Pen Settings



CSS Base

Vendor Prefixing

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.

+ add another resource


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


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.


Auto Save

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.


                  <h1>Hallo, Wij zijn Codefield!</h1>


                body {
  background-color: #120439;
  height: 100%;
  font-family: 'tradegothiclt-bold', sans-serif;

h1 {
  font-size: 5em;
  color: white;
  text-transform: uppercase;

span {
  border-right: .05em solid;
  animation: caret 1s steps(1) infinite;

@keyframes caret {
  50% {
    border-color: transparent;


  // array with texts to type in typewriter
  var dataText = [ "Utrecht.", "Full Service.", "Webdevelopment.", "Wij zijn Codefield!"];
  // type one text in the typwriter
  // keeps calling itself until the text is finished
  function typeWriter(text, i, fnCallback) {
    // chekc if text isn't finished yet
    if (i < (text.length)) {
      // add next character to h1
     document.querySelector("h1").innerHTML = text.substring(0, i+1) +'<span aria-hidden="true"></span>';

      // wait for a while and call this function again for next character
      setTimeout(function() {
        typeWriter(text, i + 1, fnCallback)
      }, 100);
    // text finished, call callback if there is a callback function
    else if (typeof fnCallback == 'function') {
      // call callback after timeout
      setTimeout(fnCallback, 700);
  // start a typewriter animation for a text in the dataText array
   function StartTextAnimation(i) {
     if (typeof dataText[i] == 'undefined'){
        setTimeout(function() {
        }, 20000);
     // check if dataText[i] exists
    if (i < dataText[i].length) {
      // text exists! start typewriter animation
     typeWriter(dataText[i], 0, function(){
       // after callback (and whole text has been animated), start next text
       StartTextAnimation(i + 1);
  // start the text animation