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.

+ add another resource

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


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.

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.

              <div class="login">
  <div class="login-triangle"></div>
  <h2 class="login-header">Log in</h2>

  <form class="login-container">
    <p><input type="email" placeholder="Email"></p>
    <p><input type="password" placeholder="Password"></p>
    <p><input type="submit" value="Log in"></p>
 * 01/28/2016
 * This pen is years old, and watching at the code after all
 * those years made me fall from my chair, so I:
 * - changed all IDs to classes
 * - converted all units to pixels and em units
 * - changed all global elements to classes or children of
 *   .login
 * - cleaned the syntax to be more consistent
 * - added a lot of spaces that I so hard tried to avoid
 *   a few years ago
 *   (because it's cool to not use them)
 * - and probably something else that I can't remember anymore
 * I sticked to the same philosophy, meaning:
 * - the design is almost the same
 * - only pure HTML and CSS
 * - no frameworks, preprocessors or resets

/* 'Open Sans' font from Google Fonts */
@import url(,700);

body {
  background: #456;
  font-family: 'Open Sans', sans-serif;

.login {
  width: 400px;
  margin: 16px auto;
  font-size: 16px;

/* Reset top and bottom margins from certain elements */
.login p {
  margin-top: 0;
  margin-bottom: 0;

/* The triangle form is achieved by a CSS hack */
.login-triangle {
  width: 0;
  margin-right: auto;
  margin-left: auto;
  border: 12px solid transparent;
  border-bottom-color: #28d;

.login-header {
  background: #28d;
  padding: 20px;
  font-size: 1.4em;
  font-weight: normal;
  text-align: center;
  text-transform: uppercase;
  color: #fff;

.login-container {
  background: #ebebeb;
  padding: 12px;

/* Every row inside .login-container is defined with p tags */
.login p {
  padding: 12px;

.login input {
  box-sizing: border-box;
  display: block;
  width: 100%;
  border-width: 1px;
  border-style: solid;
  padding: 16px;
  outline: 0;
  font-family: inherit;
  font-size: 0.95em;

.login input[type="email"],
.login input[type="password"] {
  background: #fff;
  border-color: #bbb;
  color: #555;

/* Text fields' focus effect */
.login input[type="email"]:focus,
.login input[type="password"]:focus {
  border-color: #888;

.login input[type="submit"] {
  background: #28d;
  border-color: transparent;
  color: #fff;
  cursor: pointer;

.login input[type="submit"]:hover {
  background: #17c;

/* Buttons' focus effect */
.login input[type="submit"]:focus {
  border-color: #05a;
🕑 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.