Assignment of clamped values to CSS variables

[joshuafredrickson]

Great plugin! I'm looking to incorporate it more fully into my workflow, but a major blocker is not being able to use fluid values in a CSS variable as this plugin only works with @apply rules.

It would be great, for example, to do the following:

--font-size-xl: theme('fontSize.fluid.xl'); // not exactly, but something similar 

Or, is there a way to access the clamped values programmatically for use inside tailwind.config.js, where one could assign custom, fluid fontSizes that are accessible via the theme function?