How to convert text to binary code in JavaScript?

Question

Text to Binary Code

I want JavaScript to translate text in a textarea into binary code.

For example, if a user types in "TEST

Answer 1

Just a hint into the right direction

var foo = "TEST",
    res = [ ];

foo.split('').forEach(function( letter ) {
    var bin     = letter.charCodeAt( 0 ).toString( 2 ),
        padding = 8 - bin.length;

    res.push( new Array( padding+1 ).join( '0' ) + bin );
});

console.log( res );

Answer 2

var PADDING = "00000000"

var string = "TEST"
var resultArray = []

for (var i = 0; i < string.length; i++) {
  var compact = string.charCodeAt(i).toString(2)
  var padded  = compact.substring(0, PADDING.length - compact.length) + compact

  resultArray.push(padded)
}

console.log(resultArray.join(" "))

Answer 3

What you should do is convert every char using charCodeAt function to get the Ascii Code in decimal. Then you can convert it to Binary value using toString(2):

HTML:

<input id="ti1" value ="TEST"/>
<input id="ti2"/>
<button onClick="convert();">Convert!</button>

JS:

function convert() {
  var output = document.getElementById("ti2");
  var input = document.getElementById("ti1").value;
  output.value = "";
  for (var i = 0; i < input.length; i++) {
      output.value += input[i].charCodeAt(0).toString(2) + " ";
  }
}

And here's a fiddle: http://jsfiddle.net/fA24Y/1/

Answer 4

Here's a pretty generic, native implementation, that I wrote some time ago,

// ABC - a generic, native JS (A)scii(B)inary(C)onverter.
// (c) 2013 Stephan Schmitz <eyecatchup@gmail.com>
// License: MIT, http://eyecatchup.mit-license.org
// URL: https://gist.github.com/eyecatchup/6742657
var ABC = {
  toAscii: function(bin) {
    return bin.replace(/\s*[01]{8}\s*/g, function(bin) {
      return String.fromCharCode(parseInt(bin, 2))
    })
  },
  toBinary: function(str, spaceSeparatedOctets) {
    return str.replace(/[\s\S]/g, function(str) {
      str = ABC.zeroPad(str.charCodeAt().toString(2));
      return !1 == spaceSeparatedOctets ? str : str + " "
    })
  },
  zeroPad: function(num) {
    return "00000000".slice(String(num).length) + num
  }
};

and to be used as follows:

var binary1      = "01100110011001010110010101101100011010010110111001100111001000000110110001110101011000110110101101111001",
    binary2      = "01100110 01100101 01100101 01101100 01101001 01101110 01100111 00100000 01101100 01110101 01100011 01101011 01111001",
    binary1Ascii = ABC.toAscii(binary1),
    binary2Ascii = ABC.toAscii(binary2);

console.log("Binary 1:                   " + binary1);
console.log("Binary 1 to ASCII:          " + binary1Ascii);
console.log("Binary 2:                   " + binary2);
console.log("Binary 2 to ASCII:          " + binary2Ascii);
console.log("Ascii to Binary:            " + ABC.toBinary(binary1Ascii));     // default: space-separated octets
console.log("Ascii to Binary /wo spaces: " + ABC.toBinary(binary1Ascii, 0));  // 2nd parameter false to not space-separate octets

Source is on Github (gist): https://gist.github.com/eyecatchup/6742657

Hope it helps. Feel free to use for whatever you want (well, at least for whatever MIT permits).

Answer 5

This might be the simplest you can get:

function text2Binary(string) {
    return string.split('').map(function (char) {
        return char.charCodeAt(0).toString(2);
    }).join(' ');
}

Answer 6

this seems to be the simplified version

Array.from('abc').map((each)=>each.charCodeAt(0).toString(2)).join(" ")