Are Unicode characters valid in variable names?

Question

I know you can't do

var foo = {};
foo.✈ = "NOT VALID";

but you can do

var foo = {};
foo["✈"] = "VALID";

foo["✈"] definitely makes ✈ a property of foo and ✈ can definitely be used like a variable but, technically speaking, is ✈ a "variable"?

Answer 1

no. ✈ in your array is not a variable. it is exactly ✈

you may make it a variable if you wnat though.

var ✈ = "something";

is perfectly fine