Interpreting Unicode values and writing them to a string to render the corresponding Emoji

unicode-interpretation.js

// Based on this amazing article:
// http://crocodillon.com/blog/parsing-emoji-unicode-in-javascript

function findSurrogatePair(point) {
    var offset = point - 0x10000,
        lead = 0xd800 + (offset >> 10),
        trail = 0xdc00 + (offset & 0x3ff);

    return [lead.toString(16), trail.toString(16)];
}

var WOMAN_KISS_WOMAN_UNICODE_VALUES = "1F469-200D-2764-FE0F-200D-1F48B-200D-1F469";

var output = WOMAN_KISS_WOMAN_UNICODE_VALUES.split('-').map(function(codepoint) {
    codepoint = parseInt(codepoint, 16);

    if (codepoint <= 0xffff) {
        return String.fromCharCode(codepoint);
    } else {
        return findSurrogatePair(codepoint).reduce(function(string, surrogate) {
            return string + String.fromCharCode(parseInt(surrogate, 16));
        }, '');
    }
}).join('');

console.log(output);