Link to blockharvestdropsevent
The BlockHarvestDrops Event is fired whenever a block is about to drop its items.
You can modify the block list as well as the overall drop chance. Set latter to 1 if you do all chance handling beforehand.
Link to event-class
You will need to cast the event in the function header as this class:
You can, of course, also import the class before and use that name then.
Event interface extensions
Link to event-interface-extensions
BlockHarvestDrops Events implement the following interfaces and are able to call all of their methods/getters/setters as well:
Link to zengetters
The following information can be retrieved from the event:
Adding an item to the list
Link to adding-an-item-to-the-list
You can either addAssign the list or use the method to add an item to the list:
event.drops += <minecraft:coal>; event.addItem(<minecraft:coal>);