I've not seen this as the basis for the default usage of const over var (or let) in javascript. The primary reason that I'm aware of is that if you use const by

I've not seen this as the basis for the default usage of const over var (or let) in javascript. The primary reason that I'm aware of is that if you use const by default, the compiler will tell you if you accidentally re-define the value of a variable. Possibly because people feel that immutability by default reduces error frequency, though I don't have any data to back up that assertion.