Syntaxerror unexpected token export jest vite. The threads span a number of years - meaning that the issue keeps cropping up for people repeatedly. I tried to add transformIgnorePatterns and moduleNameMapper to my … Jan 4, 2025 · Jest Syntaxerror: Unexpected Token ‚export‘ In my case, it was due to a project exporting ESM syntax via . Jul 14, 2023 · Jest encountered an unexpected token Jest failed to parse a file. js'; ^^^^^^ SyntaxError: Unexpected token 'export' 7 | RedirectRequest, 8 | } from '@azure/msal-browser' > 9 | import {MsalProvider} from '@azure/msal-react' | ^ 10 | 11 | // Config object to be passed to Msal on creation 12 | export const msalConfig: Configuration = { Jun 18, 2022 · This article documents the unit test execution exceptions and solutions after upgrading jest 28. js:1. 6ba19733. component. js. You can do this by adding the following code to the top of the file: Jun 29, 2022 · Jest SyntaxError: Unexpected token 'export' from node module Ask Question Asked 3 years, 8 months ago Modified 10 months ago Jan 8, 2026 · 上一篇： vue3+ts+vitejs单元测试报错：‘vue-cli-service‘ 不是内部或外部命令，也不是可运行的程序或批处理文件。 下一篇： vue单元测试SyntaxError: Unexpected token ‘export‘ Jul 7, 2021 · Current Behavior On a newly generated Nx project (React), after generating a library and importing lodash-es in its component, when trying to run the tests I get the error: Jest encountered an unexpected token This usually means that you 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 '. This error can be frustrating, especially for those new to TypeScript and Jest. /MsalContext. 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. Jest encountered an unexpected token Jest failed to parse a file. Jul 1, 2024 · In certain scenarios, we might face issues when attempting to run Jest with ECMAScript Modules (ESM), particularly with packages like react-markdown that are bundled as ESM. However, you may encounter the error unexpected token 'export' when using Jest. So, I had to test this new version in a personal project to learn how to May 25, 2022 · [Solved] SyntaxError: Unexpected token ‘. 5k 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 Nov 19, 2021 · gsedlacz mentioned this on Jan 4, 2022 Vue3 "SyntaxError: Unexpected token 'export'" on import of js-vue file inside of ts-vue file #435 The jest unexpected token export error is a common error that can be caused by a variety of factors. May 5, 2022 · My production build is failing to load with an error: Uncaught SyntaxError: Unexpected token 'export' (at index. Jun 9, 2023 · SyntaxError: Unexpected token 'export' #13477 Closed as not planned ThinhVu opened on Jun 9, 2023 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. This happens e. 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 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. - microsoft/fluentui Dec 26, 2023 · export { MsalConsumer, MsalContext } from '. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". Jan 22, 2022 · Jest encountered an unexpected token Jest failed to parse a file. This document covers known issues and common problems encountered when migrating from Material UI v4 to v5. 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. Oct 27, 2022 · Uncaught SyntaxError: Unexpected token 'export' Notifications You must be signed in to change notification settings Fork 7. Jan 5, 2019 · Issue : I am using ts-jest to test my typescript library. For example, this preset fixes SyntaxError: Unexpected token 'export', which may occur in your tests. 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. ts) files in Visual Studio 2022 but, getting "Uncaught SyntaxError: Unexpected token 'export" error. Jun 30, 2023 · Jest encountered an unexpected token Jest failed to parse a file. 1) jestjs/jest#12036 (comment) and it worked immediately. Mar 22, 2023 · Jest encountered an unexpected token Jest failed to parse a file. 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. 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. 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. May 3, 2022 · Version 28. js:265:26574). So, you run a test suite, but you encounter an unexpected token, Jest fails, or you get a syntax error: "Cannot use import statement outside a module. . js solved it: Aug 11, 2022 · Vite — How to Fix „Uncaught SyntaxError: Unexpected token 'export‘“ by Marcus Pöhls on August 11 2022, tagged in Vite, JavaScript , 2 min read Oct 19, 2025 · When working with TypeScript projects and using Jest as the testing framework, developers often encounter the SyntaxError: Unexpected token 'export' error. component Sep 30, 2024 · A comparison of Jest and Vitest in terms of their features, performance, and developer experience to help you decide which JavaScript testing framework is best for your use case. Component { ^^^^^^ SyntaxError: Unexpected token export at transformAndBuildScript (node_modules\jest-runtime\build\transform. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration. This advice to add this to jest. exports` object to the file that you’re trying to export from. js Apps Problem: Running into the following error when trying to run unit tests for a Next. export {Markdown as default, defaultUrlTransform} from '. The SyntaxError Unexpected Token export Jest error is a common error that occurs when you try to export a value from a JavaScript module using the export statement. js and Jest interpreting that as CommonJS, despite following all the guides to overwrite transformIgnorePatterns. Here's what you can do: Feb 27, 2023 · Jest encountered an unexpected token Jest failed to parse a file. 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. Jul 11, 2016 · Thank you! I tried the above (Export and ES6) with TypeScript (. babelrc and some dependencies, moduleNameMapper and transformIgnorePatterns in jest. Luckily, Angular already has enough information in its docs to achieve this. Jest, by default, treats code as CommonJS, not recognizing import statements. This keyword is a part of ECMAScript Modules (ESM) specification, which is the official standard way to reuse JavaScript code. " I'm unsure about what is causing this error and how to resolve it. Jan 30, 2022 · Jest: SyntaxError: Unexpected token 'export' Ask Question Asked 4 years, 1 month ago Modified 4 years, 1 month ago May 17, 2020 · the first error SyntaxError: Unexpected token 'export' seems to be a babel problem, but if i add @apollo/client to my transformIgnorePatterns, i get a TypeError (see Actual outcome). <anonymous> (src\components\category-tree\category-tree. Oct 21, 2022 · [REACT] Getting SyntaxError: Unexpected token 'export' when running Bryntum Gantt React in my application 3 posts • Page 1 of 1 rtbennett | 50 posts Apr 4, 2023 · I'm trying to create a production build of my React application with Vite. it's not plain JavaScript. I tried putting the library in the public folder but it still doesn't work, vite adds import { injectQuery as __vite__injectQuery } from "/@vite/client"; to the file header and causes this error: Uncaught SyntaxError: Cannot use import statement outside a module Mar 2, 2024 · To solve the "Uncaught SyntaxError Unexpected token 'export'" error, set the `type` of your `<script />` tags to `module`. Trying to test a file where I import uuid results with an error: Test suite failed to run SyntaxError: The requested module 'uuid' does not provide an export named 'v1' at async Promise. Mar 2, 2024 · To solve the "Uncaught SyntaxError Unexpected token 'export'" error, set the `type` of your `<script />` tags to `module`. Sep 16, 2022 · Jest encountered an unexpected token Jest failed to parse a file. May 9, 2024 · Jest encountered an unexpected token Jest failed to parse a file. Did anyone else come across this issue? Jan 10, 2017 · C:\study\reactodo\node_modules\react-icons\fa\angle-down. test. 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. As a result, it is common that developers encounter SyntaxError: Unexpected token 'export'. g. all (index Jul 16, 2020 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. <anonymous> (src\components\category\category. This error can occur for a variety of reasons, but it is usually caused by a syntax error in your code. /core/core. Jun 29, 2022 · 13 I'm trying to create a production build of my React application with Vite. May 7, 2025 · Jest encountered an unexpected token Jest failed to parse a file. But Angular’s own support for Vitest is the new thing, so I had to learn how to use it. Here's what you can do: • To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in Jun 19, 2025 · There has been Vitest support for Angular for a while, thanks to Analog and its plugin, which I also tried when Angular 18 came out, and it works just fine. Sep 29, 2023 · mui-x/charts error: SyntaxError: Unexpected token 'export' Ask Question Asked 2 years, 5 months ago Modified 1 year, 9 months ago Jan 13, 2023 · Jest encountered an unexpected token Jest failed to parse a file. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. By following the tips in this article, you can help to prevent this error from occurring in your own code. ’ Jest Error for Next. js application using the jest … Aug 13, 2025 · JS source uses ECMAScript modules (import, export default) in JS files. May 19, 2023 · The error message I'm receiving is "Uncaught SyntaxError: Unexpected token 'export' (at bundle. Sep 6, 2023 · It is common that 3rd part lib use import ES Module in CommonJS package. I had the exact same problem when using jest with vite+swc and a component using the d3 library (d3-array and d3-shape was having a problem). 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 Jun 16, 2018 · Fluent UI web represents a collection of utilities, React components, and web components for building web applications. Because the uuid library I upgraded now did not pre-compile its ES modules, I had to transpile it. This can happen for a number of reasons, but the most common cause is when you forget to use the `export` keyword. Here's what you can do: • To have some of your "node_modules" files transformed, you can 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: 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. Here's what you can: In your tsconfig, add { "compilerOptions": { "allowJs": true } } In your Jest configuration, add the ts-jest transformer: Dec 4, 2021 · For some reason I guess this cjs is not recognized with the recommended jest config. config. The Jest SyntaxError: Unexpected Token Export means that the JavaScript parser encountered an unexpected token when it was trying to parse your code. As far as I can tell that package has the correct exports for use with jsdom like we FAIL src/index. js:5 export default class FaAngleDown extends React. 0. 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 Jan 30, 2022 · Jest: SyntaxError: Unexpected token 'export' Ask Question Asked 4 years, 1 month ago Modified 4 years, 1 month ago 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. js:284:10) at Object. /lib/index. js:130367:1) Looking at the generated file, this line refers to: export { $3 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 . Many of the threads are long. js:2:44) at Object. May 13, 2022 · To ensure the compatibility of your tests, you must use our configuration preset when testing our components with Jest. Nov 4, 2021 · [Bug]: Unexpected token 'export' when Jest test imports d3 (7. May 14, 2020 · Hi, I'm using jest to test my project. Sep 19, 2023 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Reproduction System Info Jan 22, 2022 · Jest encountered an unexpected token Jest failed to parse a file. js'; ^^^^^^ SyntaxError: Unexpected t Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. " Nov 28, 2022 · When I run my tests using Jest, I got an SyntaxError: Unexpected token ‘export’ from node_modules/@sendbird/chat/sendbird. I wander it there any way to avoid this problem. Jest uses Babel to compile JavaScript ES Modules to CommonJS, using the @babel/plugin-transform-modules-commonjs Babel plugin. Jan 14, 2021 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. Jest unexpected token 'export': How to fix Jest is a popular JavaScript testing framework. This might be a simple typo. To get around it, can directly import the specific exports directly from esm files in the @apollo/client package like this: May 19, 2023 · The error message I'm receiving is "Uncaught SyntaxError: Unexpected token 'export' (at bundle. 1) #12036 Jan 4, 2022 · Jest encountered an unexpected token Jest failed to parse a file. Here's what you can do: Jun 18, 2021 · Jest encountered an unexpected token Jest failed to parse a file. This is the recommended solution in bullet number 3. js' ^^^^^^ SyntaxError: Unexpected token 'export' > 1 | import ReactMarkdown from 'react-markdown'; | ^ How to get Panda to work with Jest? If you run into error messages like SyntaxError: Unexpected token 'export' when running Jest tests. For integration instructions, see the package readme . Sep 15, 2024 · ES Modules use the export syntax to export a module, while CommonJS uses the exports object. Mar 1, 2022 · And I think the latter solution would work for this case. Oct 17, 2022 · Unable to build project with vite, catching error unexpected token #10500 Answered by mkhoussid mkhoussid asked this question in Q&A Apr 22, 2022 · Jest SyntaxError: Unexpected token 'export' #3443 Open david-wb opened on Apr 21, 2022 To fix the SyntaxError: Unexpected token export jest error, you need to add the `module. Default is no Jul 10, 2022 · Solution I tested this solution locally: [Bug]: Unexpected token 'export' when Jest test imports d3 (7. 1. msginlb zqi ufqp ougsjjq yiqo xojtwqb ywyc ygq pdnlki hdlng