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HTML

About HTML Preprocessors

HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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Adding Classes

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

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Insecure Resource

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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.

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About External Resources

You can apply CSS to your Pen from any stylesheet on the web. Just put a URL to it here and we'll apply it, in the order you have them, before the CSS in the Pen itself.

You can also link to another Pen here (use the .css URL Extension) and we'll pull the CSS from that Pen and include it. If it's using a matching preprocessor, use the appropriate URL Extension and we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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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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About External Resources

You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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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.

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About Packages

Using packages here is powered by esm.sh, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ESM usage.

All packages are different, so refer to their docs for how they work.

If you're using React / ReactDOM, make sure to turn on Babel for the JSX processing.

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HTML 

              
                <div class="p-24 bg-purple-900 flex flex-col justify-center items-center">
   <!-- title -->
   <h2 class="pb-10 font-bold text-6xl text-purple-200 text-center">Buttons with Tailwind CSS</h2>
</div>

<div class="p-24 bg-purple-300 flex flex-col justify-center items-center">
   <h3 class="pb-10 font-bold text-4xl text-purple-700">Button Tags</h3>

   <!-- button tags; info button bootstrap color teal is swapped out for simplicity; extra step will be added for color customizations -->
   <div class="flex space-x-2 space-y-2 flex-wrap justify-center items-baseline">
      <button class="rounded-lg px-4 py-2 bg-blue-500 text-blue-100 hover:bg-blue-600 duration-300">Primary</button>
      <button class="rounded-lg px-4 py-2 bg-gray-600 text-gray-100 hover:bg-gray-700 duration-300">Secondary</button>
      <button class="rounded-lg px-4 py-2 bg-green-700 text-green-100 hover:bg-green-800 duration-300">Success</button>
      <button class="rounded-lg px-4 py-2 bg-red-600 text-red-100 hover:bg-red-700 duration-300">Danger</button>
      <button class="rounded-lg px-4 py-2 bg-yellow-500 hover:bg-yellow-600 duration-300">Warning</button>
      <button class="rounded-lg px-4 py-2 bg-green-300 hover:bg-green-400 duration-300">Info</button>
      <button class="rounded-lg px-4 py-2 bg-gray-200 hover:bg-gray-300 duration-300">Light</button>
      <button class="rounded-lg px-4 py-2 bg-gray-900 text-gray-100">Dark</button>
      <button class="rounded-lg px-4 py-2 underline text-blue-500 hover:text-blue-600 duration-300">Link</button>
   </div>
</div>

<div class="p-24 bg-purple-50 flex flex-col justify-center items-center">
   <h3 class="pb-10 font-bold text-4xl text-purple-700">Outline Buttons</h3>

   <!-- outline buttons; info button bootstrap color teal is swapped out for simplicity; extra step will be added for color customizations -->
   <div class="flex space-x-2 space-y-2 flex-wrap justify-center items-baseline">
      <button class="rounded-lg px-4 py-2 border-2 border-blue-500 text-blue-500 hover:bg-blue-600 hover:text-blue-100 duration-300">Primary</button>
      <button class="rounded-lg px-4 py-2 border-2 border-gray-600 text-gray-600 hover:bg-gray-600 hover:text-gray-100 duration-300">Secondary</button>
      <button class="rounded-lg px-4 py-2 border-2 border-green-700 text-green-700 hover:bg-green-700 hover:text-green-100 duration-300">Success</button>
      <button class="rounded-lg px-4 py-2 border-2 border-red-600 text-red-600 hover:bg-red-600 hover:text-red-100 duration-300">Danger</button>
      <button class="rounded-lg px-4 py-2 border-2 border-yellow-500 text-yellow-500 hover:bg-yellow-500 hover:text-yellow-100 duration-300">Warning</button>
      <button class="rounded-lg px-4 py-2 border-2 border-green-300 text-green-300 hover:bg-green-300 hover:text-green-100 duration-300">Info</button>
      <button class="rounded-lg px-4 py-2 border-2 border-gray-200 text-gray-200 hover:bg-gray-200 hover:text-gray-900 duration-300">Light</button>
      <button class="rounded-lg px-4 py-2 border-2 border-gray-900 text-gray-900 hover:bg-gray-900 hover:text-gray-100 duration-300">Dark</button>
      <button class="rounded-lg px-4 py-2 underline text-blue-500 ">Link</button>
   </div>
</div>

<div class="p-24 bg-purple-200 flex flex-col justify-center items-center">
   <h3 class="pb-10 font-bold text-4xl text-purple-700">Button Sizes</h3>

   <!-- button sizes -->
   <div class="flex flex-wrap justify-center items-baseline">

      <!-- large button -->
      <div class="px-5">
         <h3 class="font-bold pb-2 text-center">Large Button</h3>
         <button class="rounded-lg px-8 py-2 text-xl bg-blue-500 text-blue-100 hover:bg-blue-600 duration-300">Large</button>
         <button class="rounded-lg px-8 py-2 text-xl border-2 border-blue-500 text-blue-500 hover:bg-blue-500 hover:text-blue-100 duration-300">Large</button>
      </div>

      <!-- small button -->
      <div class="px-5">
         <h3 class="font-bold pt-4 pb-2 text-center">Small Button</h3>
         <button class="rounded px-4 py-2 text-xs bg-blue-500 text-blue-100 hover:bg-blue-600 duration-300">Small</button>
         <button class="rounded px-4 py-2 text-xs border-2 border-blue-500 text-blue-500 hover:bg-blue-500 hover:text-blue-100 duration-300">Small</button>
      </div>

   </div>
</div>

<div class="p-24 bg-purple-700 flex flex-col justify-center items-center">
   <h3 class="pb-10 font-bold text-4xl text-purple-100">Block Buttons with Grids</h3>

   <!-- buttons with grid -->
   <div class="w-full grid grid-col-12 gap-y-5 gap-x-2">

      <!-- full width -->
      <p class="col-span-12 font-bold text-purple-300">Full width</p>
      <button class="col-span-12 rounded-lg px-4 py-2 bg-green-700 text-green-100 hover:bg-green-800 duration-300">Submit</button>

      <!-- half width -->
      <p class="col-span-12 font-bold text-purple-300">Half width</p>
      <button class="col-span-6 rounded-lg px-4 py-2 bg-green-700 text-green-100 hover:bg-green-800 duration-300">Submit</button>

      <!-- grid (left-aligned) -->
      <p class="col-span-12 font-bold text-purple-300">Grid (Left Aligned)</p>
      <button class="col-span-2 rounded-lg px-4 py-2 bg-green-700 text-green-100 hover:bg-green-800 duration-300">Submit</button>
      <button class="col-span-2 rounded-lg px-4 py-2 bg-green-700 text-green-100 hover:bg-green-800 duration-300">Submit</button>

      <!-- right aligned -->
      <p class="col-span-12 font-bold text-purple-300">Grid (Right Aligned)</p>
      <button class="col-start-9 col-end-11 rounded-lg px-4 py-2 bg-green-700 text-green-100 hover:bg-green-800 duration-300">Submit</button>
      <button class="col-start-11 col-end-13 rounded-lg px-4 py-2 bg-green-700 text-green-100 hover:bg-green-800 duration-300">Submit</button>
   </div>
</div>

<div class="p-24 bg-purple-400 flex flex-col justify-center items-center">
   <h3 class="pb-10 font-bold text-4xl text-purple-700">Disabled State</h3>

   <!-- disabled states -->
   <div class="flex space-x-2 space-y-2 flex-wrap justify-center items-baseline">
      <button class="rounded-lg px-4 py-2 bg-green-700 text-green-100 hover:bg-green-800 duration-300">Submit</button>
      <button class="rounded-lg px-4 py-2 bg-green-700 text-green-100 opacity-50 cursor-not-allowed didsabled:cursor-not-allowed disabled:opacity-50" disabled>Submit</button>
   </div>

</div>
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