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HTML

              
                <main>
<section id="home">
<h2>CLI - Command Line Interface Simulation</h2>
<p>A fun experiment for displaying simple info in a geeky manner.</p>
<p><span>Type 'help' + <kbd>Enter</kbd> -- for available commands.</span></p>
</section>

<section id="about">
<h2><span>&raquo;About</span></h2>
<p>This is an experiment built by <a href="http://syndicatefx.com" target="_blank">Paulo Nunes</a> for showcasing a user profile or cv in an unusual but original way by simulating a command line interface. It's nothing more than the usual hidden elements triggered by some JS to show/hide each section of content, based on input values.</p>
</section>

<section id="usage">
<h2><span>&raquo;Usage</span></h2>
<p>Using it is pretty straight forward. Create several(as much as you need) divs or &laquo;section&raquo; elements each with it's unique id to hold your content. Make sure to have an error section (id="error") with some information to warn the user when he/she mistypes a command or if there is no section with that name, think of it as a 404 page.</p>
<p>A section with id="help" is also required so you can list all the available sections and let your users know what words to write to access that particular content.</p>
<p>The input field must be a standalone element and must not be placed inside any of the content divs or sections, and make sure you give it a classname "command", if you want to name it anything else you need to edit the app.js and change all instances of .command in the script to match your chosen classname.</p>
<p>In short, just view the source code of this demo, copy/modify it to your liking making sure you include the error and help sections.</p>
</section>

<section id="download">
<h2><span>&raquo;Download</span></h2>
<p>Download/fork the source code: <a href="https://github.com/syndicatefx/cli">Github</a></br>
License: MIT</p>
</section>

<section id="error">
<p>Command not found!<p> 
<p><span>Type 'help' + <kbd>Enter</kbd> -- for available commands.</span></p>
</section>

<section id="help">
<h2><span>&raquo;Help?</span></h2>
<p><span>Type [command] + <kbd>Enter</kbd></span></p>
<ul>
	<li>'home' -- Thats obvious!</li>
	<li>'about' -- What's this for</li>
  <li>'usage' -- How to</li>
  <li>'download' -- Download + license</li>
	<li>'help' -- displays this list</li>
</ul>
</section>

<span class="command">syndicatefx:/$<input type="text"></span>
</main>
              
            
!

CSS

              
                @import url(https://fonts.googleapis.com/css?family=Inconsolata:400,700);
html {
  background: #fff;
  overflow-y: scroll; 
}

body {
  font: .875em/1.6 'Inconsolata', monospace;
  color: #181818;
  font-weight: 400;
  max-width: 28em;
  padding: 1em;
  margin: 5% 0; 
}
::selection{
  background: #eee
}
::-webkit-selection{
  background: #eee
}
::-moz-selection{
  background: #eee
}
a{
  color: #181818;
}
a:hover,a:focus{
  background: #181818;
  color:#fff;
}
h2{
  font-size: 1em;
  font-weight: 400;
}
p{
  margin-bottom:2em;
}
abbr{
  cursor: help;
}
ul{
  list-style: none;
  padding: 0;
}
li{
  margin:1em 0 0;
}
span{
  display: block;
  color:#999;
  line-height:1;
}

kbd{
  font-family: 'Inconsolata', monospace;
  border:1px solid #999;
  text-transform: uppercase;
  padding:0 .2em;
}
input[type="text"]{
  max-width: 10em;
  border: none;
  font-family: inherit;
  background: #fff;
  padding:0 .5em;
}
input[type="text"]:focus{
  background: #fff;
  color: #000;
  outline:none;
}
.command{
  display: none;
  max-width: 20em;
  color: #181818;
  font-weight: 700;
  margin: 2em 0;
}


section{
  display: none;
}
.open{
  display: block;
}

              
            
!

JS

              
                /*!
 * CLI
 * Simulating a command line interface with vanilla JS
 *
 * @version : 1.2.0
 * @author : Paulo Nunes (http://syndicatefx.com)
 * @demo : https://codepen.io/syndicatefx/pen/jPxXpz
 * @license: MIT
 */

/*
Modified/adapted from the original script by:
https://github.com/ckm100/typeWriter.js
*/
document.addEventListener("DOMContentLoad", typeWriter, false);

var typeWriter = function (selector, type, interval) {

    var el = document.querySelectorAll(selector), // Getting elements in the DOM
        i = 0,
        len = el.length, // Length of element on the page
        list = [], // List of elements on the page in the DOM
        a,
        all,
        text,
        start,
        end,
        nextText,
        sectionId = selector.replace(/^#/, ''),
        targetSection = document.getElementById(sectionId),
        sections = document.getElementsByTagName("section")[0],
        targetSiblings = [].slice.call(sections.parentNode.children).filter(function(v) { return v !== targetSection }),
        cmd = document.querySelector(".command"),
        clear;

    for (; i < len; i++) {

        list.push(el[i]); // Pushing the element in the list array
    }

    for (a in list) {

        all = list[a]; // List of all element
        text = all.innerHTML; // InnerHTML of the elements 
        start = 0; // Start index of the text in the elements 
        end = 0; // End index of the text in the elements


        //Setting the default interval to 100 when interval is not set by the user
        if (typeof interval === "undefined") {

            interval = 100;

        }

        if (arguments[1] === "true") {

        	setTimeout(function() {
        		targetSection.classList.add("open");
        	}, 200);

	       	for(var i = 0;i < targetSiblings.length;i++) {
	        	targetSiblings[i].classList.remove("open");
	        }

            clear = setInterval(function () { // Animation start
                var newText = text.substr(start, end);

                all.innerHTML = newText;

                end = end + 1; //loops through the text in the element

                if (newText === text) {

                    clearInterval(clear); // Animation end
                    cmd.classList.add("open");
                    input.focus();

                }

            }, interval);

        }

        return all;

    }

}

var input = document.querySelector("input"),
	block = document.getElementsByTagName("section");

window.onload = function() {
	typeWriter("#home","true",10);

	var sectionArray = [];
	for(var i = 0;i < block.length;i++) {
		sectionArray.push(block[i].id);
	}
	//console.log(sectionArray);

	input.addEventListener('keyup', function(e) {
		if((e.keyCode || e.which) == 13) {// ENTER key pressed
			var targetValue = input.value;
			var destination = "#" + targetValue;
			typeWriter(destination,"true",10);
			input.value = "";

			if(sectionArray.includes(targetValue) == false) {
				typeWriter("#error","true",10);
			}
		}
	});
};
              
            
!
999px

Console