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


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.


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.


                <h1>JavaScript - exemple de manipulation du DOM</h1>

<p id="p1">Premier paragraphe.</p>
<p id="p2">Deuxième paragraphe.</p>
<p id="p3">Troisième paragraphe</p>
<p>Quatrième paragraphe.</p>
<div>Je ne suis pas un paragraphe!</div>




                window.onload = function() {
  //1. On remplace le texte du premier paragraphe
  var p1 = document.getElementById("p1");
  p1.innerHTML = "Le texte du premier paragraphe a été modifié par JavaScript";

  //2. On ajoute une image au deuxième paragraphe
  var p2 = document.getElementById("p2");
  var image = document.createElement("img");
  image.src = "";

  //3. On supprime le troisième paragraphe
  var p3 = document.getElementById("p3");

  //4. On change la couleur du texte des paragraphes
  var pp = document.getElementsByTagName("p");
  for (var i = 0; i < pp.length; i++) {
    document.getElementsByTagName("p")[i].style.color = "#F00";