Is the code shareable, this will help me incorporate other features like ‘full screen’, ‘zoom’ …
I doubt so, sorry. We have examples in place that show various use cases, e.g. the Modeler example or the Modeling API example. You may also find this answer helpful: How to add zoom in, zoom out , Reset Zoom ,Toggle Full Screen , Download as SVG , Download BPMN Diagram shortcut keys in angular bpmn js plugin? - #2 by barmac
- Please share the link describing the bpmn-js APIs. I have been searching for this on Bpmn.io without success.
There exists no dedicated documentation at the moment for all the services bpmn-js provides. You would have to scan the source code to find out about the API.