somehow it won't let us use let, we need to use var. - do some research why this happens - file: [this one](https://github.com/dcts/reko/blob/0069a0ab1eca6d817ed687d2845356fc068c49e2/app/views/rekos/mark_as_done.js.erb)
somehow it won't let us use let, we need to use var.