Default (scale) formatter

[peteruithoven]

I'm currently customizing the formatter option in 3 places:

• Y scale ticks (options.scales.y.ticks.callback)
• Tooltip value
• Data labels

Isn't there a way to set the default (numeric) formatter in one place?

Chart.defaults.formatter = ...

Like we can set chart.defaults.font for example:
https://www.chartjs.org/docs/latest/api/interfaces/Defaults.html#font

Or related for formatting we can set the default locale:
https://www.chartjs.org/docs/latest/api/interfaces/Defaults.html#locale

We can configure defaults per scale, but not it's general formatting:
https://www.chartjs.org/docs/latest/api/interfaces/Defaults.html#scales

The Linear Axis specific tick options > format option comes close, but is limited to ticks and the use of Intl.NumberFormat.
https://www.chartjs.org/docs/latest/axes/cartesian/linear.html#linear-axis-specific-tick-options

Maybe one default formatter doesn't make sense, since it probably depend on the scale type.
Why not a formatter per scale type, something I could set for the linear scale like:

Chart.defaults.scales.linear.formatter = ...

Or/and also have the format: NumberFormatOptions option, which is available for the ticks config, available for the scale in general.

Chart.defaults.scales.linear.format = ...