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var url = 'https://github.com/ringohub';
var req = new XMLHttpRequest();
req.open('GET', url);
req.onreadystatechange = function () {
    switch (req.readyState) {
      case 0:
        console.log('UNSENT');
        break;
      case 1:
        console.log('OPEND');
        break;
      case 2:
        console.log('HEADERS_RECEIVED');
        break;
      case 3:
        console.log('LOADING');
        break;
      case 4:
        console.log('DONE');
        console.log(`Status:${req.status}`);
        console.log(req.responseText);
        break;
    }
};
req.send(null);