Download a file using JavaScript

download.js

// Download a PDF
var fileName = 'My file';
var fileURL = 'http://localhost/my-file.pdf';

// Non-IE
if (!window.ActiveXObject) {
  var save = document.createElement('a');
	save.href = fileURL;
	save.target = '_blank';
	save.download = fileName || 'unknown';

	// IE 11
	try {
	  var evt = new MouseEvent('click', {
		  'view': window,
			'bubbles': true,
			'cancelable': false
	  });
		save.dispatchEvent(evt);
	} catch (e) {
		window.open(fileURL, fileName);
	}

	(window.URL || window.webkitURL).revokeObjectURL(save.href);

// IE < 11
} else if ( !! window.ActiveXObject && document.execCommand)     {
	var _window = window.open(fileURL, '_blank');
	_window.document.close();
	_window.document.execCommand('SaveAs', true, fileName || fileURL)
	_window.close();
}