1047187 - Support for non-nullable property in WebIDL Event dictionary

Status: RESOLVED INVALID

(Core :: DOM: Core & HTML, defect)

Description

[Yoshi Cheng-Hao Huang [:allstars.chh][:allstarschh][:yoshi]]

When I tried to implement MozNFCPeerEvent for NFC in Bug 1046554, I'd like to make the 'peer' property non-nullable, however met compilation error in [1],
and the reason for why this 'peer' shouldn't be nullable is this event (MozNFCPeerEvent) is fired when another MozNFCPeer is detected, so the 'peer' should be a valid MozNFCPeer object, and shouldn't be null.

Also W3C NFC API has defined this NFCPeerEvent with non-nullable 'peer' property, see [2].

After consulting smaug, he said we should file a bug for this.


[1]: https://bugzilla.mozilla.org/show_bug.cgi?id=1046554#c4
[2]: http://w3c.github.io/nfc/proposals/common/nfc.html#nfcpeerevent-interface

Comment 1

[Boris Zbarsky [:bzbarsky]]

The W3C API as written doesn't seem to me like it would pass TAG review: it has no constructor for the event...

Given that we _do_ apparently want to have a constructor, what is its expected behavior when the passed-in dictionary doesn't have a "peer" property?

Comment 2

[Olli Pettay [:smaug][[e-mail]]]

I meant you should file a spec bug about this, sorry about not being clear about.