Add language autodetection strategy based on <html lang>
#115
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Ref #114 .
First, internal value of
_config.auto_language
is now normalized to be either:browser
(will use_getBrowserLang()
) - alsotrue
is classified asbrowser
, to keep backward compatibilitydocument
(will usedocument.documentElement.lang
)null
(disable auto detection), which is default in all other cases (includingfalse
for backward compatibility). I choosenull
over false to be more type strict - now the value of auto_language is basically nullable string.After this, the
current_lang
is determined. I also refactored this to be in a separate method.