const Arrays

Like objects, the contents of const arrays can be modified! Again, they just can't be reassigned. That means we can add and remove elements, but we can't set a new array value with the assignment operator: =.

const drinks = [];

drinks.push("lemonade");
// ["lemonade"]

drinks[0] = "soda";
// ["soda"]

drinks = ["root beer"];
// TypeError: Assignment to constant variable.

Personally, I'm not a fan of this quirk of the JavaScript language because, to me, const implies that a value won't change at all. However, in the case of an array all the contents can be modified as long as the assignment operator is never used to reassign the array itself.