I’m working on WOPI app. I created WOPI host page and execute this endpoint:

/wv/WordViewer/request.pdf?WOPISrc={WopiUrl}&type=downloadpdf

that download file (convert .docx to .pdf and download).
After successful downloading I want to close browser tab.

I just hardcoded this way:

var o = document.getElementsByTagName('iframe')[0];
var iframeDoc = o.contentWindow.document;

checkIframeLoaded();

function checkIframeLoaded() {
    console.log(iframeDoc.readyState);
    if (iframeDoc.readyState == 'complete') {
        window.close();
    } else {
        setTimeout(checkIframeLoaded, 1000);
    }
}

But it isn’t what I want, it closes the tab after DOMContentLoaded success but .pdf document wasn’t downloaded

Maybe there is a way to catch all requests are completed or something else? I just need to check somehow that /wv/WordViewer/request.pdf?WOPISrc={WopiUrl}&type=downloadpdf successfully completed.