bundling custom .js files

[Shandelier]

Why the pnpm run dev command doesn't use rollup to bundle custom .js files added to the project?

If this is intended behaviour (not bundling in dev mode), how can I use my custom ~/options/custom.js file in options.html in dev mode?

I confirmed that build:prod work as expected (bundling).

EDIT: My problem is when i open Options in chrome extension in the console i'm getting this error:
"GET chrome-extension://omhjadppniapnjfeehfigoillobaapek/options/custom.js net::ERR_FILE_NOT_FOUND"
because it's not present in dev folder

[Shandelier]

the projects use tsup for bundling so rollup is not needed, but I still can't use code from custom.js file inside options.html

[Shandelier]

can't find a way of bundling with js files. As a workaround i use .ts files with .js code