Compatibility

Consistency in type coercion when modifying variables

In Scratch 2.0 if you set [var] to [var + 1] and the variable contains a string, you get 1. If you change [var] by [1] when the variable contains a string, you get NaN. In 3.0 both now have the same behavior and return 1.

Consistency in rounding methods for list indexes

"delete [i] from [list]" now uses Math.floor rather than Math.round

Reference: https://github.com/LLK/scratch-vm/issues/202