Creating download prompt using purely javascript

Question

I have some text data (say var a = \'Hello World From Javascript\';)in javascript variable in current window. I want to do the following through javascript-

Answer 1

Triggering a file download without any server request

Unfortunately this is not something you can do with normal browser capabilities. Something like flash or a browser-specific plugin will get you what you need, but security limitations within javascript will not let you download arbitrary data created within the browser.

Also the 'data' url is not supported across all browser/version combinations. I am not sure if your users are constrained on what browser they are using or not but that may limit what you can do with that solution.

Source: Triggering a file download without any server request