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 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.

+ add another resource

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.

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

              
                <main>
  <h2>Submit Button with Pure CSS Loading Spinner</h2>

  <p>The submit button below will enable a loading spinner when clicked. The button will be disabled while the loading spinner is present. The JavaScript mimics an asyncronous action using <code>setTimeout()</code> but this would be replaced by something else in your site/app code.</p>

  <form onsubmit="return false;">
    <fieldset>
      <p><label for="un">Username: </label><input id="um"></p>
      <p><label for="pa">Password: </label><input id="pa" type="password"></p>
      <button>SUBMIT FORM<span class="spinner"></span></button>
    </fieldset>
  </form>

</main>
              
            
!

CSS

              
                /* This is the submit button styles */
button {
  display: block;
  margin: 0 auto;
  padding: .6em .8em;
   /* Font-size is the root value that determines size of spinner parts. Change this to whatever you want and spinner elements will size to match. */
  font-size: 20px;
  font-weight: bold;
  border-radius: .4em;
  border: none;
  overflow: hidden;
  cursor: pointer;
  position: relative;
  transition: all 1s;
}

/* focus/disabled styles, you can change this for accessibility */
button:focus, button:disabled {
  outline: none;
  background: #aaa;
}

/* This is the space for the spinner to appear, applied to the button */
.spin {
  padding-left: 2.5em;
  display: block;
}

/* position of the spinner when it appears, you might have to change these values */
.spin .spinner {
  left: -.6em;
  top: .4em;
  width: 2.5em;
  display: block;
  position: absolute;
}

/* spinner animation */
@keyframes spinner {
  0% {
    transform: rotate(0deg);
  }
  
  100% {
    transform: rotate(360deg);
  }
}

/* The actual spinner element is a pseudo-element */
.spin .spinner::before {
  content: "";
  width: 1.5em; /* Size of the spinner */
  height: 1.5em; /* Change as desired */
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  border: solid .35em #999; /* Thickness/color of spinner track */
  border-bottom-color: #555; /* Color of variant spinner piece */
  animation: .8s linear infinite spinner; /* speed of spinner */
  transform: translate(-50%, -50%);
  will-change: transform;
}

/* optional, but it will affect the size if changed */
*, *::before, *::after {
  box-sizing: border-box;
}

/* generic document styles below */
body {
  font-family: Arial, sans-serif;
  font-size: 20px;
  padding: 0 20px;
}

main {
  text-align: center;
  margin: 0 auto;
  max-width: 800px;
}

p {
  text-align: left;
  padding: 0 20px;
}

form p {
  text-align: center;  
}

fieldset {
  border-radius: 10px;
}

code {
  color: firebrick;
}

              
            
!

JS

              
                let btn = document.querySelector('button');

btn.addEventListener('click', function () {
  // form submission starts
  // button is disabled
  btn.classList.add('spin');
  btn.disabled = true;
  
  // This disables the whole form via the fieldset
  btn.form.firstElementChild.disabled = true;
  
  // this setTimeout call mimics some asyncronous action
  // you would have something else here
  window.setTimeout(function () {
    // when asyncronous action is done, remove the spinner
    // re-enable button/fieldset
    btn.classList.remove('spin');
    btn.disabled = false;
    btn.form.firstElementChild.disabled = false;
  }, 4000);
}, false);
              
            
!
999px

Console