text: function encodeAndDecodeMessages() {
      //Select BTN
      const [encode, decode] = document.querySelectorAll('button');
      const [input, output] = document.querySelectorAll('textarea');
  
      //Add EventListener
      encode.addEventListener('click', onEncode);
      decode.addEventListener('click', onDencode);
  
      function onEncode() {
          const encode = input.value
              .split('')
              .map((ch) => ch.charCodeAt())
              .map((ch) => String.fromCharCode(ch + 1))
              .join('');
  
          input.value = '';
          output.value = encode;
      };
  
      function onDencode() {
          const decode = output.value
              .split('')
              .map((ch) => ch.charCodeAt())
              .map((ch) => String.fromCharCode(ch - 1))
              .join('');
          output.value = decode;
      };
  }