TypeScript: can't pass default value to "t" as second argument

[maksis]

Using t('key', 'Default value') (as documented in https://www.i18next.com/translation-function/essentials#passing-a-default-value) currently causes the following error:

Argument of type '"Default value"' is not assignable to parameter of type 'TOptions<object> | undefined'.

I'm using version 14.1.1

[rosskevin]

@jamuhl are the docs wrong? I see defaultValue as a key in the options, so ts would allow:

i18next.t('key', {defaultValue: 'default value to show'});

but not:

i18next.t('key', 'default value to show');

[rosskevin]

I don't spot the case where the string defaultValue as a second arg is allowed/tested in https://github.com/i18next/i18next/blob/master/test/translator/translator.translate.defaultValue.spec.js

[jamuhl]

both is allowed...having second function argument a string it's used as defaultValue using https://github.com/i18next/i18next/blob/master/src/Translator.js#L66

which defaults to https://github.com/i18next/i18next/blob/master/src/defaults.js#L39

[jamuhl]

new tests do not yet cover all cases - that's the reason why we run the old compatibility tests...