Create SHA256 Hash in IE and Chrome (others not tested)

gistfile1.txt

function convertArrayBufferToHexaDecimal(buffer) {
  var data_view = new DataView(buffer);
  var iii, len, hex = "", c;

  for ((iii = 0), (len = data_view.byteLength); iii < len; iii += 1) {
    c = data_view.getUint8(iii).toString(16);
    if (c.length < 2) c = "0" + c;

    hex += c;
  }

  return hex;
}

function convertStringToArrayBufferView(str) {
  var bytes = new Uint8Array(str.length);
  for (var iii = 0; iii < str.length; iii++)
    bytes[iii] = str.charCodeAt(iii);
  return bytes;
}

function crypt(data) {
  var crypto = window.crypto || window.msCrypto;

  if (crypto.subtle) {
    console.log("Cryptography API Supported");

    var crypt = crypto.subtle.digest(
      { name: "SHA-256" },
      convertStringToArrayBufferView(data)
    );

    if (typeof crypt.then == "function") {
      crypt.then(function(result) {
        result = convertArrayBufferToHexaDecimal(result);
        console.log("hashed");
        console.log(result);
      });
    } else {
      var result = convertArrayBufferToHexaDecimal(crypt.result);
      console.log("hashed");
      console.log(result);
    }
  } else {
    console.log("Cryptography API not Supported");
  }
};

crypt("supersavetohash");