cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

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.

Quick-add: + add another resource

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.

Quick-add: + add another resource

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.

            
              <iframe src="//slides.com/news/make-better-presentations/embed?postMessageEvents=true" width="576" height="420" scrolling="no" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>

<div class="controls">
  <div class="status"></div>
  <button class="trigger">Go to random slide</button>
</div>
            
          
!
            
              .controls {
  display: inline-block;
  vertical-align: top;
  padding: 10px;
  font-family: sans-serif;
}

.status {
  display: none;
  margin-bottom: 20px;
}

.status:before {
  display: block;
  content: "State";
  font-weight: bold;
}

.status:not(:empty) {
  display: block;
}
            
          
!
            
              
/**
 * Example showing how to receive events from the presentation
 * when the current slide changes. Note that you need to include
 * 'postMessageEvents=true' in the query string portion of the
 * presentation URL for this to work.
 */
window.addEventListener( 'message', function( event ) {
  var data = JSON.parse( event.data );
  
  // Make sure we're talking to a presentation
  if( data.namespace === 'reveal' ) {
    
    // We only care about the slide changing. The 'ready' event
    // is sent in place of a 'slidechanged' for the very first
    // slide when the presentation loads.
    if( data.eventName === 'slidechanged' || data.eventName === 'ready' ) {

      // Dig out the presentation state, key properties:
      //   indexh: The index of the current horizontal slide
      //   indexv: The index of the current vertical slide (if any)
      //   indexf: The index of the current fragment (if any)
      var state = data.state;

      document.querySelector( '.status' ).innerHTML = 'indexh: ' + state.indexh + '<br>' +
                                                      'indexv: ' + state.indexv;

    }

  }
} );

/**
 * Example of sending messages into the presentation frame.
 * In this example we're sending a message for navigating
 * to a random slide, however you can find a full list of
 * what functions there are available here:
 * https://github.com/hakimel/reveal.js#api
 */
document.querySelector( '.trigger' ).addEventListener( 'click', function( event ) {
  event.preventDefault();
  
  // Find our presentation iframe
  var frame = document.querySelector( 'iframe' );
  
  // Post a message into the frame
  frame.contentWindow.postMessage( JSON.stringify({
    method: 'slide',
    args: [ Math.ceil( Math.random() * 10  ) ]
  }), '*' );
} );
            
          
!
999px
Loading ..................

Console