Using Javascript, how do I convert a binary string (1s and 0s) back into a Unicode character?

Question

I'm new here. Using Javascript, I have successfully converted a Unicode character into a binary string (i.e., into 1s and 0s). Now, how would I convert that string back into the original Unicode character (UTF-8 I think). I have found a few code examples--but unfortunately the conversions do not work in converting the binary string back into the original character.

Here's the binary string (which is a "thumbs up" emoji):

11110000100111111001000110001101

Thanks, and any code examples you could prove (in pure Javascript) would be most welcome. Thanks.

JosefZ · Accepted Answer · 2022-04-27 11:44:17Z

1

Basic Google-fu:

Putting above together (sorry for my poor JS skills):

function chunkSubstr(str, size) {
  const numChunks = Math.ceil(str.length / size)
  const chunks = new Array(numChunks)

  for (let i = 0, o = 0; i < numChunks; ++i, o += size) {
    chunks[i] = parseInt(str.substr(o, size),2)
  }

  return chunks
}
function uintToString(uintArray) {
    var encodedString = String.fromCharCode.apply(null, uintArray),
        decodedString = decodeURIComponent(escape(encodedString));
    return decodedString;
}

console.log(uintToString(chunkSubstr("11110000100111111001000110001101", 8))); // 👍

answered Apr 27, 2022 at 11:44

JosefZ

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2 Comments

The Floridude Over a year ago

Great answer; much appreciated. FYI: Code to initially convert a string to binary can be found here: stackoverflow.com/questions/55955730/…

JosefZ Over a year ago

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