Re: [ambient light events LC] Feedback

On Tue, Dec 18, 2012 at 11:19 AM, Boris Zbarsky <bzbarsky@mit.edu> wrote:
> On 12/18/12 10:47 AM, Tab Atkins Jr. wrote:
>> Makes sense, I guess (though I'm not super happy with having to
>> explicitly add the empty string to every enum that's supposed to be
>> "nullable").  In that case, the IDL would be:
>>
>> enum LightLevel { "dim", "normal", "bright", "" };
>> [Constructor (DOMString type, optional LightLevelEventInit eventInitDict)]
>> interface LightLevelEvent : Event {
>>      readonly attribute LightLevel value;
>> };
>> dictionary LightLevelEventInit : EventInit {
>>      LightLevel value = "";
>> };
>
>
> If you really want it nullable, why not make it nullable?  As in:
>
>   dictionary LightLevelEventInit : EventInit {
>       LightLevel? value = null;
>   };
>
> This would incidentally work a lot better with { value: undefined } than the
> proposal above...
>
> What am I missing?

Anne pointed out in IRC that, when all the other values are strings,
it is somewhat more convenient to have the "no value" value be a
string as well, and the empty string is the obvious choice for that
role.

~TJ