JSFiddle - React, Tailwind, and code Playground

by Eugen Sunic

JavaScript

function nesto(value) {

  return value === value.split('').reduce((acc, x, i) => acc + value[value.length - 1 - i], '')

}

function nesto1(value) {
  if (!value) {
    return value;
  }
  return nesto1(value.substring(0 + 1)) + value.charAt(0);
}

console.log(nesto1('121'))