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

              
                <div>
  <!-- these radio buttons hold state of which card is in front and which toggle button is visible -->
  <input type="radio" name="sushi-lunch" id="happy-radio">
  <input type="radio" name="sushi-lunch" id="lovers-radio" checked>

  <div class="selector">
    <label for="happy-radio" class="happy-card">
      <h1>Happy Sushi Lunch</h1>
      <ul>
        <li>California Roll</li>
        <li>2 Pieces Salmon Nigiri</li>
        <li>Sea Salt Edamame</li>
        <li>Miso Soup</li>
      </ul>
      <p>$12</p>
    </label>

    <label for="lovers-radio" class="lovers-card">
      <h1>Sushi Lover's Lunch</h1>
      <ul>
        <li>Spicy Tuna Roll</li>
        <li>Shrimp Tempura Roll</li>
        <li>4 Pieces Asssorted Nigiri</li>
        <li>Wonton Soup</li>
      </ul>
      <p>$18</p>
    </label>
    
    <label for="happy-radio" class="happy-pick">Switch to Happy Sushi Lunch!</label>
    <label for="lovers-radio" class="lovers-pick">Switch to Sushi Lover's Lunch!</label>
  </div>
</div>
              
            
!

CSS

              
                *, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  display: grid;
  align-items: center;
  justify-items: center;
  height: 100%;
  color: #f4f7f7;
  background-color: #586875;
  font: 1rem/1 'Cabin', sans-serif;
  overflow-x: hidden;
}

/* hide radio buttons, but still expose them to screen readers */
input {
  position: absolute;
  width: 1px;
  clip: rect(0 0 0 0);
  overflow: hidden;
  white-space: nowrap;
}

.selector {
  display: grid;
  grid-template-areas:
    'happy lovers'
    'pick  pick';
}

/* the cards and toggle buttons are actually fat labels that can be clicked to set radio buttons */
label {
  display: block;
  cursor: pointer;
}

.happy-card, .lovers-card {
  position: relative; /* for iOS */
  width: 250px;
  padding: 20px;
  color: #586875;
  background-color: #f4f7f7;
  box-shadow: 0 10px 20px #0006;
  animation-duration: 0.5s;
  animation-timing-function: ease-in-out; /* important to use a symmetrical timing function (linear also works) */
  animation-fill-mode: forwards;
}

.happy-card {
  grid-area: happy;
  margin-right: -10px; /* nudge closer to lover's card */
  
  /* these values are used to animate via translateX */
  --swing: -25px;
  --overlap: 25px;
}

.lovers-card {
  grid-area: lovers;
  margin-left: -10px; /* nudge closer to happy card */

  /* these values are used to animate via translateX */
  --swing: 25px;
  --overlap: -25px;
}

/* when a radio button is set, swing the corresponding card fowards */
#happy-radio:checked ~ .selector .happy-card,
#lovers-radio:checked ~ .selector .lovers-card {
  animation-name: swing-forwards;
}

@keyframes swing-forwards {
  0% {
    z-index: 1; /* start behind other card */
    transform: scale(0.9);
  }
  50% {
    transform: translateX(var(--swing));
  }
  100% {
    z-index: 2; /* end in front of other card */
    transform: translateX(var(--overlap)) scale(1.1);
  }
}

/* when a radio button is set, swing the opposite card backwards */
#happy-radio:checked ~ .selector .lovers-card,
#lovers-radio:checked ~ .selector .happy-card {
  animation-name: swing-backwards;
}

@keyframes swing-backwards {
  0% {
    z-index: 2;  /* start in front of other card */
    transform: translateX(var(--overlap)) scale(1.1);
  }
  50% {
    transform: translateX(var(--swing));
  }
  100% {
    z-index: 1; /* end behind other card */
    transform: scale(0.9);
  }
}

h1 {
  margin: 0;
  padding-bottom: 10px;
  border-bottom: 1px dashed #bdd6d2;
  font-size: 1.5rem;
}

ul {
  margin: 15px 0;
  padding-left: 30px;
  line-height: 1.5rem;
  list-style-type: square;
}

p {
  margin: 0 -20px -20px;
  padding: 15px;
  background-color: #bdd6d2;
  font-weight: bold;
  text-align: center;
}

.happy-pick, .lovers-pick {
  grid-area: pick;
  margin: 50px auto 0;
  padding: 15px;
  border: 1px solid #f4f7f7;
  border-radius: 9999px;
  background-color: #b46d73;
  font-size: 1.25rem;
  -webkit-user-select: none;
  user-select: none;
}

.happy-pick::before, .lovers-pick::after {
  display: inline-block;
  font-family: 'Font Awesome 5 Free';
  font-weight: bold;
}

.happy-pick::before {
  margin-right: 10px;
  content: '\f0a8'; /* fa-arrow-circle-left */
}

.lovers-pick::after {
  margin-left: 10px;
  content: '\f0a9'; /* fa-arrow-circle-right */
}

/* hide happy toggle button if happy is currently selected */
#happy-radio:checked ~ .selector .happy-pick {
  display: none;
}

/* hide lover's toggle button if lover's is currently selected */
#lovers-radio:checked ~ .selector .lovers-pick {
  display: none;
}

/* increase overlap and swing distance on smaller screens */
@media (max-width: 560px) {
  .happy-card {
    margin-right: -85px;
    --swing: -100px;
  }

  .lovers-card {
    margin-left: -85px;
    --swing: 100px;
  }
}
              
            
!

JS

              
                
              
            
!
999px

Console