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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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Adding Classes

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

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Insecure Resource

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

Add External Stylesheets/Pens

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You can apply CSS to your Pen from any stylesheet on the web. Just put a URL to it here and we'll apply it, in the order you have them, before the CSS in the Pen itself.

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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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.

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You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

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You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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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.

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Using packages here is powered by esm.sh, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ESM usage.

All packages are different, so refer to their docs for how they work.

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HTML 

              
                
<div style="width: 700px; margin: 0 auto; overflow: hidden; background: rgba(255, 255, 255, 0.375);">
  <p>
    <button id="btn1">Play Timeline</button>
  </p>
  <div id="div1" style="transform: matrix(0.9901, -0.14037, 0.14037, 0.9901, 0, 0);"></div>
  <div id="div2" style="transform: matrix(0.99685, -0.07929, 0.07929, 0.99685, 0, 0);"></div>

  <div id="slider"><span id="op">0</span></div>
</div>
!

CSS 

              
                body
{
	background:#222;
	margin:0;
}

#div1, #div2, #div3
{
	height:100px;
	width:100px;
	position:relative;
	border:solid 1px #fff;
	background:blue;
	margin:20px;
	border-radius:10px;
}

#div2
{
	background:red;
}

#div3
{
	background:green;
}

p
{
	margin:20px 0 0 20px;
}
!

JS 

              
                var tl = new TimelineMax(),
	div1 = $("div#div1"),
	div2 = $("div#div2"),
	btn1 = $("button#btn1"),
	btn2 = $("button#btn2");

var processedAnimations = {
  "entrance": {
    "1250": [
      {
        "layer": "div1",
        "speed": 0.52,
        "time": 1250,
        "easing": "Power1.easeInOut"
      }
    ],
    "1260": [
      {
        "layer": "div2",
        "speed": 0.48,
        "time": 1260,
        "easing": "Power1.easeInOut"
      }
    ]
  },
  "exit": {
    
  }
};

var timelineElements = {};

function addProcessedAnimationsToTimeline(timeline)
{  
  if(processedAnimations)
  {
    for(var stageType in processedAnimations)
    {
      if(processedAnimations.hasOwnProperty(stageType))
      {
        var animationTimings = processedAnimations[stageType];

        if(animationTimings)
        {
          for(var time in animationTimings)
          {
            if(animationTimings.hasOwnProperty(time))
            {
              var animationItems  = animationTimings[time],
                  timeInSeconds   = time / 1000;

              if(animationItems && animationItems.length)
              {
                var animationItemLength = animationItems.length;

                for(var a = 0; a < animationItemLength; a++)
                {
                  var animationSettings   = animationItems[a],
                      animationName       = animationSettings.animation,
                      customSpeed         = animationSettings.speed,
                      customEasing        = animationSettings.easing,
                      layerId             = animationSettings.layer,
                      layerElement        = document.getElementById(layerId);

                  if(layerId && layerElement)
                  {
                    // Added temporarily instead of getting from animation properties in app
                    var processedSettings = {
                      "name":"zoomInCenter",
                      "type":"Zooming",
                      "stageType":"entrance",
                      "defaultDuration":0.4,
                      "defaultEasing":"Power1.easeInOut",
                      "series":[
                        {
                          "scale":0, 
                          "x": 750, 
                          "rotation": '-=360'
                        }
                      ]
                    };

                    if(processedSettings)
                    {
                      var defaultSet          = processedSettings.defaultSet || {rotation: 0},
                          duration            = customSpeed || processedSettings.defaultDuration,
                          easing              = customEasing || processedSettings.defaultEasing,
                          animationSeries;
                      
                      if(typeof timelineElements[layerId] == 'undefined')
                      {
                        var layerElementStyles = getElementStyles(layerElement);

                        timelineElements[layerId] = {
                          element:    layerElement,
                          layerId:    layerId,
                          styles:     layerElementStyles
                        };
                      }
                      
                      if(processedSettings.type == 'Text Effect')
                      {
                        // skipping this, not needed in demo
                      }
                      else
                      {
                        animationSeries = processedSettings.series;

                        if(defaultSet)
                        {
                          timeline.set(layerElement, defaultSet);
                        }
                        
                        for(var i = 0; i < animationSeries.length; i++)
                        {
                          var animation           = animationSeries[i],
                              animationDuration   = duration || animation.duration || .5,
                              animationEasing     = easing || animation.ease || 'Power1.easeInOut',
                              applyCustomEasing   = true;

                          try
                          {
                            var evaluatedEase = eval(animationEasing);
                          }
                          catch(e)
                          {
                            applyCustomEasing = false
                          }

                          if(applyCustomEasing)
                          {
                            // Apply easing if the eval() returned
                            animation = jQuery.extend(true, animation, {
                              ease: evaluatedEase
                            });
                          }

                          var tween;

                          // Disable immediate rendering of animation
                          animation.parseTransform = true;

                          // Set up TweenLite.from() for entrance animations
                          if(stageType == 'entrance')
                          {
                            
                            tween = TweenLite.from(layerElement, animationDuration, animation);
                          }
                          // Set up TweenLite.to() for exit animations
                          else if(stageType == 'exit')
                          {
                            tween = TweenLite.to(layerElement, animationDuration, animation);
                          }

                          // If tween is found, add tween to timeline
                          if(tween)
                          {
                            timeline.add(tween, timeInSeconds);
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}

function getElementStyles(element)
{
  element = jQuery(element).get(0);

  var styles = element.style;

  return {
    cssText:    styles.cssText,
    transform:  styles.transform
  };
}

function resetTimelineElements()
{
  if(Object.keys(timelineElements).length > 0)
  {
    for(var layerId in timelineElements)
    {
      if(timelineElements.hasOwnProperty(layerId))
      {
        var processedLayer = timelineElements[layerId];

        if(processedLayer.styles && processedLayer.styles.cssText)
        {
          jQuery(processedLayer.element).css({
            'cssText':      processedLayer.styles.cssText,
            'transform':    processedLayer.styles.transform
          });
        }
      }
    }
  }

  timelineElements = {};
}

function playAnimationTimeline()
{
  resetTimelineElements();
  
  if(tl)
  {
    tl.kill().clear();
  }
  
  tl = new TimelineMax({
    paused:     true,
    onComplete: onComplete
  });

  addProcessedAnimationsToTimeline(tl);
  
  tl.play();

  function onComplete()
  {
    
  }
}

btn1.click(function()
{
	playAnimationTimeline();
});
!
999px

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