node_modules/core-js/library/modules/es6.string.from-code-point.js


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var $export        = require('./_export')
  , toIndex        = require('./_to-index')
  , fromCharCode   = String.fromCharCode
  , $fromCodePoint = String.fromCodePoint;

// length should be 1, old FF problem
$export($export.S + $export.F * (!!$fromCodePoint && $fromCodePoint.length != 1), 'String', {
  // 21.1.2.2 String.fromCodePoint(...codePoints)
  fromCodePoint: function fromCodePoint(x){ // eslint-disable-line no-unused-vars
    var res  = []
      , aLen = arguments.length
      , i    = 0
      , code;
    while(aLen > 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('');
  }
});