Type alias DateTimeFormatter

Type union of supported methods of defining a formatting behavior for DateTime TickStrategy.

1. Intl.DateTimeFormatOptions:

Use JavaScript API for formatting logic by supplying a Intl.DateTimeFormatOptions object. Example usage:

 // 'January 2015'
 { year: 'numeric', month: 'long' }

For complete documentation of valid keys and values, refer to https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DateTimeFormat

2. Custom formatting function:

Specify custom formatting logic by supplying a function that returns a string. Example usage:

 ( value, range ) => {
     // 'value' = number position of tick along the *Axis*.
     // 'range' = *FormattingRange* object that can be used to find the total range of the *Axis*, if needed.

     // Return *string*.
     return "any string"
 }

 ( value ) => {
     // JS *Date* API can be used to interpret numeric *Axis* positions as *UTC Date/Time*, exposing a multitude of handy methods.
     const date = new Date( value )
     return date.toLocaleTimeString()
 }

JS Date documentation: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date