format
Formats a value and a unit according to the locale and formatting options of the given Intl.RelativeTimeFormat object.
While this method automatically provides the correct plural forms, the grammatical form is otherwise as neutral as possible.
It is the caller's responsibility to handle cut-off logic such as deciding between displaying "in 7 days" or "in 1 week". This API does not support relative dates involving compound units. e.g "in 5 days and 4 hours".
Parameters
value
Numeric value to use in the internationalized relative time message
unit
Unit to use in the relative time internationalized message.
Throws
RangeError if unit was given something other than unit possible values