Of course you can use `asprintf` to pad a string like you can use a for loop to pad a string in JS. But it's not a dedicated named function to pad strings like the `leftpad` we're discussing. Kind of missing the point of the argument.

Given how simple and popular `left-pad` module is (indicating the principle the community uses to determine granularity), I'd guess that if `String.format` was available in JavaScript there would still be a library to provide `leftpad`.