Create and download a file in javascript

Phew, I spent a lot of time to get this to work:

  • Create a text based file in javascript – a simple csv or txt
  • Download a file in Chrome and Internet Explorer
  • Make Excel understand Unicode characters (å ä ö and many more) in csv directly.

I found many solutions on the Internet that I used to find out a solution that works for me

A deep diving jsfiddle about unicode encodings, bom, line endings: (unfortunately, does not work in IE). There I learned one important thing: we need a BOM in order to make Excel understand that it is not just ASCII. The BOM (byte order mark) for utf-8 is %ef%bb%bf for utf-8. Without this bom you’ll see the right characters in a text editor (except Notepad of course), but if you open the csv file directly in Excel, you’ll see wrong letters.
Other good resources are FileSaver.js: and download.js:

This is my solution that is tested in Chrome and IE10:


Unfortunately in Safari, the link is opened directly in the web browser. You have to press Cmd – S to trigger Save As manually.

Part of SharePoint Utilities

I submitted this code to sputils (SharePoint Utilities) on github.


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