Defining the font size in diffent units than 'px'

Currently, the defult unit in Chart.js is ‘px’, and if I set ‘rem’ after a value in both defaultFontSize or fontSize (inside options), no text appears.

I would like to know if it is possible to change the default unit (px) to another (rem, in my case).

[JohnArcher]

Any chance that this will be implemented (in v3)? I need the same (pt in my case).

[MichaelBrauner]

I use this function to scale my font size down, when on mobile:

static getRelationalFontSize(mobileBreakpoint = 1920, baseFontSize = 28) {

    return window.innerWidth <= mobileBreakpoint
      ? baseFontSize * window.innerWidth / mobileBreakpoint
      : baseFontSize

  }