Function corsEnabled

DownloadAllContent/DownloadAllContent.user.js:104–114

(url)

  }

  function corsEnabled(url) {
    var xhr = new XMLHttpRequest();

    xhr.open('HEAD', url, false);

    try {
      xhr.send();
    } catch (e) {}

    return xhr.status >= 200 && xhr.status <= 299;
  }


  function click(node) {