Added reportNS function to I18NextProvider to report used namespaces

[olivierpascal]

Related to #499

[coveralls]

Coverage increased (+0.3%) to 82.937% when pulling d398635 on olivierpascal:reportNS into 2d2ec21 on i18next:master.

[coveralls]

Coverage increased (+0.3%) to 82.937% when pulling d398635 on olivierpascal:reportNS into 2d2ec21 on i18next:master.

[jamuhl]

Looks good...would you also be able to extend the documentation?!?:

-> https://react.i18next.com/components/i18nextprovider#the-i-18-nextprovider-props (add the new prop)
-> https://react.i18next.com/misc/serverside-rendering add a small sample (like in your issue description to show how to use this new feature)

[olivierpascal]

Sure!

[jamuhl]

thanks again

published in react-i18next@7.11.0

[tutok]

it looks like namespace reported by reportNS is undefined when no namespace is specified and fallback rule is executed. For example when I use translate HOC in that way: translate()(Home);

[olivierpascal]

Maybe you can create an issue (please tag me) and use something like yourArray.filter(Boolean) until a fix is available?