text: var $def    = require('./$.def')
    , toIndex = require('./$.to-index')
    , fromCharCode = String.fromCharCode
    , $fromCodePoint = String.fromCodePoint;
  
  // length should be 1, old FF problem
  $def($def.S + $def.F * (!!$fromCodePoint && $fromCodePoint.length != 1), 'String', {
    // 21.1.2.2 String.fromCodePoint(...codePoints)
    fromCodePoint: function fromCodePoint(x){ // eslint-disable-line no-unused-vars
      var res = []
        , len = arguments.length
        , i   = 0
        , code;
      while(len > i){
        code = +arguments[i++];
        if(toIndex(code, 0x10ffff) !== code)throw RangeError(code + ' is not a valid code point');
        res.push(code < 0x10000
          ? fromCharCode(code)
          : fromCharCode(((code -= 0x10000) >> 10) + 0xd800, code % 0x400 + 0xdc00)
        );
      } return res.join('');
    }
  });