Extraction of used Class Names for Later processing

[Hecatron]

Hi,
I'm currently in the process of trying to write some Blazor (Csharp) / Leptos (Rust) component libraries using tailwind.
Ideally what I'd like is a feature that can be used to just generate a list of detected tailwind class names without generating the full css
Currently there's a way to do this using tailwindcss-mangle's extract mode
But I was wondering if there was a more "native" method to do this under Tailwind 4 using an API or built in feature

The reason for wanting this feature is situations where there are multiple native libraries (non js) that use tailwind
but the actual tailwind css and theme is generated in the final consuming project.
So for example

1. Razor class library that contains buttons, using tailwind to style the buttons
   A tool or script extracts the used tailwind classes into a text file bundled with the library

2. Razor class library that contains something else, lets say badges, using tailwind to style the badges
   A tool or script extracts the used tailwind classes into a text file bundled with the library

3. Final consuming project which contains both of the above via csproj references.
   The generated text files from each of the libraries is included into the build directory
   Tailwind is used to generate any css needed along with customising the theme
   it also picks up on the text files bundled in from the referenced projects so also generates css for those libraries at the same time.

I've had a dig around for similar questions but there's a lot in the discussions section

[wongjn]

You can use Scanner from @tailwindcss/oxide to scan files for class name candidates like:

tailwindcss/packages/@tailwindcss-cli/src/commands/build/index.ts

Line 314 in 7971167

let candidates = scanner.scan()

Then, I think you might need to verify which of these candidates would be Tailwind class names. If you do, then perhaps this logic is somewhere in compiler.build(). For example, used here:

tailwindcss/packages/@tailwindcss-cli/src/commands/build/index.ts

Line 331 in 7971167

compiledCss = compiler.build(candidates)

Defined here:

tailwindcss/packages/tailwindcss/src/index.ts

Lines 836 to 847 in 7971167

	build(newCandidates) {
	let newAst = api.build(newCandidates)
	if (newAst === compiledAst) {
	return compiledCss
	}
	compiledCss = toCss(newAst, !!opts.from)
	compiledAst = newAst
	return compiledCss
	},

[Hecatron]

Thats interesting thanks