--- /dev/null
+// Based on:
+// http://norbertlindenberg.com/2012/05/ecmascript-supplementary-characters/
+// and:
+// https://github.com/mathiasbynens/String.fromCodePoint/blob/master
+// /fromcodepoint.js
+
+'use strict';
+
+var floor = Math.floor, fromCharCode = String.fromCharCode;
+
+module.exports = function (codePoint/*, …codePoints*/) {
+ var chars = [], l = arguments.length, i, c, result = '';
+ for (i = 0; i < l; ++i) {
+ c = Number(arguments[i]);
+ if (!isFinite(c) || c < 0 || c > 0x10FFFF || floor(c) !== c) {
+ throw new RangeError("Invalid code point " + c);
+ }
+
+ if (c < 0x10000) {
+ chars.push(c);
+ } else {
+ c -= 0x10000;
+ chars.push((c >> 10) + 0xD800, (c % 0x400) + 0xDC00);
+ }
+ if (i + 1 !== l && chars.length <= 0x4000) continue;
+ result += fromCharCode.apply(null, chars);
+ chars.length = 0;
+ }
+ return result;
+};