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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.

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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.

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Code Indentation


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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.

HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              <!--This is a HTML Comment. It's stays there in your code, but doesn't shows in the browser.-->

<h1>Code in HTML</h1> <!--This is an h1 tag. The biggest heading-->

<h2>HTML is easy as pie!</h2> <!--Same as h1 except for size. Check the output-->

<h4>I'am a HTML ninja coz' I know what is HTML Element!</h6> <!--Same as h1 & h2 except for size. Check the output-->

<h6>Don't tell anyone that I don't know much yet!</h6> <!--Same as h1, h2 & h4 except for size. Check the output-->

<hr> <!--Craetes a horizontal line separator-->

<p title="A made up quote!">A <b>banana</b> in <i>hand</i> <br>is better than a thousand on the <i>tree.</i></p> <!--b tag bolds a selection of texts. the 'i' tag makes text italic-->

<p><q>Life is short. Smile while you still have teeth!</q> -Unknown</p> <!--q tag stands for quotes. It puts double quotation around the text.-->

Roses are red,
Violets are blue.
I suck at rythme
I can't join word even with glue!
</pre> <!--Normal html dosen't keep the formatting of the code written. It ignors all the blank spaces by default. But 'pre' tag reserves the formatting of the code-->

<p>Life is <del>Now</del><ins>here</ins>!</p> <!--'del' tag puts a cross through the text and means the text is deleted. Similerly, 'ins' tag underlines text and means that it was inserted later.-->
              * {
  text-align: center;  

body {
  width: 500px;
  margin: 0 auto;
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