I use javascript to generate a file and download. It seems that depending on the version of chrome, the download file names can be auto renamed to 'download'. is there a way to avoid it?

this is my code:

var link = document.createElement("a");
link.setAttribute("href", 'data:application/octet-stream,' + 'file content here');
link.setAttribute("download", 'file1.txt');

link.click();

This is not a duplicated question because i am using the latest chrome and the previously suggested hyperlink is exactly what i am using. I think chrome v34 works fine. but once my chrome autoupdated to v35, it went back to 'download' file name.