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HTML

About HTML Preprocessors

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

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

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

The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.

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-.

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

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

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About External Resources

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

You can also link to another Pen here (use the .css URL Extension) and we'll pull the CSS from that Pen and include it. If it's using a matching preprocessor, use the appropriate URL Extension and we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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JavaScript

About JavaScript Preprocessors

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

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Babel includes JSX processing.

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.

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About External Resources

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.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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About Packages

Using packages here is powered by esm.sh, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ESM usage.

All packages are different, so refer to their docs for how they work.

If you're using React / ReactDOM, make sure to turn on Babel for the JSX processing.

Behavior

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Format on Save

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Editor Settings

Code Indentation

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Visit your global Editor Settings.

HTML 

              
                <script src="https://cdn.freecodecamp.org/testable-projects-fcc/v1/bundle.js"></script>

<!-- This is a revamp of my original Tribute page built under my CoderK3v codepen account. I also added a comment there to prove the link.
-->

<body>
  
  <div id="main">
  <h1 id="title">Sir Tim Berners-Lee</h1>
  
  <h2>Inventor of the World Wide Web, the 1st web browser, & the worlds 1st web server.</h2>
  </div>
  <br>
  <div id="img-div">
   <img id="image" src="https://upload.wikimedia.org/wikipedia/commons/thumb/7/7a/Timbernerslee.jpg/220px-Timbernerslee.jpg" alt="Sir Tim Berners-Lee">
    <figcaption id="img-caption">
      Sir Tim Berners-Lee standing next to "Code a Better Country" poster
    </figcaption>
  </div>
  
  <div id="tribute-info">
    <ul>
  
  <li>Technically he was the first Front-End Web Developer when he combined hypertext with the internet and created the first web browser called WorldWideWeb that had a built in editor and ran on the NeXTSTEP operating system that he used to create the first web server back in 1989.</li><br>
      
      <li>He is credited with the innovation that continues to change billions of lives and how we interact and share information worldwide!</li><br>
  
  <li>The most respectable thing in my opinion is that he did it all with out trying to patent or trademark any of it with the intent of it being freely available to the world making it easily adoptable by anyone. He has also received several awards for his achievements and founded the W3C that helps create the standards and recommendations to improve the quality of the web.</li><br>
      
      <li>He was even knighted by the Queen in 2004 for his innovative work. </li></ul></div>
  
  <p>For a more in-depth look checkout <a id="tribute-link" href="https://en.wikipedia.org/wiki/Tim_Berners-Lee" target="_blank">Tim Berners-Lee@Wikipedia.com</a></p>
    
</body>
!

CSS 

              
                body {
  text-align: center;
  background-color: hsl(0, 0%, 100%);
  color: black;
  margin: 50px;
}

#main {
  background-color: hsl(0, 0%, 90%);
  max-width: 60%;
  margin: auto;
  padding: 10px;
}

h1 {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
  height: auto;
  margin: auto;
  border-color: black;
  border-width: 5px;
  border-style: solid;
}

#tribute-info {
  font-size: 1.3em;
  text-align: left;
  max-width: 50%;
  height: auto;
  margin: 30px auto auto auto;
}
!

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