Clipboard API SVG support

[dway123]

Request for Mozilla Position on an Emerging Web Specification

• Base Specification Title: Clipboard API and events
• Specification or proposal URL: Explainer at https://docs.google.com/document/d/1Rx7gi01avpRRNYKSpp3U4WQdjery0H0IkX2XxDtfZ8I/edit
• Caniuse.com URL (optional):
• Bugzilla URL (optional):
• Mozillians who can provide input (optional):

Other information

• https://www.chromestatus.com/feature/5125790490427392 has more links
• Explicitly define supported MIME types in Async Clipboard Spec w3c/editing#305 may be relevant

[annevk]

Now that https://wicg.github.io/sanitizer-api/ is further along, sanitization might no longer be that hard to actually define?

cc @evilpie @mozfreddyb

[annevk]

@dway123 also, where are the details defined for navigator.clipboard.write()? Would you allow any arbitrary byte sequence to be tagged as image/svg+xml or does it have to conform to some set of rules?

[dway123]

I think the current Chromium implementation allows for any arbitrary byte sequence to be tagged as image/svg+xml (like with HTML/image/text implementations), but then sanitizes the content as if it's SVG. This seems consistent with the navigator.clipboard.write() spec, which doesn't require item to conform to some set of rules.

@mkruisselbrink for more comment, as I'm no longer active on Chromium now. (Thanks for all the collaboration and questions on clipboard, @annevk)