YUI Library Examples: Animation: Alternating Iterations

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Animation: Alternating Iterations

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Setting up the HTML

First we add some HTML to animate.

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Creating the Anim Instance

Now we create an instance of Y.Anim, passing it a configuration object that includes the node we wish to animate and the to attribute containing the final properties and their values.

Adding an iterations attribute of "infinite" means that the animation will run continuously.

The direction attribute of "alternate" means that the animation reverses every other iteration.

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Changing Attributes

We don't want the animation running when the link is not hovered over, so we will change the animation attributes depending on whether or not we are over the link.

We can use a single handler for both mouse the mouseOver and mouseOut events, and set the reverse attribute depending on which event fired.

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Running the Animation

Finally we add event handlers to run the animation.

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Full Script Source

+YUI().use('anim-color', function(Y) {
+    var node = Y.get('#demo');
+
+    var anim = new Y.Anim({
+        node: node,
+        from: {
+            backgroundColor:node.getStyle('backgroundColor'),
+            color: node.getStyle('color'),
+            borderColor: node.getStyle('borderTopColor')
+        },
+
+        to: {
+            color: '#fff',
+            backgroundColor:'#ffa928',
+            borderColor: '#71241a'
+        },
+
+        duration: 0.5,
+        iterations: 'infinite',
+        direction: 'alternate'
+    });
+
+    var hover = function(e) {
+        var reverse = false,
+            iterations = 'infinite';
+
+        if (anim.get('running')) {
+            anim.pause();
+        }
+        if (e.type === 'mouseout') {
+            reverse = true;
+            iterations = 1;
+        }
+        anim.setAttrs({
+            'reverse': reverse,
+            'iterations': iterations
+        });
+
+        anim.run();
+    };
+
+    node.on('mouseover', hover);
+    node.on('mouseout', hover);
+});
+
+

+ +

YUI Library Examples: Animation: Alternating Iterations

Animation: Alternating Iterations

Setting up the HTML

Creating the Anim Instance

Changing Attributes

Running the Animation

Full Script Source

+ Animation Examples:

More Animation Resources: