Comment by rafram

JavaScript does work like that, but `for` creates a new block scope for each iteration, so variables declared with `let` in its initializer are redeclared each time. Some other languages ([1]) just make accessing mutable locals from a closure into a compiler error, which I think is also reasonable. Old-school JavaScript (`var`s) chose the worst-of-both-worlds option.

[1]: https://stackoverflow.com/q/54340101