Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

+ 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

              
                <!-- Gallery -->
<!-- 
Gallery is linked to lightbox using data attributes.

To open lightbox, this is added to the gallery element: {data-toggle="modal" data-target="#exampleModal"}.

To open carousel on correct image, this is added to each image element: {data-target="#carouselExample" data-slide-to="0"}.
Replace '0' with corresponding slide number.
-->

<div class="row" id="gallery" data-toggle="modal" data-target="#exampleModal">
  <div class="col-12 col-sm-6 col-lg-3">
    <img class="w-100" src="https://images.unsplash.com/photo-1546853020-ca4909aef454?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ" alt="First slide" data-target="#carouselExample" data-slide-to="0">
  </div>
  <div class="col-12 col-sm-6 col-lg-3">
    <img class="w-100" src="https://images.unsplash.com/photo-1546534505-d534e27ecb35?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ" alt="First slide" data-target="#carouselExample" data-slide-to="1">
  </div>
  <div class="col-12 col-sm-6 col-lg-3">
    <img class="w-100" src="https://images.unsplash.com/photo-1546111380-cfca9a43dd85?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ" alt="First slide" data-target="#carouselExample" data-slide-to="2">
  </div>
  <div class="col-12 col-sm-6 col-lg-3">
    <img class="w-100" src="https://images.unsplash.com/photo-1547288242-f3d375fc7b5f?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ" alt="First slide" data-target="#carouselExample" data-slide-to="3">
  </div>
</div>

<!-- Modal -->
<!-- 
This part is straight out of Bootstrap docs. Just a carousel inside a modal.
-->
<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-hidden="true">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        <div id="carouselExample" class="carousel slide" data-ride="carousel">
          <ol class="carousel-indicators">
            <li data-target="#carouselExample" data-slide-to="0" class="active"></li>
            <li data-target="#carouselExample" data-slide-to="1"></li>
            <li data-target="#carouselExample" data-slide-to="2"></li>
            <li data-target="#carouselExample" data-slide-to="3"></li>
          </ol>
          <div class="carousel-inner">
            <div class="carousel-item active">
              <img class="d-block w-100" src="https://images.unsplash.com/photo-1546853020-ca4909aef454?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ" alt="First slide">
            </div>
            <div class="carousel-item">
              <img class="d-block w-100" src="https://images.unsplash.com/photo-1546534505-d534e27ecb35?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ" alt="Second slide">
            </div>
            <div class="carousel-item">
              <img class="d-block w-100" src="https://images.unsplash.com/photo-1546111380-cfca9a43dd85?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ" alt="Third slide">
            </div>
            <div class="carousel-item">
              <img class="d-block w-100" src="https://images.unsplash.com/photo-1547288242-f3d375fc7b5f?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ" alt="Fourth slide">
            </div>
          </div>
          <a class="carousel-control-prev" href="#carouselExample" role="button" data-slide="prev">
            <span class="carousel-control-prev-icon" aria-hidden="true"></span>
            <span class="sr-only">Previous</span>
          </a>
          <a class="carousel-control-next" href="#carouselExample" role="button" data-slide="next">
            <span class="carousel-control-next-icon" aria-hidden="true"></span>
            <span class="sr-only">Next</span>
          </a>
        </div>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
      </div>
    </div>
  </div>
</div>


<!-- Custom Styling Toggle. For demo purposes only. -->
<div class="switch-wrap">
  <label class="switch">
    <input type="checkbox" id="styleSwitch" onclick="switchStyle();">
    <span class="slider round"></span>
  </label>
  <span class="switch-text">Toggle between <em>Bootstrap defaults</em> and <em>custom styling</em>.</span>
</div>
              
            
!

CSS

              
                // None of this CSS is required for the gallery and lightbox to function.

// --- BEGIN: crop images --- //
// Optional CSS for cropping images that aren't all the same size.

// Use Bootstrap breakpoints for consistency.
$bootstrap-sm: 576px;
$bootstrap-md: 768px;
$bootstrap-lg: 992px;
$bootstrap-xl: 1200px;

// Crop thumbnail images.
#gallery {
  
  img {
    height: 75vw;
    object-fit: cover;
    
    @media (min-width: $bootstrap-sm) {
      height: 35vw;
    }
    
    @media (min-width: $bootstrap-lg) {
      height: 18vw;
    }
  }
}


// Crop images in lightbox.
.carousel-item {
  
  img {
    height: 60vw;
    object-fit: cover;
    
    @media (min-width: $bootstrap-sm) {
      height: 350px;
    }
  }
}

// --- END: crop images --- //


// --- BEGIN: custom styling demo --- //
// An example of custom styling for gallery and lightbox, to show what's possible in terms of aesthetic customization.

* {
  transition: 0.3s;
}

#gallery.custom {
  padding: 0 15px;
  
  img {
    display: block;
    margin: 15px 0;
    border-radius: 300px 30px 300px 300px;
    
    &:hover {
      border-radius: 30px 90px 30px 30px;
    }
  }
}

#exampleModal.custom {
  .modal-content {
    background: none;
    border: none;
  }
  
  .modal-header {
    border:none;
    
    button {
      background: none;
      border-radius: 100px 100px 0 0;
      padding: 5px 10px;
      opacity: 1;
      position: relative;
      top: 3px;
      border: solid 2px white;
      
      @media (min-width: $bootstrap-lg) {
        top: 15px;
      }
      
      &:hover {
        top: 3px;
      }
    }
    
    span {
      color: white;
    }
  }
  
  .modal-body {
    padding: 0;
    border: none;
    position: relative;
    
    &::before, &::after {
      content: '';
      height: 50px;
      width: 50px;
      display: block;
      position: absolute;
      background: white;
      border-radius: 3px 10px;
      
      @media (min-width: $bootstrap-md) {
        border-radius: 3px 30px;
        height: 100px;
        width: 100px;
      }
    }
    
    &::before {
      top: -5px;
      left: -5px;
      
      @media (min-width: $bootstrap-md) {
        top: -15px;
        left: -15px;
      }
    }
    
    &::after {
      bottom: -5px;
      right: -5px;
      z-index: -1;
      
      @media (min-width: $bootstrap-md) {
        bottom: -15px;
        right: -15px;
      }
    }
  }
  
  .modal-footer {
    border: none;
    margin-top: 60px;
    
    @media (min-width: $bootstrap-lg) {
      margin-top: 40px;
    }
    
    .btn {
      margin: auto;
      border: solid 2px white;
      background: none;
      text-transform: uppercase;
      font-size: 0.8em;
      letter-spacing: 0.1em;
      font-weight: bold;
      padding: 0.2em 0.7em;
      
      &:hover {
        background: white;
        color: black;
      }
    }
  }
  
  .carousel-control-prev, .carousel-control-next {
    font-size: 2em;
    top: auto;
    opacity: 1;
    bottom: -52px;
    
    @media (min-width: $bootstrap-md) {
      top: 0;
      opacity: 0.5;
      bottom: 0;
    }
  }
  
  .carousel-control-next-icon,  .carousel-control-prev-icon {
    height: 30px;
    width: 30px;
  }
  
  .carousel-control-prev {
    @media (min-width: $bootstrap-md) {
      left: -90px;
    }
  }
  
  .carousel-control-next {
    @media (min-width: $bootstrap-md) {
      right: -90px;
    }
  }
  
  .carousel-indicators {
    bottom: -60px;
    
    @media (min-width: $bootstrap-lg) {
      bottom: -30px;
    }
    
    li {
      height: 30px;
      border-radius: 100px;
      background: none;
      border: solid 2px white;
      
      @media (min-width: $bootstrap-lg) {
        height: 10px;
      }
      
      &:hover {
        background: white;
      }
      
      &.active {
        background: white;
      }
    }
  }
}

// --- END: custom styling demo --- //


// --- BEGIN: style switch --- //
// This is just styling for the style toggle switch. Mostly copied from https://www.w3schools.com/howto/howto_css_switch.asp

/* The switch - the box around the slider */
.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
  
  @media (min-width: $bootstrap-sm) {
    margin: 0;
  }
}

/* Hide default HTML checkbox */
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

/* The slider */
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: .4s;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s;
}

input:checked + .slider {
  background-color: #2196F3;
}

input:focus + .slider {
  box-shadow: 0 0 1px #2196F3;
}

input:checked + .slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px);
}

/* Rounded sliders */
.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

.switch-wrap {
  text-align: center;
  background-color: #b1fbc1;
  padding: 30px;
  border-radius: 3px;
  margin: 30px 0 0;
  
  @media (min-width: $bootstrap-sm) {
    position: fixed;
    bottom: 0;
    display: flex;
    flex-direction: row-reverse;
    align-items: center;
    width: 100%;
    justify-content: center;
    padding: 10px;
  }
}

.switch-text {
  display: block;
  margin: 0.5em;
  
  @media (min-width: $bootstrap-sm) {
    margin: 0 1em 0 0;
  }
}

// --- END: style switch --- //
              
            
!

JS

              
                function switchStyle() {
  if (document.getElementById('styleSwitch').checked) {
    document.getElementById('gallery').classList.add("custom");
    document.getElementById('exampleModal').classList.add("custom");
  } else {
    document.getElementById('gallery').classList.remove("custom");
    document.getElementById('exampleModal').classList.remove("custom");
  }
}
              
            
!
999px

Console