RESOLVED DUPLICATE of bug 158576 55663
Implement btoa and atob functions in Web Workers 
https://bugs.webkit.org/show_bug.cgi?id=55663
Summary Implement btoa and atob functions in Web Workers
Jon Leighton
Reported 2011-03-03 04:40:54 PST
Firefox supports btoa() and atob() functions within workers, which do the same thing as window.btoa() and window.atob() in the DOM. It would be great if these were available in WebKit too.
Attachments
Add attachment proposed patch, testcase, etc.
Alexey Proskuryakov
Comment 1 2011-03-03 14:38:58 PST
Could you please provide some use cases for using these functions in workers?
Jon Leighton
Comment 2 2011-03-03 15:07:18 PST
In a project I was working on I was downloading image data via XHR in a Web Worker and then encoding it into a data: URI. (I say 'was' because I have since stopped doing it in a worker, for separate reasons, but there you go...) I could imagine you might have, for example, a web-based email client which might want to encode a multipart message before sending it, all the background in a worker.
Eric
Comment 3 2012-08-17 15:33:22 PDT
My use case is similar. I'm using GIFEncoder (https://github.com/antimatter15/jsgif/blob/master/GIFEncoder.js), in a worker to produce a data URL from of the encoded gif. GIFEncoder implements it's own encode64() method: https://github.com/antimatter15/jsgif/blob/master/Demos/b64.js
popecode
Comment 4 2013-09-23 21:15:31 PDT
I wrote a frame buffer to handle image downloads from a worker thread. For my application, this is necessary as the main thread is handling a video and an animation and performance is critical. To use the downloaded images in the browser, I first have to convert them via btoa(). Using firefox, I can perform this conversion before passing the data to the main thread. Since chrome does not allow this, Firefox runs significantly faster than Chrome in my case.
Dmitry Chestnykh
Comment 5 2014-12-13 06:13:57 PST
Is there any progress on this? I use atob/btoa for base64 encoding in TweetNaCl-js instead of implementing my own routines, and I'd like them to be available from web workers. FIY, both Firefox and Chrome have them. Thanks!
Mathias Bynens
Comment 6 2014-12-13 09:23:06 PST
@Dmitry, as a workaround you can use a fully `btoa`/`atob`-compatible polyfill like https://github.com/mathiasbynens/base64.
Chris Dumez
Comment 7 2016-06-09 15:44:09 PDT
*** This bug has been marked as a duplicate of bug 158576 ***
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