Pen Settings



CSS Base

Vendor Prefixing

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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.

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

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Code Indentation

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                <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    87.4 kB       0  [emitted]         project    7.94 kB       1  [emitted]         dashboard   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;