Can't download Blob from a Trusted Site in IE11

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A customer using Internet Explorer 11 has issues downloading files from our website.

They have File Downloads disabled for the Internet Zone, File Downloads enabled for Trusted Sites and our website is added to their Trusted Sites.

The following is a quick and dirty example of what we are doing in a function to download files on the client side (we use file-saver in real life). This works fine with file downloads enabled for the Internet Zone.

var content = "Hello world";
var filename = "hello.txt";
var blob = new Blob([content], { type: "text/plain" });
window.navigator.msSaveOrOpenBlob(blob, filename);

The error they are getting is

hello.txt couldn't be downloaded

We tried everything we can think of and pretty much ran out of ideas. Is this scenario supported? Any ideas of what might be wrong?

Thanks!

internet-explorer-11 blob javascript
1 Answers

Try add blob to the trusted site, it works for me.

i.e. On internet Explorer, go to tools, then internet option, under security tab, click on trusted site, then click on the sites button and add 'blob' as a trusted site

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