Re: [encoding] UTf7 supports (#16)

I think this should be closed as "won't fix", because this is a Web-oriented spec and not an email-oriented spec.

It does follow that if you are implementing an email client that performs MIME decoding in JavaScript running on a browser engine, you have to implement an UTF-7 decoder in JS instead of calling into a browser-provided facility like `TextDecoder`. That's somewhat unfortunate, but the alternative would be speccing UTF-7 as a special encoding that's exposed only via `TextDecoder` and not in other places where the Web Platform exposes decoder.

But then, JS email app developers need to implement the IMAP variant of UTF-7 in JS anyway. (Unless you are arguing that the spec should support that encoding, too, and even on the `TextEncoder` side.)

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Reply to this email directly or view it on GitHub:
https://github.com/whatwg/encoding/issues/16#issuecomment-156807304