Crossbrowser file download

download.js

var BrowserDetect =
{
  init: function () {
    this.browser = this.searchString(this.dataBrowser) || 'Other';
    this.version = this.searchVersion(navigator.userAgent) || this.searchVersion(navigator.appVersion) || 'Unknown';
  },

  searchString: function (data) {
    for (var i = 0; i < data.length; i++) {
      var dataString = data[i].string;
      this.versionSearchString = data[i].subString;

      if (dataString.indexOf(data[i].subString) != -1) {
        return data[i].identity;
      }
    }
  },

  searchVersion: function (dataString) {
    var index = dataString.indexOf(this.versionSearchString);
    if (index == -1) return;
    return parseFloat(dataString.substring(index + this.versionSearchString.length + 1));
  },

  dataBrowser: [
    {string: navigator.userAgent, subString: 'Chrome', identity: 'Chrome'},
    {string: navigator.userAgent, subString: 'MSIE', identity: 'Explorer'},
    {string: navigator.userAgent, subString: 'Firefox', identity: 'Firefox'},
    {string: navigator.userAgent, subString: 'Safari', identity: 'Safari'},
    {string: navigator.userAgent, subString: 'Opera', identity: 'Opera'}
  ]

};
if (global) BrowserDetect.init();


export function downloadFile(sUrl) {
  //iOS devices do not support downloading. We have to inform user about this.
  if (/(iP)/g.test(navigator.userAgent)) {
    alert('Your device does not support files downloading. Please try again in desktop browser.');
    return false;
  }
  //If in Chrome or Safari - download via virtual link click
  if (BrowserDetect.browser == 'Chrome' || BrowserDetect.browser == 'Safari') {
    //Creating new link node.
    var link = document.createElement('a');
    link.href = sUrl;

    if (link.download !== undefined) {
      //Set HTML5 download attribute. This will prevent file from opening if supported.
      var fileName = sUrl.substring(sUrl.lastIndexOf('/') + 1, sUrl.length);
      link.download = fileName;
    }
    //Dispatching click event.
    if (document.createEvent) {
      var e = document.createEvent('MouseEvents');
      e.initEvent('click', true, true);
      link.dispatchEvent(e);
      return true;
    }
  }

  // Force file download (whether supported by server).
  var query = '?download';
  global.open(sUrl + query, '_self');
  return true;
}