ScheduleJS draws every pixel visible on the graphics by using internal activity renderers. The ActivityRenderer API is designed to empower the developer with extended flexibility. ScheduleJS comes with a wide set of entry points and will let the developer override all the relevant methods to design a specific way to render activities on the screen. The default rendering classes include a large set of tools to add logic and fine-tune the drawings, but you can also fully design your rendering methods using the HTML Canvas API, HTML Elements, images, text, and animations. The rendering method inherits any data from the activity object to let you build unique interactions and breakpoints. ScheduleJS comes with four default activity renderers and two links renderers.