First concept

node_modules/next/dist/esm/build/templates/middleware.js

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+import "../../server/web/globals";
+import { adapter } from "../../server/web/adapter";
+// Import the userland code.
+import * as _mod from "VAR_USERLAND";
+const mod = {
+    ..._mod
+};
+const handler = mod.middleware || mod.default;
+const page = "VAR_DEFINITION_PAGE";
+if (typeof handler !== "function") {
+    throw new Error(`The Middleware "${page}" must export a \`middleware\` or a \`default\` function`);
+}
+export default function nHandler(opts) {
+    return adapter({
+        ...opts,
+        page,
+        handler
+    });
+}
+
+//# sourceMappingURL=middleware.js.map