Formatter nextFormatter arg type issue

[dobesv]

Hi,

The Formatter type is defined as follows:

export type Formatter = (
  value: number,
  unit: Unit,
  suffix: Suffix,
  epochMilliseconds: number,
  nextFormatter: Formatter,
  now: () => number,
) => React.ReactNode

Note how the nextFormatter and now parameters are required arguments to Formatter and nextFormatter is declared as a Formatter.

According to the docs and the code, nextFormatter actually takes all the options as optional and will use the prior values if none is provided (or undefined). So the type should be something like:

export type NextFormatter = (
  value?: number,
  unit?: Unit,
  suffix?: Suffix,
  epochMilliseconds?: number,
  nextFormatter?: Formatter,
  now?: () => number,
) => React.ReactNode;

export type Formatter = (
  value: number,
  unit: Unit,
  suffix: Suffix,
  epochMilliseconds: number,
  nextFormatter: NextFormatter,
  now: () => number,
) => React.ReactNode;

[dobesv]

Workaround: when calling nextFormatter, just pass through all the args (including passing the same value of nextFormatter).