cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

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.

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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


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Auto-Updating Preview

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

              <pre><output>webpack: Compiled successfully.
webpack: Compiling...
Hash: 33d8c38093d5e8261eac
Version: webpack 3.11.0
Time: 1337ms
                               Asset       Size  Chunks                    Chunk Names
                          project.js    12.3 MB       0  [emitted]  [big]  project
                        dashboard.js    6.36 MB       1  [emitted]  [big]  dashboard
                         organize.js    5.29 MB       2  [emitted]  [big]  organize
                          proPens.js    4.92 MB       3  [emitted]  [big]  proPens
0.81c79b4db476a98d272f.hot-update.js    87.4 kB       0  [emitted]         project
1.81c79b4db476a98d272f.hot-update.js    7.94 kB       1  [emitted]         dashboard
81c79b4db476a98d272f.hot-update.json   52 bytes          [emitted]
                       manifest.json  272 bytes          [emitted]
[./app/javascript/common/components/Overlay.js] ./app/javascript/common/components/Overlay.js 2.42 kB {0} {1} [built]</output></pre>
              body {
  background-color: black;
  background-image: radial-gradient(
    rgba(0, 150, 0, 0.75), black 120%
  height: 100vh;
  margin: 0;
  overflow: hidden;
  padding: 2rem;
  color: white;
  font: 1.3rem Inconsolata, monospace;
  text-shadow: 0 0 5px #C8C8C8;
  &::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: repeating-linear-gradient(
      rgba(black, 0.15),
      rgba(black, 0.15) 1px,
      transparent 1px,
      transparent 2px
    pointer-events: none;
::selection {
  background: #0080FF;
  text-shadow: none;
pre {
  margin: 0;
🕑 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.
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