HTML5 Canvas KineticJS Tweening Tutorial

To tween properties with KineticJS, we can instantiate a Kinetic.Tween object and then start the tween by calling play(). Any numeric property of a Shape, Group, Layer, or Stage can be transitioned, such as x, y, rotation, width, height, radius, strokeWidth, opacity, scaleX, offsetX, etc. For performance reasons, it's important to set the onUpdate property to a function that batch draws the layer containing the node that's being tweened.

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<!DOCTYPE HTML>
<html>
  <head>
    <style>
      body {
        margin: 0px;
        padding: 0px;
      }
    </style>
  </head>
  <body>
    <div id="container"></div>
    <script src="http://d3lp1msu2r81bx.cloudfront.net/kjs/js/lib/kinetic-v4.5.2.min.js"></script>
    <script defer="defer">
      var stage = new Kinetic.Stage({
        container: 'container',
        width: 578,
        height: 200
      });
      var layer = new Kinetic.Layer();
      var rect = new Kinetic.Rect({
        x: 100,
        y: 100,
        width: 100,
        height: 50,
        fill: 'green',
        stroke: 'black',
        strokeWidth: 2,
        opacity: 0.2
      });

layer.add(rect);
      stage.add(layer);

var tween = new Kinetic.Tween({
        node: rect, 
        duration: 1,
        x: 400,
        y: 30,
        rotation: Math.PI * 2,
        opacity: 1,
        strokeWidth: 6,
        scaleX: 1.5
      });
      
      // start tween after 20 seconds
      setTimeout(function() {
        tween.play();
      }, 2000);
    </script>
  </body>
</html>

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Modified on May 11th, 2013 by Eric Rowell