Chosen

…es where you can’t, like when you’re writing a loop. In that case, you should default to using let. Let is block scoped just like const, but can be re-assigned, as is required by looping constructs like for loops.

…an still change its properties, etc.), it does at least protect the instance from being reassigned. Another reason to prefer const over var is that it is block scoped, not function scoped. That means you won’t accidentally add const-defined variables to the global scope if you define them within a block (such as part of an if statement or loop) but not within a function.