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HTML

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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.

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CSS

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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-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.

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Babel is required to process package imports. If you need a different preprocessor remove all packages first.

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You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

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HTML 

              
                <html>

<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
	<script defer src="https://use.fontawesome.com/releases/v5.0.8/js/all.js" integrity="sha384-SlE991lGASHoBfWbelyBPLsUlwY1GwNDJo3jSJO04KZ33K2bwfV9YBauFfnzvynJ" crossorigin="anonymous"></script>
 
  
  <title>Martín Comito - Home</title>
</head>

<body>
  <!--  NAVBAR  -->
    <nav class="navbar navbar-expand-lg sticky-top navbar-dark bg-dark">
      <a class="navbar-brand" href="#">Martín Comito</a>
      <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
      </button>

      <div class="collapse navbar-collapse" id="navbarSupportedContent">
        <ul class="navbar-nav mr-auto">
          <li class="nav-item active">
            <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="#aboutme">About me</a>
          </li>

          <li class="nav-item">
            <a class="nav-link" href="#portfolio">Portfolio</a>
          </li>
          
          <li class="nav-item">
            <a class="nav-link" href="#contact">Contact me</a>
          </li>          
        </ul>
      </div>
    </nav>
  <!--  NAVBAR  -->
  
  <header>
    
	</header>
	
	<section>
	  <div class="container-fluid seccion" id="aboutme">
      <div class="row">
        <div class="col-md aboutme-div text-center my-5 px-5">
          A ver
        </div>
      
        
        
      </div>
	</section>
  
	<section>
	  <div class="container-fluid seccion" id="portfolio">
      Portfolio
    </div>		
	</section>
  
	<section>
	  <div class="container-fluid seccion" id="contact">
      Contact me
    </div>		
	</section>

	<footer>
		<p>Copyright 2018 Martín Comito</p>
	</footer>

</body>

</html>
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CSS 

              
                body {
  background-color: green;
}

.seccion {
  background-color: grey;
  height: 500px;
  border: 1px solid black;
  margin-bottom: 10px;
  margin-top: 10px;
}

footer {
  text-align: center;
}

.aboutme-div {
  background-color: yellow;
  
}
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JS 

              
                $(document).ready(() => {
  // set up scrollspy - only needed on codepen because they add the <body> tag for you
  $("body").attr({
    "data-spy": "scroll",
    "data-target": ".navbar",
    "data-offset": "80"
  });

  //Ajusta la posición del scroll cuando estás navegando para guardar links desde otra página
  const scrollAdjust = () => scrollBy(0, -60);
  if (location.hash) scrollAdjust();
  window.addEventListener("hashchange", scrollAdjust);

  // Scroll suave
  $("a.navbar-brand, .navbar-nav li a:not(.dropdown-toggle)").on("click", e => {
    $(".collapse").collapse("hide"); // close mobile menu on click
    $("html, body")
      .stop()
      .animate(
        {
          scrollTop: $($(e.currentTarget).attr("href")).offset().top - 60
        },
        1250,
        "easeInOutExpo"
      );
  });
});
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999px

Console