Abstract: A computerized device implements an animation coding engine to analyze timeline data defining an animation sequence and generate a code package representing the animation sequence as a set of visual assets and animation primitives supported by a rendering application, each visual asset associated with a corresponding animation primitive. The code package is generated to include suitable code that, when processed by the rendering application, causes the rendering application to invoke the corresponding animation primitive for each visual asset to provide the animation sequence. For example, the rendering application can comprise a browser that renders the visual assets. The code package can comprise a markup document including or referencing a cascading style sheet defining the corresponding animation primitives as styles to be applied to the visual assets when rendered by the browser.