
				int i=0;
			</code>
		</article>
	</section>
	<section class="main-section" id="Lorem_ipsum">
		<header>Lorem ipsum</header>
		<article>
			<p>Nulla facilisis hendrerit ante, sed dictum tellus interdum tristique. Nam convallis tortor sit amet diam placerat, at feugiat velit elementum. Nulla luctus suscipit urna at posuere. Aliquam lacus turpis, tristique id varius vitae, lacinia ac ligula. Praesent gravida hendrerit fringilla. Sed egestas varius augue non dictum. </p>
			<code>
				int i=1;
			</code>
			<p>Phasellus consectetur lobortis libero, elementum facilisis augue fermentum eget. Etiam diam nunc, maximus nec aliquam ut, tincidunt id lacus. Cras laoreet, dolor in auctor egestas, tortor tellus efficitur nulla, ac faucibus nulla nibh quis nunc. Cras sapien velit, lobortis ac dignissim ut, ultricies vel leo. Etiam hendrerit id sem non pellentesque. Donec egestas tincidunt velit, sit amet sodales massa laoreet vitae.</p>
			</article>
		</section>
		<section class="main-section" id="dolor_sit_amet">
			<header>Dolor sit amet</header>
			<article>
				<p>Pellentesque nec dui nec urna pretium eleifend. Nulla semper, odio quis varius mattis, dolor metus rhoncus ex, eget tempor turpis urna et quam. Cras ultricies metus diam, vel imperdiet mauris tristique eget. Maecenas at nisl pretium, scelerisque justo sed, eleifend arcu. </p> 
				<code>
					int i=2;
				</code>
				<p>Vestibulum ac mi ut neque scelerisque dictum. Vivamus vel tortor imperdiet, feugiat nulla mattis, maximus dui. Curabitur vel ligula vel augue maximus venenatis. Nam vel urna diam. Curabitur in interdum nisi, eu consequat dui. Phasellus eget nisi vel dui tincidunt ultrices. Aenean efficitur risus at diam tincidunt vulputate.</p>
				<code> 
					int i=3;
				</code>
			</article>
		</section>
		<section class="main-section" id="consectetur_adipiscing_elit">
			<header>Consectetur adipiscing elit</header>
			<article>
				<p>Fusce id facilisis lectus, venenatis vulputate turpis. In vitae ex non elit laoreet venenatis. Vestibulum cursus cursus arcu id efficitur. Mauris a lectus lobortis, pretium ex sit amet, sagittis purus. Sed lacinia metus quis dignissim lacinia. Fusce a volutpat magna. Integer ut maximus tellus, sit amet facilisis ligula. </p> 
				<code>
					int i=4;
				</code>
				<p>Cras venenatis et quam eu rhoncus. Mauris pharetra sollicitudin lectus, ut lacinia diam ultricies eget. Duis sit amet dictum justo. Aliquam turpis urna, suscipit ac quam in, blandit mollis risus. Etiam vitae arcu sed purus bibendum consectetur eget id ante.</p>
				</article>
			</section>
			<section class="main-section" id="sed_do_eiusmod">
				<header>Sed do eiusmod</header>
				<article>
					<p>Pellentesque ut maximus odio, faucibus interdum odio. Nulla cursus lacus in porta rutrum. Nunc ultrices placerat odio. Vivamus aliquet massa nunc, vel volutpat enim dictum vel. Ut euismod suscipit elit sed efficitur. Aliquam sit amet ante ac turpis lacinia porttitor. </p>
					<ul>
						<li>Pellentesque ut maximus odio.</li>
						<li>Faucibus interdum odio.</li>
						<li>Nulla cursus lacus in porta rutrum.</li>
						<li>Nunc ultrices placerat odio.</li>
						<li>Ut euismod suscipit elit sed efficitur.</li>
					</ul>
					<p>Quisque ac nisi cursus metus tristique vestibulum sed sed libero. Vivamus a lacus velit. Fusce tincidunt eu metus et tempor. Nullam rhoncus non mauris sit amet vulputate. Pellentesque laoreet sapien sagittis mauris porttitor, vitae egestas nulla consectetur. Sed nec accumsan nisl, vel ornare lacus.</p>
				</article>
	</section>
</main>
!

CSS 

              
                html,
body {
  min-width: 290px;
  color: #4d4e53;
  background-color: #BBDEFB;
  font-family: <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Raleway:400,400i,700">;
  line-height: 1.5;
}


#navbar {
 position: fixed;
  min-width: 290px;
  top: 0px;
  left: 0px;
  width: 300px;
  height: 100%;
  border-right: solid;
  border-color: rgba(0, 22, 22, 0.4);
	border-radius: 10%;
}

#navbar ul {
	height: 88%;
    padding: 0;
  	overflow-y: auto;
  	overflow-x: hidden;
}

#navbar li{
    color: #4d4e53;
  border-top: 1px solid;
  list-style: none;
  position: relative;
  width: 100%;
}

#navbar a {
  display: block;
  padding: 10px 30px;
  color: #4d4e53;
  text-decoration: none;
  cursor: pointer;
	
}


#main-doc{
	position: absolute;
  margin-left: 310px;
  padding: 20px;
  margin-bottom: 110px;
}

header{
	color: black;
  margin: 10px;
  text-align: center;
  font-size: 1.8em;
  font-weight: thin;
}

section article {
  color: #4d4e53;
  margin: 15px;
  font-size: 0.96em;
}

section li {
  margin: 15px 0px 0px 20px;
}

code {
  display: block;
  text-align: left;
  white-space: pre-line;
  position: relative;
  word-break: normal;
  word-wrap: normal;
  line-height: 2;
  background-color: #E0F7FA;
  padding: 15px;
  margin: 10px;
  border-radius: 5px;
}

@media only screen and (max-width: 815px) {
	
#navbar {
 background-color: white;
    position: absolute;
    top: 0;
    padding: 0;
    margin: 0;
    width: 100%;
    max-height: 275px;
    border: none;
    z-index: 1;
    border-bottom: 2px solid;
}

	
	#navbar ul {
    border: 1px solid;
    height: 207px;
  }
	
	#main-doc {
    position: relative;
    margin-left: 0px;
    margin-top: 0px;
  }	
}

@media only screen and (max-width: 400px) {
  #main-doc {
    margin-left: -10px;
  }

  code {
    margin-left: -20px;
    width: 100%;
    padding: 15px;
    padding-left: 10px;
    padding-right: 45px;
    min-width: 233px;
  }
}
!

JS 

              
                // !! IMPORTANT README:

// You may add additional external JS and CSS as needed to complete the project, however the current external resource MUST remain in place for the tests to work. BABEL must also be left in place. 

/***********
INSTRUCTIONS:
  - Select the project you would 
    like to complete from the dropdown 
    menu.
  - Click the "RUN TESTS" button to
    run the tests against the blank 
    pen.
  - Click the "TESTS" button to see 
    the individual test cases. 
    (should all be failing at first)
  - Start coding! As you fulfill each
    test case, you will see them go   
    from red to green.
  - As you start to build out your 
    project, when tests are failing, 
    you should get helpful errors 
    along the way!
    ************/

// PLEASE NOTE: Adding global style rules using the * selector, or by adding rules to body {..} or html {..}, or to all elements within body or html, i.e. h1 {..}, has the potential to pollute the test suite's CSS. Try adding: * { color: red }, for a quick example!

// Once you have read the above messages, you can delete all comments.
!
999px

Console