define build as library

vite.config.ts

@@ -1,8 +1,25 @@
+import path from "path";
 import { defineConfig } from "vite";
 import react from "@vitejs/plugin-react";
 
 // https://vitejs.dev/config/
 export default defineConfig({
+  build: {
+    lib: {
+      entry: path.resolve(__dirname, "src/index.ts"),
+      name: "cellpop",
+      fileName: (format) => `index.${format}.js`
+    },
+    rollupOptions: {
+      external: ["react", "react-dom"],
+      output: {
+        globals: {
+          react: "React",
+          "react-dom": "ReactDOM",
+        },
+      },
+    },
+  },
   plugins: [react()],
-  base: "/cellpop/"
+  base: "/cellpop/",
 });