Pen Settings

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

⚠️ This feature can only be used by logged in users.

Code Indentation


Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              <div class="container">
 <body class="bg-success"> 
<div class="text-center">
  <h1><strong>Jonas Salk</strong></h1>
<h3><em>Saving the World from Polio</em><h3>
  <div class="bg-primary">
  <a title="By SAS Scandinavian Airlines (Commons: file) [Public domain], via Wikimedia Commons" href="" target="blank"><img alt="Jonas Salk candid" src="" class="text-center img-responsive img-thumbnail"/></a>
  <h3 class="text-center bg-primary text-white"><strong>Timeline of Jonas Salk's Life</strong></h3>
  <div class="col-xs-12 col-sm-19 col-offset-sm-1 col-md-8 col-md-offset-0">
  <ul class="text-white bg-info">
    <li><strong>1914</strong> - Born October 28</li>
    <li><strong>1934</strong> - Graduated from CCNY with Bachelor of Science in Chemistry</li>
    <li><strong>1935</strong> - Began medical school at NYU. During medical school Salk decided he wanted to work as a scientist rather than as a medical doctor following graduation. He took a year off to study biochemistry. He later switched to focus on bacteriology.</li>
    <li><strong>1939</strong> - Marries Donna Lindsay, a master's candidate at NY College of Social Work, the day after graduating medical school.</li>
    <li><strong>1941</strong> - Following graduation from medical school, Salk spent two months working in the lab of Thomas Francis at the University of Michigan. It was this experience that inspired him to focus on virology. Salk later completed his residency at Mount Sinai Hospital where he worked in Francis' lab.</li>
    <li><strong>1947</strong> - Salk began working at the University of Pittsburgh. He established a small lab.</li>
    <li><strong>1948</strong> - Salk expanded the lab with grants from the Mellon Foundation and the Center for Infantile Paralysis. He also brought on new virology researchers.</li>
    <li><strong>1952</strong> - July 2 - Following successful animal tests, Salk injected 43 children with his killed-virus polio vaccine.</li>
    <li><strong>1954</strong> - Salk tested the vaccine on a million children. They became known as the <em>polio pioneers</em>.</li>
    <li><strong>1955</strong> - April 12 - The vaccine is announced as safe. Salk chose not to patent the medicine, instead making it available for the world.</li>
    <li><strong>1963</strong> - Establishes the Salk Institute for Biological Studies in La Jolla, CA</li>
    <li><strong>1968</strong> - Divorces Donna Lindsay.</li>
    <li><strong>1970</strong> - Marries French painter, Françoise Gilot.</li>
    <li><strong>1980s</strong> - Begins research on a vaccine for AIDS.</li>
    <li><strong>1985</strong> - Released immune therapy drug for AIDS called Remune.</li>
    <li><strong>1995</strong> - Died from heart failure at 80.</li>
    <a href="" target=blank>
    <blockquote class="blockquote-quote text-white bg-light">
        <p class="text-muted lead text-right">"Because of Doctor Jonas E. Salk, our country is free from the cruel epidemics of poliomyelitis that once struck almost yearly. Because of his tireless work, untold hundreds of thousands who might have been crippled are sound in body today. These are Doctor Salk's true honors, and there is no way to add to them. This Medal of Freedom can only express our gratitude, and our deepest thanks."</p>
      <p class="text-muted text-right"><em>- President Jimmy Carter</em></p>
    <a href="" target=blank class=text-dark><em>Find out more about Jonas Salk here</em></a>
              img {
display: block;
margin: auto;

🕑 One or more of the npm packages you are using needs to be built. You're the first person to ever need it! We're building it right now and your preview will start updating again when it's ready.