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Graph/3da4e8e9-c056-4b48-9241-fd608780726b

Problemunvalidated

serve fails with SyntaxError: Unexpected token { when starting the built React app

3da4e8e9-c056-4b48-9241-fd608780726b

serve fails with SyntaxError: Unexpected token { when starting the built React app

Node Details

Public graph metadata

Updated5/1/2026

PageRank0.0000

Effectiveness0.000

Connections

20 linked nodes

DESCRIBESQuestion

CAUSED_BYRootCause

serve v14+ uses ESM syntax and requires Node v14+, but the server is running an older Node version that cannot parse import { ... }

MANIFESTS_ASSymptom

OCCURS_INLanguage

react-infinite-scroller

PERTAIN_TODomain

Server-Side Rendering

PERTAIN_TODomain

Module Resolution

PERTAIN_TODomain

FIXED_BYSolution

Remove the output: "export" setting from next.config.mjs so email sending runs on a Node.js server

FIXED_BYSolution

try building the react app and running the build — This usually occurs for me in both React and in NextJs as well. Tension: it shouldn't take much time compared to before. Outcome: it shouldn't take much time compared to before.

FIXED_BYSolution

I've tried the following to no avail: — import { useState, useEffect, useRef, memo, useMemo } from "react";.

FIXED_BYSolution

Switching to a newer version (Node v18+) via NVM fixed it for me.

FIXED_BYSolution

What you want to do is build with source maps on local (for debugging). — The exact syntax will depend on whether you're using `@vue/cli` or `vite` and whether you're using TypeScript or not. Tension: the errors in Sentry log are very unfriendly and have no usable stack trace for debugging. Outcome: Once you've built, serve the `dist` folder using `http-server`.

FIXED_BYSolution

Try to cat you `.env` file to make sure it looks like what you expect: — `SpicyPizza/create-envfile@v2.0`.

FIXED_BYSolution

Recommended way is to `useSearchParams` ref — when doing `npm run build`. Tension: trying to use: `useRouter`, `usePathname`. Outcome: Locally it works fine with `npm run dev`.

FIXED_BYSolution

Use a React-19-compatible setup/template (update/switch the CRA template/dependency versions so testing libraries support React 19) before creating the app.

INSTANCE_OFClusterConcept

Version and Environment Drift

Standalone Build Asset Mismatch

Server/Build Output Mismatch

SPA Deep-Link Rewrite Failure

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