template-vue/scripts/dev.js

import { build, preview } from "vite";

(async () => {
  try {
    await preview({
      BASE_URL: "/",
      MODE: "production",
      DEV: false,
      PROD: true,
    });
    console.log("Preview server is running...");
    console.log("Listening on http://localhost:4173\n");

    const watcher = await build({
      build: {
        watch: {},
      },
    });
    console.log("Build in watch mode is running...");
  } catch (err) {
    console.error("Error:", err);
  }
})();