function dec2Bin(dec)

{

    if(dec >= 0) {

        return dec.toString(2);

    }

    else {

        /* Here you could represent the number in 2s compliment but this is not what 

           JS uses as its not sure how many bits are in your number range. There are 

           some suggestions https://stackoverflow.com/questions/10936600/javascript-decimal-to-binary-64-bit 

        */

        return (~dec).toString(2);

    }

}

​

function binaryAgent(str) {

  const arr = str.split(" ");

  let ans = "";

  for (let item of arr) {

    const char = String.fromCharCode(parseInt(item, 2))

    ans = ans + char;

  }

  console.log(ans)

  return ans;

}

function binaryAgent(str) {

  const bytes = str.split(' ')

  let output = ''

  for (let k = 0; k < bytes.length; k++){

      output += String.fromCharCode(parseInt(bytes[k], 2))

  }

  return output

}

​

binaryAgent("01000001 01110010 01100101 01101110 00100111 01110100 00100000 01100010 01101111 01101110 01100110 01101001 01110010 01100101 01110011 00100000 01100110 01110101 01101110 00100001 00111111");