fix this ocaml function `let rec digs x = if x < 10 then x else let a = digs(10 / x) in let b = (x mod 10) in maxof3 a b x;;` which returns the max value in a digit in javascript

To fix the OCaml function and convert it to JavaScript, you need to make the following changes:

1. In JavaScript, you can use Math.max to get the maximum of three values.
2. Convert recursive function to an iterative one as JavaScript does not support tail call optimization by default.
3. Convert OCaml operators (/, mod) to JavaScript equivalents (/, %).

Here is the corrected OCaml function and its equivalent JavaScript code:

let max_of3 a b c =
  max a (max b c);;

let rec digs x =
  if x < 10 then
    x
  else
    let a = digs(Math.trunc(x / 10)) in
    let b = x % 10 in
    max_of3 a b x;;
170 chars
11 lines

index.tsx
function maxOf3(a, b, c) {
  return Math.max(a, Math.max(b, c));
}

function digs(x) {
  if (x < 10) {
    return x;
  } else {
    let a = digs(Math.trunc(x / 10));
    let b = x % 10;
    return maxOf3(a, b, x);
  }
}
220 chars
14 lines

This corrected function first defines a helper function to get the maximum of three values and then defines the digs function in JavaScript.