(discussion) proposal pr: optional arguments for functions

[WilcoSp]

based on issue #56

is*, diff* and most other functions that use the date function could 1 or more arguments be made optional to allow using the current time (now) without needing to create new Date().

currently this draft has only isAfter, isBefore and diffMilliseconds to give an example how it could look. I would like to first discuss which other functions could allow for optional arguments to use the current time ('now') and how

[vercel]

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[ghiscoding]

in JSDocs, an optional param should be wrapped in square bracket (see JSDocs). Also to be really aligned with JSDocs, the type should also be included and come before the param name, so it should be something like

* @param {DateInput} inputDate - The date that should be before the other one to return true
* @param {MaybeDateInput} [dateToCompare] - The date to compare with or `now` if nothing given

[WilcoSp]

yeah we could at use square brackets to indicate a param is optional. although we don't need to add types because we use typescript to provide the types