document.body can be null when setLocale is first called

[rawnsley]

A common, but non-deterministic, console error is being thrown in setLocale because document.body can be null.

It should be safe to skip raising the event with ?. in this situation because at best it was throwing an exception before.

A common pattern elsewhere in the codebase is to hang these events off window (which is guaranteed to be non-null) rather than document.body, and that would appear to be preferable in this case as well, but there may be something special about events on the document.body that I'm missing.

[netpro2k]

Hmm a quick check of how we are using locale-updated seems like its not particularly important where the event is coming from. I think your suggestion to use window would work, and I would prefer that over silently failing which might happen with how the PR is currently implemented.

[rawnsley]

Reimplemented as suggested by @netpro2k

[netpro2k]

Merged. Thanks for making these additional changes!