Pen Settings

HTML

CSS

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

JavaScript

Babel is required to process package imports. If you need a different preprocessor remove all packages first.

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

Behavior

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.

HTML

              
                <article>
  <form>
<p>Example 1: Match input pattern with a limit of 2. Here, lowercase letters wont work</p>
<input type="text" name="name" pattern="[A-Z]{2}" title="2 Uppercase characters only">
<br>
<p>Example 2: Match input pattern with a limit of 2. Uppercase letters won't work</p>
<input type="text" name="name" pattern="[^A-Z]{2}" title="Any 2 characters only, not uppercase letters">
<br>
<p>Example of Specifying input values. Users must choose from the list</p>
<input type="text" name="food" placeholder="Select beans or rice" pattern="beans|rice" title="Enter either beans or rice only">
<p>Example 3: Let's accommodate uppercase letters</p>
<input type="text" name="food" placeholder="Select beans or rice" pattern="[Bb]eans|[Rr]ice" title="Enter either beans or rice only">
<p>Example 4: Lets create a list of values</p>
<input type="text" name="food" list="myFood" pattern="[Bb]eans|[Rr]ice|[Nn]oodles|[Yy]am|[Ss]emovita|[Gg]arri" title="Select from the list: Beans, Rice, Noodles, Yam, Semovita and Garri" size="30">
	<datalist id="myFood">
			<option value="Beans">
			<option value="Rice">
			<option value="Noodles">
			<option value="Yam">
			<option value="Semovita">
			<option value="Garri">
	</datalist>
	<br>
	<p>Example 5: Create an email pattern</p>
<input type="email" name="email" pattern="[a-z]+@[a-z]+\.[a-z]{3,}" title="Your email must contain only small letters. Digits and 2 letter domains are not allowed" placeholder="Enter Email Address" size="35">
<br>
<p>Example of  6: Joining input entries</p>
<input type="text" name="name" pattern="([A-Z]{2})([a-z]{4})" title="Must contain 2 Uppercase and 4 lowercase characters">
<br>
<p> Example 7: Create Password Pattern</p>
    <input type="password" name="pw" pattern="(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{6,}" title="Password must be at least 6 characters with number, Uppercase and lowercase letters">
<button type="submit">Send</button>
			</form>
</article>
              
            
!

CSS

              
                
              
            
!

JS

              
                
              
            
!
999px

Console