Download the contents of a Javascript variable as a named file

Question

I have the contents of a file in a Javascript variable. When the user clicks something (link, button, etc.) I want the "save as" dialog to appear with a filename specified by my code and when the user clicks "save", the contents of the Javascript variable are saved in the file.

I know how to do this using server-side code but that is not an option for this application.

I've seen several conversations on StackOverflow related to this issue and the difficulties surrounding it so I'm placing a bounty on this one to encourage creative thinking :)

Can you elaborate on using HTML5 file access? I'm comfortable with the browser restrictions this might impose. — jasongullickson, Jun 30 '11 at 05:41
Correction: Apparently I have to wait two days to add a bounty, so I'll do so when we get there :) — jasongullickson, Jun 30 '11 at 05:42
http://stackoverflow.com/questions/2897619/using-html5-javascript-to-generate-and-save-a-file — mplungjan, Jun 30 '11 at 05:48
After 3 years, i can tell you solution can be found at http://stackoverflow.com/questions/24898044/is-possible-to-save-javascript-variable-as-file — andrea bidi, Mar 03 '15 at 08:30

score 1 · Answer 1 · edited May 23 '17 at 12:22

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Can't really say that this is my idea (I found it here of all places), but have you tried Downloadify? It will only work in the most modern browsers, but you don't really have a choice if you have no server-side component available.

edited May 23 '17 at 12:22

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answered Jun 30 '11 at 05:48

cwallenpoole

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I'll take a closer look at that but I'd prefer to avoid Flash if possible. – jasongullickson Jun 30 '11 at 05:56
@mplungjan I'll wager that both posts happened almost simultaneously. I got that link through Google. – cwallenpoole Jun 30 '11 at 06:08
As per usual. One has to be very fast here and I tend to lose rep by posting comments instead of answers – mplungjan Jun 30 '11 at 06:22

Download the contents of a Javascript variable as a named file

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