javascript - close window after download file generates -

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i have javascript code generate pdf file. have url generates pdf file. dont want user see url thats why using iframe in hidden load url , generate download popup. working me, want open iframe content in new tab, wait till download popup generate , close window.

see javascript,

var iframe; var url="test.com?file=download"; iframe="<iframe src='"+url+"' style='visibility:hidden' >";  var html="<html>";         html+="<head>";         html+="</head>";         html+="<body>";         html+= iframe;         html+="</body>";         html+="</html>";         var printwin = window.open('','_blank','left=0,top=0,fullscreen,toolbar=0,scrollbars=1,status=0');         printwin.document.write(html);         printwin.document.close();         printwin.focus();

if using printwin.close(); sudden close window without download file. there solution this?

if may suggest alternative solution without using hidden iframes , opening / closing tabs. in html5 can use attribute on link called download. sample code using purely js be:

// select download button var btn = document.getelementbyid('download-btn-id');     // url pdf,     // result of code have running in iframe.     btn.href = url;     // name file , add .pdf extension.     btn.download = 'filename.pdf';

when user clicks on button, pdf downloaded without leaving page.

if need trigger download @ runtime, can add line acts if user clicked on download button, result pdf downloaded when run function.

btn.click();

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