Is there any way to build custom js files?

import { defineNuxtModule } from 'nuxt/kit'
import { type LibraryOptions, build } from 'vite'
import { unocss } from 'config/uno'

export default defineNuxtModule<LibraryOptions>({
  meta: {
    name: 'lib',
    configKey: 'lib'
  },

  setup(lib, nuxt) {
    if (!lib || !lib.entry)
      return

    const libDir = `${nuxt.options.buildDir}/libs`

    nuxt.hook('nitro:config', (nitro) => {
      nitro.publicAssets ||= []
      nitro.publicAssets.push({
        dir: libDir,
        maxAge: 3600
      })
    })

    nuxt.hook('nitro:build:before', async () => {
      await build({
        publicDir: false,
        plugins: [
          unocss()
        ],

        build: {
          lib,
          outDir: libDir
        }
      })
    })
  }
})