Pen Settings

HTML

CSS

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. You can use the CSS from another Pen by using it's URL and the proper URL extention.

+ add another resource

JavaScript

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.

+ add another resource

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.

Behavior

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.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <!-- This script tag would usually go inside the <head> tag, above all other JavaScrip <script> tags, but the limitations of Codepen prevent me from doing this. -->
<script>
  window.gdpr = {
    "addTag": function(tag,attr,content) {
      var newTag = document.createElement(tag);
      for (var prop in attr) {
        if (!attr.hasOwnProperty(prop)) continue;
        newTag.setAttribute(prop,attr[prop]);
      }
      if (content) newTag.innerHTML = content;
      var scripts = document.getElementsByTagName("script");
      var here = scripts[scripts.length - 1];
      here.parentElement.insertBefore(newTag, here.nextSibling);
    }
  };
  var gdprChoice = document.cookie.match(new RegExp('(^| )gdpr=([^;]+)'));
  window.gdpr.choice = gdprChoice ? (gdprChoice[0].split('=')[1] == 'true') : null;
</script>

<p>
  <button type="button" data-js="cookie-config">Change my cookie preferences</button>
  <button type="button" onclick="document.cookie='gdpr=;expires=Fri, 01 Jan 2000 00:00:00 UTC;path=/'">Clear GDPR cookie</button>
  <button type="button" data-js="show-cookie">Show current GDPR cookie</button>
  <output></output>
</p>

<!-- Google Tag Manager -->
<script>
  if (window.gdpr.choice) {
    (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
      new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
    })(window,document,'script','dataLayer','GTM-XXXXXXX');
  }
</script>
<!-- End Google Tag Manager -->

<!-- jQuery -->
<!-- jQuery doesn't set cookies, but this is more an example of how to pass attributes to a script
tag using the arguments object. -->
<script>
  if (window.gdpr.choice) {
    window.gdpr.addTag('script',{
      'src': 'https://code.jquery.com/jquery-3.5.1.min.js',
      'integrity': 'sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0=',
      'crossorigin': 'anonymous'
    });
  }
</script>

<!-- YouTube -->
<!-- Note that it's possible to add YouTube videos in "privacy-enhanced mode", which should not require this logic -->
<script>
  if (window.gdpr.choice) {
    window.gdpr.addTag('iframe',{
      'width': '560',
      'height': '315',
      'src': 'https://www.youtube.com/embed/gsQQgfRay88',
      'frameborder': 0,
      'allow': 'accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture',
      'allowfullscreen': true
    });
  } else {
    window.gdpr.addTag('p','','Please enable cookies to see this YouTube video');
  }
</script>

<!-- Soundcloud -->
<script>
  if (window.gdpr.choice) {
    window.gdpr.addTag('div',{
      'style': 'font-size: 10px; color: #cccccc;line-break: anywhere;word-break: normal;overflow: hidden;white-space: nowrap;text-overflow: ellipsis; font-family: Interstate,Lucida Grande,Lucida Sans Unicode,Lucida Sans,Garuda,Verdana,Tahoma,sans-serif;font-weight: 100;'
    },'<a href="https://soundcloud.com/garyvee" title="garyvee" target="_blank" style="color: #cccccc; text-decoration: none;">garyvee</a> · <a href="https://soundcloud.com/garyvee/gdpr-social-media-technology" title="GDPR, Social Media &amp; Technology - Impact on Society | A Fireside Chat: Drinking and Thinking With GaryVee at VM London" target="_blank" style="color: #cccccc; text-decoration: none;">GDPR, Social Media &amp; Technology - Impact on Society | A Fireside Chat: Drinking and Thinking With GaryVee at VM London</a>');
    window.gdpr.addTag('iframe',{
      'width': '100%',
      'height': '300',
      'scrolling': 'no',
      'allow': 'autoplay',
      'src': 'https://w.soundcloud.com/player/?url=https%3A//api.soundcloud.com/tracks/465022536&color=%23ff5500&auto_play=false&hide_related=false&show_comments=true&show_user=true&show_reposts=false&show_teaser=true&visual=true'
    });
  } else {
    window.gdpr.addTag('p','','Please enable cookies to hear this podcast');
  }
</script>

<!-- Multiple pieces of content -->
<!-- Note that the order of the content is reversed, as each is added directly
 after the current <script> tag, but one after the other. -->
<script>
  if (window.gdpr.choice) {
    window.gdpr.addTag('img',{
      'src': 'https://placeimg.com/560/315/any',
      'width': 560,
      'height': 315,
      'alt': 'Placeholder image',
      'title': 'Title text'
    });
    window.gdpr.addTag('h1','','Content hidden from cookie rejectors');
  } else {
    window.gdpr.addTag('p','','Please enable cookies to see this content');
  }
</script>

              
            
!

CSS

              
                body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  max-width: 60em;
  margin: 0 auto;
  padding: 1em;
}

// The banner which lets the user choose how they want to deal with cookies
[data-js="cookie-choice"] {
  background: #eee;
  bottom: 0;
  left: 0;
  opacity: 1;
  right: 0;
  transition: opacity .2s;
  position: fixed;
}

// Toggle class
.hide {
  opacity: 0;
}

// For demo purposes
output {
  border: dashed 2px #ccc;
  display: block;
  margin: 1em 0;
  padding: .5em;
}
              
            
!

JS

              
                // Has the setup already run?
if (typeof window.gdpr.choice === 'undefined') {
  // Adds (or updates) a global variable with the current state of the GDPR acceptance
  // (this code should also appear in the <head>, so it runs before the script tags appear
  // on the page)
  const gdprChoice = document.cookie.match(new RegExp('(^| )gdpr=([^;]+)'));
  window.gdpr.choice = gdprChoice ? (gdprChoice[0].split('=')[1] == 'true') : null;
}

// Adds the cookie control markup to the page
let cookieChoice = document.createElement('fieldset');
cookieChoice.setAttribute('data-js', 'cookie-choice');
// The cookie control always needs to be in the DOM, so the user can change their mind later
if (window.gdpr.choice !== null) {
  cookieChoice.classList.add('hide');
}
cookieChoice.innerHTML = '<legend>Please accept our cookies</legend><p><button type="button" data-js="gdpr-no">No, I don\'t think so</button> <button type="button" data-js="gdpr-yes">Oh, OK then</button></p>';
document.body.appendChild(cookieChoice);

cookieChoice.addEventListener('click', this.cookieDecision, false);

// Button so the user can change their mind (sometimes more than one appears on the page)
const btnConfig = document.querySelectorAll('[data-js="cookie-config"]');
for (var i = 0; i < btnConfig.length; i++) {
  btnConfig[i].addEventListener('click', function () {cookieChoice.classList.remove('hide')}, false);
}

// The user has interacted with the cookie control panel in some way
function cookieDecision(e) {
  const cookieChoice = document.querySelector('[data-js="cookie-choice"]');
  const btnType = e.target.getAttribute('data-js');
  // "No, I don't think so"
  if (btnType === 'gdpr-no') {
    cookieChoice.classList.add('hide');
    updateCookie(false);
    window.gdpr = false;
  }
  // "Oh, OK then"
  else if (btnType === 'gdpr-yes') {
    cookieChoice.classList.add('hide');
    updateCookie(true);
    window.gdpr = true;
  }
}

function updateCookie(yesOrNo) {
  let myDate = new Date;
  // This selects a date one year in the future, short by a couple of days
  // dev.to/rossangus/a-horrible-coincidence-3fbj
  myDate.setTime(myDate.getTime()+Math.pow(9,11));
  document.cookie = "gdpr=" + yesOrNo + ";expires=" + myDate.toGMTString() + ";SameSite=None;Secure;path=/";
}

// This is not core functionality, but is used to display the current GDPR cookie, for testing purposes
const btnShowCookie = document.querySelector('[data-js="show-cookie"]');
let cookieOutput = document.querySelector('output');

if (btnShowCookie && cookieOutput) {
  btnShowCookie.addEventListener('click', function () {
    let currentCookie = document.cookie.match(new RegExp('(^| )gdpr=([^;]+)'));
    if (currentCookie) {
       cookieOutput.innerHTML = currentCookie[0];
    } else {
      cookieOutput.innerHTML = 'null';
    }
  }, false);
}

              
            
!
999px

Console