How to communicate with WASM plugin?

[dominictobias]

Hi, if a transform plugin builds up e.g. an object of CSS which should then be output as CSS to a file (i.e. compile time CSS-in-JS), how does the main SWC program and the WASM module communicate that? Similarly if the plugin is used in another system e.g. Vite (via let's say @vitejs/plugin-react-swc)? Thanks