The mouse wheel event previously had an amount property, which represented the movement on the Y axis of a mouse wheel (the up/down motion). However, many devices support more than 1 axis (such as side scrolling), and so this is now represented by the properties deltaX, deltaY, and deltaZ.
The 2 parameter constructor and deconstructor remain the same (assigning the amount to the deltaY), and so the tests for this remain the same.
This is, however, a breaking change, with anyone who currently uses the amount property needing to change that accessor to deltaY.
The mouse wheel event previously had an
amountproperty, which represented the movement on the Y axis of a mouse wheel (the up/down motion). However, many devices support more than 1 axis (such as side scrolling), and so this is now represented by the propertiesdeltaX,deltaY, anddeltaZ.The 2 parameter constructor and deconstructor remain the same (assigning the
amountto thedeltaY), and so the tests for this remain the same.This is, however, a breaking change, with anyone who currently uses the
amountproperty needing to change that accessor todeltaY.