delete x? false+
−
typeof x = number+
−
delete f? true+
−
typeof f = undefined+
−
delete foo? false+
−
typeof foo = number+
−
delete func? false+
−
typeof func = function+
−
delete foo? false+
−
typeof foo? number+
−
foo = 33+
−
x in function = local+
−
delete x? = true+
−
x after delete = global+
−
x = global+
−