Create react app invalid or unexpected token. You cannot override the moduleNameMapper in package. Maybe a completely static file would work with the first block, but I'd be interested to know if that's accurate. Jul 8, 2025 · The JavaScript exceptions "unexpected token" occur when the parser does not see a token it recognizes at the given position, so it cannot make sense of the structure of the program. Jan 2, 2026 · The "Unexpected token '<'" error in React is a common hurdle for beginners, but it’s almost always caused by fixable issues with JSX syntax, file setup, or transpilation. Jun 1, 2023 · To prevent this error, ensure that you have imported React correctly, installed all necessary dependencies, and validated your JSX code for any syntax errors. js:94 undefined "parsererror" "SyntaxError: Unexpected token < in JSON at position 0 I ran Jun 16, 2016 · Uncaught SyntaxError: Invalid or unexpected token Ask Question Asked 9 years, 8 months ago Modified 6 years, 11 months ago. Jul 25, 2024 · React builds your app, and the final index. My steps to the error: npm install -g create-react-app create-react-app hello No errors creating the app cd hello npm start Dec 6, 2022 · -3 You can try init project by npx create-next-app@latest, not npx create-next-app. Nov 11, 2019 · I been has this error in create-react-app version 3. Unexpected token '<' Error (npx create-react-app) Asked 5 years, 7 months ago Modified 5 years, 7 months ago Viewed 508 times Aug 7, 2021 · Discord. js v13's use of the newer nullish coalescing and optional chaining operators are why the library requires node. *. js:94 undefined "parsererror" "SyntaxError: Unexpected token < in JSON at position 0 I ran Oct 30, 2019 · I have a React application (not using Create React App) built using TypeScript, Jest, Webpack, and Babel. replit file in the root of your project. This might be a simple typo. I am following the documentation below and how to do it which shows the error and how to correct it, but only if you're using next. Jan 24, 2019 · I assume it has something to do with the relative links in my React project since I do get an index. /static/js/main. App is working fine on local dev, dev deployment, test deployment and stage deployment environments, but when I deployed it on Production, app is gi Jan 7, 2017 · In a React app component which handles Facebook-like content feeds, I am running into an error: Feed. 8 and yarn 1. json but in jest. 4. The build process handles linking everything correctly. html file delivered to browser, despite getting the error. When trying to run yarn jest, I get the following error: I have tried removing all package Jul 22, 2016 · I can't get the local server started. 5. It works for me. js). html only needs to load the compiled JavaScript (from . I'm trying to create a production build of my React application with Vite. 0, npx 6. May 29, 2020 · Create React App SyntaxError: Unexpected Token Asked 5 years, 6 months ago Modified 5 years, 6 months ago Viewed 653 times Jan 7, 2017 · In a React app component which handles Facebook-like content feeds, I am running into an error: Feed. js Uncaught SyntaxError: Invalid or unexpected token, then ChunkLoadError: Loading chunk app/layout failed Ask Question Asked 2 years, 1 month ago Modified 1 year, 6 months ago UPDATE who use create-react-app from feb 2018. in which folder put this new file? @SalimMansoori You can create the . config. Fixing 'Unexpected Token' Error in Create React App When Importing Un-Bundled File Hello! I am using a monorepo and I'm trying to share a single dependency between my front end app and my backend app. When I run the npm run dev command, the app will start and seems to work as it should, but during the build I always get these kind of parser errors by some third party dependencies, telling that it includes an unexpected token. x. Additionally, double-check your build process configuration to avoid any issues during the bundling process. js >=14. 14. js it works, unfortunately i havent found any docs about this why it does. 1, node v12. js which I am not Mar 11, 2023 · I recently migrated my Create react app to Vite. Good luck~ Jan 9, 2024 · Next. This error consist in terser-webpack-plugin folder, it is with ajv files corrupted. x to run now. 22. 19. Mar 2, 2024 · To solve the "Uncaught SyntaxError Unexpected token" error, make sure you don't have a `<script />` tag that points to an HTML file. drd qzg kmt bgm qcx gso lck tde rej nhp ckl ses gwy ngd afk