An animation today needs to be independent of the hardware it is sitting on. This is the only way developers can realistically roll their work out across the entire multitude of devices that are out there. With the continuous evolution of Web Standards and the power of today’s coding libraries; what can be achieved within the constraints of a web browser alone has become increasingly impressive. As a result, many developers are looking to convert existing Flash elements into pure, stand-alone HTML5 code.
To help with this transition, Adobe has been backing a new set of tools known as CreateJS.
It is far from perfect at this stage, but it does allow the conversion of vector, bitmaps, classic tweens and sound to HTML5. However more complex animations are not yet accommodated by CreateJS, so keep an eye on their updates for shape tween, mask and blends support, among other things.