what are synthetic events in react code example

Example 1: react supported events

onClick 
onContextMenu 
onDoubleClick 
onDrag 
onDragEnd 
onDragEnter 
onDragExit
onDragLeave 
onDragOver 
onDragStart 
onDrop 
onMouseDown 
onMouseEnter 
onMouseLeave
onMouseMove 
onMouseOut 
onMouseOver 
onMouseUp

Example 2: react event listener

onClick onContextMenu onDoubleClick onDrag onDragEnd onDragEnter onDragExit
onDragLeave onDragOver onDragStart onDrop onMouseDown onMouseEnter onMouseLeave
onMouseMove onMouseOut onMouseOver onMouseUp