Nextjs jest syntaxerror unexpected token export. Apr 22, 2022 · Jest SyntaxError: Unexpected token 'export' #3443 Open david-wb opened on Apr 21, 2022 Dec 23, 2020 · 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. js when using react-syntax-highlighter Use this import path: Fix the 'Unexpected token export' error in NextJS May 22, 2023 · During the execution of unit tests, Jest, a popular testing framework, throws a SyntaxError: Unexpected Token ‘export’. However, you may encounter the error unexpected token 'export' when using Jest. It silently skipped next-intl. In your case, lodash-es specifically exposes ES modules, which will need to be built by Jest via babel. If a component is single, and not importing anything else, "npm test" runs smoothly. In the Auth Context I import things I need dire Mar 30, 2023 · Jest encountered an unexpected token Jest failed to parse a file. js SyntaxError "Unexpected token 'export'"? Use next-transpile-modules to transpile your library. Jul 3, 2023 · Jest tests are failing because of an unknown unexpected token "export" Ask Question Asked 2 years, 8 months ago Modified 9 months ago Oct 19, 2025 · When working with TypeScript projects and using Jest as the testing framework, developers often encounter the SyntaxError: Unexpected token 'export' error. Next. I think this might have to do with Nexts SWC compiler potentially May 5, 2025 · Jest encountered an unexpected token Jest failed to parse a file. Sep 12, 2021 · I'm trying to export a function from a Js file but recieving a Unexpected token error Feb 13, 2024 · FAIL src/utils/html-to-markdown. css$': '<rootDir>/emptyModule. Internally, preact provides a "browser" field, but the file is ESM, which jest does not natively support without a babel transform. js is typically caused by ESM dependencies that aren’t transpiled or incompatible module systems. Jest unexpected token 'export': How to fix Jest is a popular JavaScript testing framework. This error can be frustrating, especially for those new to TypeScript and Jest. Watching learners go from writing their first Aug 10, 2022 · I have a monorepo with 3 packages, namely: web-app: A NextJS 12 project in Typescript web-core: A redux-toolkit project used in web-app web-ui: A storybook project with components which are being Aug 10, 2023 · The export keyword is a part of JavaScript specification that allows you to export a module so that other modules can use that module using the import keyword. It seemed whenever React is importing something else, such as this one: May 3, 2022 · Version 28. component Nov 22, 2021 · Jest encountered an unexpected token Jest failed to parse a file. This is the recommended solution in bullet number 3. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration. This can happen for a number of reasons, but the most common cause is when you forget to add the `export` keyword to the declaration of a variable or function. js and TypeScript when using createUserWithEmailAndPassword in firebase/auth Ask Question Asked 3 years, 1 month ago Modified 3 years, 1 month ago Mar 17, 2020 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. spec. It has been an incredible privilege to build and nurture this platform. Sep 6, 2023 · Jest failed to parse a file. Q: How can I fix the syntax error “unexpected token ‘export'” in Jest? A: To fix the syntax error “unexpected token ‘export'” in Jest, you will need to make sure that the variable or function that you are trying to export is declared in the current scope. js with this step-by-step guide. js as below. Sep 12, 2025 · By default, Jest ignores everything inside node_modules for transformation. Now I want to test multiple components together, and I immediately get this error: SyntaxError: Unexpected token . Today, we are announcing our decision to wind down operations at Codedamn. This is because Jest cannot parse the dependency’s public API file, which includes an export statement. On running the test, below error occurs: Dec 5, 2025 · The SyntaxError: Unexpected token 'export' in Next. Working on a Nextjs application and Jest works as expected unless I add the MUI modules. Feb 10, 2024 · Problem When trying to run a Jest test, you encounter the following error related to the uuid package: Jest encountered an unexpected token Jest failed to parse a file. You can try narrowing your whitelist down so Jest doesn't try to pass every JavaScript file within node_modules through babel. After updating the node to v20 and triggering Jest tests for certain app Im getting the following error - SyntaxError: Unexpected token ' I updated some dependencies (react, jest and others), and I also got the error: Jest encountered an unexpected token - SyntaxError: Cannot use import statement outside a module The Jest unexpected token error occurs when Jest encounters a token that it does not expect. babelrc and some dependencies, moduleNameMapper and transformIgnorePatterns in jest. ts Test suite failed to run Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. The threads span a number of years - meaning that the issue keeps cropping up for people repeatedly. Many of the threads are long. Specify correct regex transformIgnorePatterns: for me it was 2 packages next-intl and use-intl You Dec 27, 2021 · When trying to test _middleware. Here's what you can do: • To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in Oct 31, 2024 · When working with Typescript and Jest for testing your code, you may encounter the error "SyntaxError: Unexpected token 'export'" in your test files. This error occurs because Jest doesn't natively support ES modules in Typescript files. Jest SyntaxError Unexpected Token: Learn how to fix the Jest SyntaxError Unexpected Token error with step-by-step instructions and code examples. Aug 12, 2022 · Solution for Unexpected token 'export' in Next. Mar 17, 2025 · Description Since the recent move of next-intl to ESM, running tests with Jest broke. Component { ^^^^^^ SyntaxError: Unexpected token export at transformAndBuildScript (node_modules\jest-runtime\build\transform. May 22, 2023 · By following these steps, you should be able to resolve the `SyntaxError: Unexpected token ‘export’` error and run your Jest tests on JavaScript files that use ES6 modules or other non Jest setup "SyntaxError: Unexpected token export" Asked 9 years, 1 month ago Modified 2 years, 4 months ago Viewed 96k times Apr 26, 2022 · I'm also getting this error with just a vanilla Jest 28 set up using Nextjs internals. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel The Jest SyntaxError: Unexpected Token 'export' error occurs when you try to export a module in your Jest test file but you don't use the export keyword correctly. Verifications I've verified that the problem I'm experiencing isn't covered in the docs. The jest unexpected token export error is a common error that can be caused by a variety of factors. Nov 23, 2022 · ^^^^^^ SyntaxError: Unexpected token 'export' > 1 | import { v4 as uuid } from "uuid"; | ^ There are several tips on what might be wrong and recommendations on how to resolve it. Oct 8, 2024 · エラー内容 FAIL src/hoge. Dec 13, 2022 · The problem is still there. json for jsdom. js-react module but is throwing different import/export unexpected token errors during the t May 7, 2025 · Jest encountered an unexpected token Jest failed to parse a file. Modify field transformIgnorePatterns in your jest config to allow babel/whatever transforming for change-case node module as well (docs): reactjs: Jest setup &quot;SyntaxError: Unexpected token export&quot;Thanks for taking the time to learn more. I'm trying to import a functions from a dependency to my next/react functional component, but somehow I keep getting the following error: SyntaxError: Unexpected token 'export' That's the functio Jul 5, 2022 · The fact that Jest is calling “export” an unexpected token means that Jest is viewing this file as a commonjs package and it should be viewing it as an ESM package. test script May 31, 2023 · 実現したいこと Next. Because the uuid library I upgraded now did not pre-compile its ES modules, I had to transpile it. 3 Steps to reproduce Full PR with the failing build is here OctoLinker/OctoLinker#1563 Expected behavior Prior to v28 this project built just fine, but now we're getting SyntaxError: Unexpected token 'export' errors from the jsonpath-plus package. Jan 2, 2024 · When you see a SyntaxError complaining about an unexpected ‘export’, you are mostly dealing with an incompatibility between module types. js and Node. js Test suite failed to run Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". This might be a simple typo. This can happen for a number of reasons, but the most common cause is when you forget to use the `export` keyword. Jun 15, 2022 · Next. js Apps Problem: Running into the following error when trying to run unit tests for a Next. 1) #12036 The syntaxerror: unexpected token ‘export’ jest error is a common error that occurs when you are trying to export a function, variable, or object from a JavaScript file. Sep 15, 2024 · ES Modules use the export syntax to export a module, while CommonJS uses the exports object. I follow the instructions on the Jest site, but for some reason I get: SyntaxError: Unexpected token &lt; I can test Jan 22, 2022 · Jest encountered an unexpected token Jest failed to parse a file. <anonymous> (src\components\category-tree\category-tree. js file Create a file named emptyModule. Includes causes of the error, how to identify the problem, and the best Aug 1, 2022 · next. test. By using transpilePackages, dynamic imports, or updating dependencies, you can resolve this issue. <anonymous> (src\components\category\category. The Jest SyntaxError: Unexpected Token 'export' error occurs when you try to export a module in your Jest test file but you don't use the export keyword correctly. This error can occur for a variety of reasons, but it is usually caused by a syntax error in your code. Here's what you can do: • To have some of your "node_modules" files transformed, you can Feb 5, 2025 · I'm trying to run a test for a personal website done in create-react-app. I tried to add transformIgnorePatterns and moduleNameMapper to my jest config but it doesn’t work and I didn’t find any topic/thread about that. Jul 11, 2016 · Thank you! I tried the above (Export and ES6) with TypeScript (. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. js in the root directory of your application Here is my full jest. Oct 23, 2023 · Have you configured jest together with react-testing-library and now gotten Jest SyntaxError: Unexpected token 'export' when building? I tried multiple things, like modifying . As far as I can tell that package has the correct exports for use with jsdom like we Jan 13, 2023 · Jest encountered an unexpected token Jest failed to parse a file. Aug 4, 2023 · The root cause Next. it's not plain JavaScript. Over the past several years, Codedamn has grown into a platform trusted by hundreds of thousands of aspiring developers and working professionals to build real-world skills through hands-on practice. These errors can occur due to non Jun 3, 2019 · Hello! I get SyntaxError: Unexpected token export when trying to running my test. /core/core. This happens e. js'; ^^^^^^ SyntaxError: Unexpected t Oct 30, 2023 · Jest encountered an unexpected token Jest failed to parse a file. js:5 export default class FaAngleDown extends React. I'm getting the dreaded SyntaxError: Unexpected token export when trying to run jest. js:1. js default to CommonJS modules. config. Did anyone else come across this issue? Oct 30, 2019 · For me, the following: ` "test": "NODE_OPTIONS='--experimental-vm-modules --experimental-specifier-resolution=node' jest",` doesn't fix the error, but instead changes it from SyntaxError: Cannot use import statement outside a module to Must use import to load ES Module: Nov 3, 2022 · I'm trying to test a page in NextJs that has a firebase context provider that initializes firebase and another that controls access to firebase/auth. May 25, 2022 · [Solved] SyntaxError: Unexpected token ‘. Mar 2, 2024 · To solve the "Uncaught SyntaxError Unexpected token 'export'" error, set the `type` of your `<script />` tags to `module`. js:2:44) at Object. Oct 21, 2024 · 在使用 Next. js と AWS Amplify を使ったプロジェクトで、TypeScriptのファイルに対してJestのテストを書いたら、 SyntaxError: Unexpected token 'export' エラーが発生。 このエラー自体はよくあるやつだが、設定を大きくいじらず解決する方法を調べるのに結構時間がかかったので、対処法をメモ。 環境 環境についての Nov 21, 2024 · 経緯 Next. Oct 14, 2024 · Im working on a NestJS project which used to run on node v16. js 不支持 import/export 语法的原因。在本文中，我们将解释这个问题的原因，并展示如何解决这个错误。 Jan 25, 2017 · 38 I am now using React Jest to test code. The solution: Move away from next/jest: just provide the configuration for jest in jest. js', in your jest. 0. Jun 18, 2021 · Jest encountered an unexpected token Jest failed to parse a file. JSでFullcalendarを使用していて、jestで単体テストを書いている中で 「SyntaxError: Unexpected token 'export'」というエラーが発生したのでその解消時の内容を備忘として残しておく。 事前準備 その前にjestの設定としてやったことも残しておく。 参考 Dec 28, 2022 · Jest encountered an unexpected token Jest failed to parse a file. Nov 16, 2021 · I appreciate this is perhaps more of an issue with the third party package but interested to know if there's a way I can support it in my build ? Expected Behavior Expectation is a smooth build regardless of syntax used To Reproduce Install latest nextjs and amcharts5 and run build Jul 31, 2023 · When I run tests on the project, I have the next problem on my project after intalling Swiper export { default as Swiper, default } from '. jsプロジェクトでのJestでのテスト実行 前提 Next. js with Jest, I'm unable to import { NextResponse } from 'next/server' without throwing an error SyntaxError: Unexpected token 'export' because next/server uses export { NextRequest } in line 1. Learn how to fix the unexpected token export error in Node. FAIL src/index. js application using the jest … Oct 15, 2022 · How do I resolve SyntaxError: Unexpected token 'export' in react nextjs project? [duplicate] Asked 3 years, 5 months ago Modified 3 years, 5 months ago Viewed 10k times 9 I've seen some other answers and GitHub issues that describe this, but I haven't been able to find a solution in my case. js + typescript + jest Unexpected token 'export' Ask Question Asked 3 years, 7 months ago Modified 3 years, 5 months ago Dec 24, 2023 · When running Jest tests with tsx (or jsx) React components, you might encounter the " SyntaxError: Unexpected token '<' " error like the following: Jest encountered an unexpected token May 25, 2022 · Here is a potential solution that worked for me: Include the following line: '\\. Oct 19, 2025 · The SyntaxError: Unexpected Token 'export' error in Jest TypeScript projects can be a common roadblock, but by understanding the root causes and following the usage methods, common practices, and best practices outlined in this blog post, you can effectively resolve this issue. To fix this, you need to explicitly tell Jest to transform jose instead of skipping it. Jan 27, 2023 · Jest encountered an unexpected token with Next. Aug 2, 2022 · JEST - SyntaxError: Unexpected token 'export' with uuid library Asked 3 years, 7 months ago Modified 4 months ago Viewed 63k times Sep 16, 2022 · Jest encountered an unexpected token Jest failed to parse a file. By following the tips in this article, you can help to prevent this error from occurring in your own code. Nov 30, 2022 · I'm trying to write a test case in a NextJS application using Jest. ’ Jest Error for Next. I can get past the Unexpected token 'export' by changing the import to the dist/components folder: Jest encountered an unexpected token Jest failed to parse a file. Jan 13, 2025 · The issue that package change-case has only ESM version (lates version code) and Jest has only experimental ESM support feature. This guide will help Dec 27, 2025 · The SyntaxError: Unexpected token export when using DeckGL with Jest is caused by a mismatch between DeckGL’s ES6 modules and Jest’s default CommonJS expectations. jsのプロジェクトを create-next-app で作成し、nanoidというライブラリをインストールしてJestでテストを実行したところ、SyntaxError: Unexpected token 'export' というエラーが出ました。 nanoidのimport部分を削除すると問題なくテストが実行 May 25, 2022 · Jest encountered an unexpected token Jest failed to parse a file. In this video I'll go through your question, pr 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. I tried every option with similar issues, but I can't get it to work. Jan 30, 2022 · Jest: SyntaxError: Unexpected token 'export' Ask Question Asked 4 years, 1 month ago Modified 4 years, 1 month ago Jun 28, 2019 · I'm want to test a component in a React app using Jest Enzyme with TypeScript. This keyword is a part of ECMAScript Modules (ESM) specification, which is the official standard way to reuse JavaScript code. Jan 5, 2019 · Issue : I am using ts-jest to test my typescript library. ts) files in Visual Studio 2022 but, getting "Uncaught SyntaxError: Unexpected token 'export" error. ts Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. js:284:10) at Object. There is a common approach to fix such issue. js file just for extra reference: Nov 4, 2021 · [Bug]: Unexpected token 'export' when Jest test imports d3 (7. component. js 进行前端开发时，可能会遇到这样的编译错误：Unexpected token ‘export’，这是因为默认情况下 Next. js's SWC-based transformer somehow doesn't support transpiling ESM packages in node_modules — even with transformIgnorePatterns is set. When I run jest, I get the following error: Jest encountered an unexpected token This usually means that you are trying to import a file wh Nov 9, 2022 · When I run my tests using Jest, I got an SyntaxError: Unexpected token ‘export’ from node_modules/@sendbird/chat/sendbird. Jan 10, 2017 · C:\study\reactodo\node_modules\react-icons\fa\angle-down. EnvInfo: Dec 28, 2022 · The problem is happening because jest now looks at the "browser" field in package. Jun 29, 2022 · Jest SyntaxError: Unexpected token 'export' from node module Ask Question Asked 3 years, 8 months ago Modified 10 months ago SyntaxError: Unexpected token export jest occurs when you try to export a module using the export keyword but the module does not have a default export. Nov 30, 2022 · Having the same issue. Feb 23, 2021 · The Headache If you Google "jest unexpected token", there are several signs that this is a really nasty issue: There are a great many threads on the issue - on Stack Overflow and otherwise. Default is no Sep 29, 2021 · Does this answer your question: Next. Jan 31, 2023 · Jest encountered an unexpected token Jest failed to parse a file. . Jun 27, 2023 · Introduction: Jest, a powerful testing framework for JavaScript and TypeScript projects, occasionally encounters unexpected token errors while parsing files. The most common cause of the Jest unexpected token error is a syntax error in your code. g. The Jest SyntaxError: Unexpected Token ‘export’ is caused when you try to export a module in a way that doesn’t conform to Jest’s expectations. Jest uses Babel to compile JavaScript ES Modules to CommonJS, using the @babel/plugin-transform-modules-commonjs Babel plugin. I've searched for simi Nov 25, 2020 · Jest: SyntaxError: Unexpected token export Asked 5 years, 2 months ago Modified 5 years, 2 months ago Viewed 15k times The Jest SyntaxError: Unexpected Token Export means that the JavaScript parser encountered an unexpected token when it was trying to parse your code. Recently, I added the lightbox. 1. This time I'm going to talk about a specific error: SyntaxError: Unexpected token 'export'. To fix this error, make sure that the module has a default export or use the export keyword with an object or function. js. ypzizbp nozx dku qdwqs veyxlp ivmc iwqxzc pikzsow nsyd mjrrfj