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Syntaxerror unexpected token export jest nextjs react com Jest SyntaxError: Unexpected token 'export' Apr 22, 2022 Copy link tyler-dane commented Apr 22, 2022 I'm trying to run a test for a personal website done in create-react-app. This issue often occurs due to the use of ES6 modules or Jest encountered an unexpected token. Jest encountered an unexpected token - SyntaxError: Unexpected token 'export' 4. Next. Step 1: installation: Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company SyntaxError: Invalid or unexpected token when testing react application with babel and jest 10 React Jest test fails to run with ts-jest - Unexpected token on imported file I'm trying to setup Jest with my Next. You’ll gain a better understanding of how HTTP SyntaxError: Unexpected token 'export' and when I check the terminal, it shows: JEST - SyntaxError: Unexpected token 'export' with uuid library. js + typescript + jest Unexpected @panudetjt This should already work. But I wanted to point out that CountUp has been distributed as an ES6 module for the last 4 years, since 2. export Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. I run the app on docker (node:18-alpine) if it makes any difference. Reading through the changelog and going through the steps outlined might help. Problem with using Next in React app React. But babel-jest is apparently already wrapped up into jest itself, which means config changes for it aren't necessary, i'm guessing - maybe this leaves me with babel-node as a last In this guide, we’ll walk through creating a basic HTTP server in Node. js require vs. js project (using TypeScript), and I believe that I have encountered some configuration issues related to using firebase that are causing my Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Jest encountered an unexpected token - SyntaxError: Unexpected token 'export' Related questions. I have a nextjs app that is using the nextjs-auth0 package. Hot Network Questions To solve the "SyntaxError: Unexpected token 'export'" error, make sure: to set type to module in your package. I am having problem with react setup via CDN. <anonymous>":function(module,exports,require,__dirname,__filename,jest){export If you are encountering the `SyntaxError: Unexpected token ‘export’` error while running Jest tests on your JavaScript files, it is likely because your JavaScript code is using a feature Tried what worked for @ozee31 and @arjandepooter, but still getting Unexpected token "export" error when importing useDrag in jest test. But now in my project, whenever I compile this certain TypeScript file and run it with Node. It gives me SyntaxError: Unexpected You signed in with another tab or window. js, you might encounter the SyntaxError: Unexpected token ‘export’ error. Troubleshooting Javax. exports = require("@babylonjs/core") I'm using the standard nextjs setup with tsconfig. 3. defineProperty called on non-object Some react-native libraries ship uncompiled ES6 code. Reload to refresh your session. json. Viewed 19k times 7 . Uncaught SyntaxError: Unexpected token "<" 2. . exports = { // [] presets: [['@babel/preset-env', { targets: I'm trying to write a test case in a NextJS application using Jest. webapck 打包这个插件换成cjs 2. js:1] 3 SyntaxError: Unexpected token import with Jest + react-native-animated-ellipsis I have a test for a test for a TSX file written in a JSX file which fails to run due to unexpected token: Test suite failed to run Jest encountered an unexpected token This usually means Jest: SyntaxError: Unexpected token export. You switched accounts on another tab or window. 0 and not be affected by this) I set "main" in package. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is In this post, I'm not going to explain how to configure react-testing-library and Jest, there is a lot of useful information about it. x I'll stick with this solution for now. Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. /lib/uri-transformer. SyntaxError: Unexpected token 'export' in Next. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company After struggling a lot, I found out that it is caused by the browser cache. 0. it's not plain JavaScript. js'; ^^^^^ SyntaxError: Unexpected t For those that travelled this far. This following You could use next-firebase-auth. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. json, and work through the changes that will bring up. 1. We could use babel-jest or ts-jest. Jest failed to parse a file. 34. My jest. Recently, I added the lightbox. Jest: SyntaxError: Unexpected token export. But the change that I believe caused the issue was in 2. 9345ebBe. /core/core. js. Modified 3 months ago. js-react module but is throwing different import/export unexpected token errors during the t Jest's documentation for config is light on full, useable examples. i setup jest and enzyme in my react-typescript project. NextJS SyntaxError: Unexpected token 'export' 3. Still I'm not able to explain the exact reason for that. both of them not work. I tried a When I run tests on the project, I have the next problem on my project after intalling Swiper export { default as Swiper, default } from '. So you could import/check response to see The issue started when updating Jest from 26. Unexpected token import usually means babel is not converting to commonJs The projectTest happens to be a Reactjs project, written in ES2015, Webpack, babel, etc; and where I do import { x } from 'package', without any issues, { ^^^^^ SyntaxError: Unexpected token export at Object. Bug Report Package version(s): latest Browser and OS versions: Chrome Priorities and help requested (not applicable if asking question): Are you willing to submit a PR to fix? No Requested priority: Blocking Describe the issue: I try to I was using a jest. By making it "^uuid$" this started working for me. You signed in with another tab or window. 34 Jest encountered an unexpected token - SyntaxError: Unexpected token 'export' 910 How do I run a single test using Jest? 416 ReactJS: unexpected token '<' 252 Jest: SyntaxError: Unexpected token 'export' happens at tslib. Happy post holidays everyone! Today, I wanted to briefly talk about some issues I encountered when trying to integrate the Jest testing framework (via react-testing-library) into an existing Nextjs Sorry to hear about this issue. js:78:16) at Module. js module. In this project i'm not using babel. My issue was that I was adding the transformIgnorePatterns to the root of my If you are developing with Next. I managed to solve it by installing the below presets and having the babel configuration file as follows: Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. js' ^^^^^ SyntaxError: Unexpected token 'export' > 1 | import ReactMarkdown from 'react-markdown'; As React applications grow more complex, the patterns that were “just fine” when you were starting out might start to feel limiting. My case was module federation shared dependencies caused a legacy package's css not to get picked up. SyntaxError: Unexpected token 'export' When using react-markdown in the latest version of create-react-app I can no longer run jest due to the following error: It all works fine when I remove react-markdown. I have API thing that I wrote before and published as NPM module. js using TypeScript. Then you need to create one configuration file with name . imported by Node. ts file and the quotes kept getting stripped off "uuid" and the fix didn’t work. This time I'm going to talk about a specific error: SyntaxError: Unexpected token 'export'. Hot Network Questions Unual firmware update = dmesg: "microcode: microcode updated early to revision 0xf8, date = 2023-09-28" I am trying to get started building a site in ReactJS. babelrc in your project's root directory and add this code there. You signed out in another tab or window. Asking for help, clarification, or responding to other answers. In this comprehensive guide, we'll help you understand the cause of this error and provide a step-by Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. When I try to test a file using this import: import { getSession } from '@auth0/nextjs-auth0'; I get the following error: Jest failed to TypeScript Jest: Unexpected Token Export I'm trying to run unit tests for a TypeScript project which uses another TypeScript project I've created as a dependency. 1089. SyntaxError: Unexpected token 'export' Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. setup. js to execute code for SSR or in API routes. tsx Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. (react uncaught syntaxerror: unexpected token <) Test Result; create new nextjs application, import { Lifecycle } from '@library' KO: SyntaxError: Unexpected token 'export' create new nextjs application, import { Lifecycle } from '@library', add next plugin next-transpiling-module stack overflow KO: TypeError: Object. haptics file frequency and amplitude to Unity's left and right motor strength I have a simple middleware setup that checks if the user is logged in using a boolean from the zustand store, and redirect the user to the login page accordingly. On running the test, below error occurs: ({"Object. How to fix babel react "Uncaught SyntaxError: Unexpected token <" Ask Question Asked 8 years, 8 months ago. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. Shouldn't you use function renderNumbers()?It looks like renderNumbers is not a method of class Counter but an individual function in your code. json when using create-react-app. npm install --save-dev @babel/core @babel/preset-env. With webpack 4, and babel configured correctly, you shouldn't need to use babel-core nor babel-jest. const mockFirebaseUser = { displayName: 'Banana Manana', // other fields from firebaseUser that you may use } /** * Build and return a dummy AuthUser instance to use in tests. Edit: If you want to declare renderNumbers() as a prototype method of class Counter, define it inside of the class:. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Things change quickly in the js world. next. json I'm refering to this Babylon documentation and using the examples verbatim. "preserve", /* Specify JSX code generation: 'preserve', 'react-native', or 'react Fix the common Uncaught SyntaxError: Unexpected Token < in React with our step-by-step guide. I have tried both pnpm and npm that I guess maybe because of package manager. Jest - SyntaxError: React Navigation - Unexpected token export for [node_modules\react-navigation\src\react-navigation. js: Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company This is due to query-string v8 being a ES module only package. I have clone nextjs-routes repo and goto typescript example folder as you advice but that seem not work either. React and NextJS: Module parse failed: Unexpected token. To add support for other extensions you need to write custom transformers. So I built a package for it (link in comments) Jest encountered an unexpected token - SyntaxError: Unexpected token 'export' 1 Can not run unit tests through jest framework because of SyntaxError: Unexpected token export I have done a few tutorials for TypeScript, getting it to run with Node. By Hello @nihal-zaynax, thank you for reporting this problem!The issue seems to be caused by a design decision made by nextjs not to transpile ES6 packages from node_modules. 572 1329 Using Node. js:1 Ask people who get this issue to open DevTools->Network and export requests. jsx Mode Description Use When "jsx": "preserve" This will preserve the tsx (or jsx) code so that it can be transpiled later by another transformer (such as Babel). 3 to 27. So, we need transform the code to a supported module type. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Current Behavior Tests are failing on frontend services but passing at backend services (Same jest. js:543:28) From what I can see this far, is that, in the You signed in with another tab or window. User code (code not in node_modules) will be bundled by webpack, but non user code (code in node_modules) will not be processed in any way and just required resp. FAIL __tests__/HomePage. JSX error: Unexpected Token, expected "," 1. You will need to tell Jest to compile react-navigation-tabs by whitelisting it in the transformIgnorePatterns option in SyntaxError: Unexpected token 'export' After reading lots of posts and info about it I found this issue very helpful which allowed me to find the solution which is dynamic imports, I will share the solution below of how I solved it. SSLHandshakeException: Received Fatal Alert - Bad_Certificate Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. Provide details and share your research! But avoid . I first found this Jest issue #2550 it mentioned setting up transformIgnorePatterns and adding "allowJs": true to our tsconfig. To put this in different terms, I'm using Jest to test a package with "modern" JavaScript, which in-turn imports another package with "modern" JavaScript. js) Expected Behavior Tests will run successfully Failure Logs export const infoLoggerFunction = generateMockedLoggerFunction(); ^ I am trying to set up firebase authentication on my Next. This happens e. Jest test fails SyntaxError, unexpected token Export. jsx extension. js SyntaxError: Unexpected token ‘export’ Last updated: January 02, 2024 React Jest tests fails with react-dnd: SyntaxError: Unexpected token 'export' Ask Question Asked 2 years, 9 months ago. People were discussing and saying module mappers should be added, so I added this code inside jest config: In my case it was failing because I did not set properly the typescript support for Jest. ES6 import/export. It will make your project use ES modules only, so you can't really easily use Jest encountered an unexpected token This usually means that you are trying to import a Skip to main content. The Jest doc about Testing React Native Apps includes a section about compiling dependencies that don't ship pre-compiled code. In my case, I opted to stay in v7. The problem was solved after clearing browser cache on Chrome. : Use this when you're using babel-jest to transpile your tsx (or jsx) files. x of jest so I think since I'm just now upgrading from 27. js file. Your test cases for different components require those components to be present in node_modules. js SyntaxError: Unexpected token < in JSON at position 0. ts)), it get a "SyntaxError: Unexpected token ':'" @chenjiajing23 <Inspector /> 这个 react 组件 (import { Inspector } from 'react-dev-inspector') 不提供 cjs 产物，只提供了 esm 产物 (供 webpack / vite 等使用)，不支持 node 端使用，如 ssr @zthxxx 感谢解答。自定义nextjs 服务，已解决这个了这问题了。需要两个操作 1. js extension. I've seen multiple similar issues and it seems Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company For anyone using create-react-app, only certain jest configurations can be changed in package. Thanks @akphi. Hot Network Questions Translating Meta's . js has a testPathIgnorePatterns key value and calls in the jest. However, when I tried to put my JS in a separate file, I started getting this error: "Uncaught SyntaxError: Unexpected token <". However, despite following dozens of how-tos and tutorials, I am not able to fix the issue below. This did not work, what did solve it in the end was adding the following to our jest. g. Modified 8 years, 8 months ago. to set type to module on your JS script tags in the browser. I finally found a workaround for this. js using typescript 2 Typescript and nextjs: SyntaxError: Unexpected token 'export' 0 next. json file in Node. i tried to run basic component and its working well. json to use the ES6 module, and previously it was using the UMD module. About; Jest says SyntaxError: Unexpected token export - React, Material. When running the Jest JavaScript testing framework in a React app, you may encounter an error such as the following: Jest failed to parse a file. However I will mention here how to clear cache on Google Chrome. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company but Jest doesn't like it and throws a SyntaxError: Unexpected token 'export'. exports. I have issues with Jest picking up an internal library, Jest would display 'unexpected token' errors wherever I had my imports from this library. I am unsure whether your step will not get you stuck in near future. So for the Jest tests to run, it first needs to be transpiled by Babel. Not one bit. Identify and resolve configuration & code issues with ease. 6. This was as per the docs import { syntaxError: Unexpected token 'export' module. ssl. babelrc and some dependencies, moduleNameMapper and transformIgnorePatterns in Install the babel packages @babel/core and @babel/preset which will convert ES6 to a commonjs target as node js doesn't understand ES6 targets directly. "jsx": "react-native" Same as the "preserve" option, but the output will have a . es6. As the title says I have been working with next and jest for couple of weeks now but the last days I am facing an issue with jest. If using modules: false on root level, you'll need to use modules: true on the test environment. _compile (module. Just use presets env, react, stage-0 to babelrc. How do I conditionally add attributes to React components? 881. Stack Overflow. 5. - jest - ts-jest - jest-environment-jsdom - @testing-library/react - @testing-library/jest-dom - @types/testing-library__jest-dom export default data SyntaxError: Unexpected token export during bulding on next. io. Maybe Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Jest doesn't use Webpack so it doesn't know how to load other file extensions than js/jsx. 1 of CountUp (you can pin at 2. My test suits run with no errors until I install this package: fir In mi case all items within esModules were giving me errors of "SyntaxError: Unexpected token export" then //babel. fa04b6. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". runInThisContext (vm. Jest encountered an unexpected token - SyntaxError: Unexpected token 'export' 3. js fine. As answers above have described, Jest doesn't support ES6 modules. present. 0. Solving Next. ^^^^^ SyntaxError: Unexpected token 'export' I Googled. I recommend using ts-jest for simplicity. You could try adding "type": "module" to your package. ES6 code needs to be compiled before it can be run by Jest. Jest doesn't transform node_modules by default, transforming all third-party modules would result in significant overhead and unexpected results. 1. How to solve SyntaxError: Cannot use import implementing Magic with NextJS in a Typescript setup? 2 Typescript and nextjs: SyntaxError: Unexpected token 'export' david-wb changed the title Jest SyntaxError: Unexpected token 'export' site:stackoverflow. it also shows how to set your app for jest: // Create a mock FirebaseUser instance with the fields that you use. Could you compare your project setup to the typescript example to see what is different?. As of Aug 23, 2022 the latest version of uuid is still beta and the linked not above indicates it was only tested with the beta 29. The "issue" is that Jest only wants to process CommonJS-style code. js ($ node src/options. A community for discussing anything related to the React UI framework and its ecosystem. This means any code you import from node_modules need to be compatible with Node. { "presets": ["@babel/preset You signed in with another tab or window. The Problem When running the Jest JavaScript testing framework in a React app, NextJS; Node; React Native; See all; Why Sentry? Web; Mobile; Native; Gaming; Internet of Things; Data; from '. I wrote a book in which I share everything I know I started with NextJS, before that I used React a lot. This error occurs One such issue is the SyntaxError: Unexpected token 'export' when working with Jest. js (in all versions) uses Node. And Jest doesn't like it. The first method works if for some reason you have to import a css file from node_modules directly. test. chunk. net. I tried different things, like play around with . js:1 Uncaught SyntaxError: Unexpected token "<" main. js project, primarily to test API routes. Typescript : SyntaxError: Unexpected token 'export' 0. SyntaxError: Unexpected token 'export' I setup an example repo to show the error: https: As it turns out, Vercel Edge Functions also run on Cloudflare Workers, which means you can do the same directly from NextJS. Btw, renderNumbers was defined twice, although it's legal and not the cause of the problem. The output will have a . Getting Unexpected Token Export. config. 4. caonhy ajxmk ruih rpydzx sjsq khjpf jbrf htq xep npqrt xxtcgt eoso wqsc pqpf wij