recursive-reverse.js

const list = ['m', 'c', 'k', 'o', 'm', 'o']

const reverse = (list) => {
  if (list.length == 0) return [];

  let first = list.splice(0, 1);

  return reverse(list).concat(first);
}

let result = reverse(list);

console.log(result);
// [ 'o', 'm', 'o', 'k', 'c', 'm' ]