Bundle browser script, add package exports, add sourcemaps

vite.config.ts

@@ -0,0 +1,31 @@
+import { resolve } from "path";
+import { defineConfig } from "vite";
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  build: {
+    outDir: resolve(__dirname, "dist"),
+    lib: {
+      entry: resolve(__dirname, "dist/browser-vite.mjs"),
+      formats: ["es"],
+      fileName: () => "browser.mjs",
+    },
+    emptyOutDir: false,
+    minify: false,
+    sourcemap: true,
+  },
+  worker: {
+    plugins: [
+      {
+        name: "append-source-url",
+        generateBundle(options, bundle) {
+          Object.entries(bundle).forEach(([file, output]) => {
+            if (output.type === "chunk") {
+              output.code += `\n//# sourceURL=${file}`;
+            }
+          });
+        },
+      },
+    ],
+  },
+});