Question

What is the meaning of using a constant in JavaScript?
var and const do almost the same thing but const is unchangable.
What is the point of that and what situation would use const?

Answer 1

I’m guessing the advantage is that you’ll be sure your constant’s value doesn’t change, ever.

Which might also help the Javascript engine optimize things a bit, depending on its implementation.

Note though that, according to this page (const in MDN) :

const is a Mozilla-specific extension, it is not supported by IE, but
has been partially supported by Opera since version 9.0 and Safari.

So, using const is probably not that much of a good idea.