umoji/dist/umoji.esm.js

var emojiToUnicode = function (emoji) {
  var backStr = "";
  if(emoji&&emoji.length>0){
    for(var char of emoji){
      var index =  char.codePointAt(0);
      if(index>65535){
        var h = '\\u'+(Math.floor((index - 0x10000) / 0x400) + 0xD800).toString(16);
        var c = '\\u'+((index - 0x10000) % 0x400 + 0xDC00).toString(16);
        backStr = backStr + h + c;
      }else{
        backStr = backStr + char;
      }
    }
    console.log(backStr);
  }
  return backStr
};

var toSurrogatePairs = function (index) {
  var h = '\\u'+(Math.floor((index - 0x10000) / 0x400) + 0xD800).toString(16);
  var c = '\\u'+((index - 0x10000) % 0x400 + 0xDC00).toString(16);
  console.log(h+c);
  return h+c
};

/*! https://mths.be/fromcodepoint v0.2.1 by @mathias */
var fromcodepoint = function () {
  var stringFromCharCode = String.fromCharCode;
  var floor = Math.floor;
  var fromCodePoint = function(_) {
    var MAX_SIZE = 0x4000;
    var codeUnits = [];
    var highSurrogate;
    var lowSurrogate;
    var index = -1;
    var length = arguments.length;
    if (!length) {
      return '';
    }
    var result = '';
    while (++index < length) {
      var codePoint = Number(arguments[index]);
      if (
        !isFinite(codePoint) || // `NaN`, `+Infinity`, or `-Infinity`
        codePoint < 0 || // not a valid Unicode code point
        codePoint > 0x10FFFF || // not a valid Unicode code point
        floor(codePoint) != codePoint // not an integer
      ) {
        throw RangeError('Invalid code point: ' + codePoint);
      }
      if (codePoint <= 0xFFFF) { // BMP code point
        codeUnits.push(codePoint);
      } else { // Astral code point; split in surrogate halves
        // https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
        codePoint -= 0x10000;
        highSurrogate = (codePoint >> 10) + 0xD800;
        lowSurrogate = (codePoint % 0x400) + 0xDC00;
        codeUnits.push(highSurrogate, lowSurrogate);
      }
      if (index + 1 == length || codeUnits.length > MAX_SIZE) {
        result += stringFromCharCode.apply(null, codeUnits);
        codeUnits.length = 0;
      }
    }
    return result;
  };
  String.prototype.fromCodePoint = fromCodePoint;
};

var umoji = {
  emojiToUnicode:emojiToUnicode,
  toSurrogatePairs:toSurrogatePairs,
  fromcodepoint:fromcodepoint
};
var umoji_1 = umoji;

export default umoji_1;