Syntaxerror unexpected token export jest typescript react This error occurs Jest encountered an unexpected token. Expected behavior I'm getting SyntaxError: Unexpected token 'export' on some node_modules, which are not transpiled (I guess?). npx nx migrate latest didn't create any migration file (so it said). This means, that a file is not transformed through TypeScript compiler, e. Prerequisites I confirm my issue is not in the opened issues I confirm the Frequently Asked Questions didn't contain the answer to my issue Environment check I'm using the latest msw version I'm using Node. You signed in with another tab or window. You switched accounts on another tab or window. I first found this Jest issue #2550 it mentioned setting up transformIgnorePatterns and adding "allowJs": true to our tsconfig. "jsx": "react-native" Same as the "preserve" option, but the output will have a . svg') data-jest-svg-name: Only the name portion of the file (e. 10. To add support for other extensions you need to write custom transformers. ts' , it should be node . Cant export classes/anything in typescript - unexpected token I'm trying to run unit tests for a TypeScript project which uses another TypeScript project I've created as a dependency. Asking for help, clarification, or responding to other answers. When I try running tests for any component that uses react-markdown I get some issues here Jest encountered an unexpected token Jest failed to parse a file. 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 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 I'm trying to run a test for a personal website done in create-react-app. My case was module federation shared dependencies caused a legacy package's css not to get picked up. when your code or its dependencies use non-standard SyntaxError: Unexpected token 'export' The issue started when updating Jest from 26. to set type to module on your JS script tags in the browser. SyntaxError: Invalid or unexpected token when testing react application with babel and jest. js'; ^^^^^ SyntaxError: Unexpected token 'export' 7 | 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. Improve this question. Thank you 🙂. JEST - unexpected token import while running test. 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 encountered an unexpected token. 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'. The project builds like it should so I find myself wondering if we ever needed those lines. My jest. These errors can occur due to 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 I'm running yarn test on a project and I get the following error: ({"Object. So the final fix was: Update the imports Jest encountered an unexpected token. Here's what you can do. 5k 6 6 SyntaxError: Unexpected token 'export' Load 7 more related questions Show fewer related questions Sorted by: Reset to This could be a temporary workaround until babel configs are fixed. TS react Jest SyntaxError: Unexpected token '<' Ask Question Asked 1 year, 9 months ago. js:1] 95 Importing images breaks jest test Some react-native libraries ship uncompiled ES6 code. Then you need to create one configuration file with name . 3. js:1] 0 Cannot use import statement outside a module with date-fns in Jest after updating to Angular 13 Tagged with jest, testing, react, javascript. You will need to tell Jest to compile react-navigation-tabs by whitelisting it in the transformIgnorePatterns option in Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. I have a test Jest encountered an unexpected token React. 23 November 2022. Jest: Test suite failed to run, Unexpected token = 4. In this article, we will discuss the possible Issue : First of all, I’m not sure if this is a ts-jest issue or not, so sorry if I’m not reporting this in the proper place. Troubleshooting Javax. Tip! Mock jsdom location with Jest # javascript I ran into a similar situation where I wanted to test a React component . I'll look into this more. 6. Would someone be able to share a working config for Jest or help me out in any other way? SyntaxError: Unexpected token export. So to be clear, I've followed the instructions to include 2 lines in my setup file, AND included the transformIgnorePatterns you suggested. Jest (typescript): SyntaxError: Unexpected token 'export' (lowdb) 0. 22. Marcus, a seasoned developer, brought a rich background in developing both B2B and consumer software for a diverse range of organizations, including hedge funds and web agencies. Thank you! I'm assuming the reason this works is because it's working around the build-time loader and using an ES6 friendly loader, next/dynamic. Modified 2 years, Typescript : SyntaxError: Unexpected token 'export' 3. 1. Don't listen to past me, past me was 2 weeks into this problem and couldn't think straight. js (I tried to get jest to ignore sendbird, but to no avail): Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Stack Overflow. While running tests using Jest, an error occurred due to an unexpected token 'export' in the 'react-markdown' package. 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 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. json nor does it have 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 Having trouble running Jest tests: `SyntaxError: Unexpected token <` 5. Running with jest and react-testing-library. React Jest - Unexpected token import. js file Sentry Answers > React > Jest encountered an unexpected token - SyntaxError: Unexpected token 'export' from '. Webpack fails to parse typescript files. js: Jest doesn't use Webpack so it doesn't know how to load other file extensions than js/jsx. json for jsdom. 3 to 27. Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Share. 252 Jest gives an error: "SyntaxError: Unexpected token export" 1 Cannot use import statement outside a module - jest + nextj. Unexpected token 'export' in lodash-es. Jest test fails SyntaxError, unexpected token Export Hot Network Questions Unual firmware update = dmesg: "microcode: microcode updated early to revision 0xf8, date = 2023-09-28" Jest encountered an unexpected token. SyntaxError: Unexpected token 'export' I was using jest 27, which works fine now. SyntaxError: Unexpected token 'export' Babel Jest, React project. I worked around this by adding these modules to the transformIgnorePatters in my Jest config, but this doesn't seem like the way to go. mui-x/charts error: In my case it was failing because I did not set properly the typescript support for Jest. 1. This time I'm going to talk about a specific error: SyntaxError: Unexpected token 'export'. It seemed no amount of configuring did the trick until I started expanding on Fernanda Duarte's answer, using some inspiration from another answer (that I can't find right now, apologies to its author). The output will have a . I removed them and the tests began passing. Fix "Jest encountered an unexpected token" with "create-react-app" # jest # testing # react # javascript. This did not work, what did solve it in the end was adding the following to our jest. e. Modified 1 year, reactjs; typescript; jestjs; Share. This happens e. js:1] 95 Importing images breaks jest test 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. The answer was in my . Internally, preact provides a "browser" field, but the file is ESM, which jest does not natively support without a babel transform. ES6 code needs to be compiled before it can be run by Jest. Follow Typescript : SyntaxError: Unexpected token 'export' 0. In ES6, you could export the component as. 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 . : Use this when you're using babel-jest to transpile your tsx (or jsx) files. 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 - SyntaxError: React Navigation - Unexpected token export for [node_modules\react-navigation\src\react-navigation. The problem is happening because jest now looks at the "browser" field in package. js'; ^^^^^ 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. However, your answer fixed this for me. I updated my jest. babelrc. js-react module but is throwing different import/export unexpected token errors during the t Because NODE_PATH doesn't work in Typescript, I believe this is the only way to do absolute imports in create-react-app-typescript. This usually means that you are trying to import a file which Jest cannot parse, e. js, and the last one was close but I was still missing one important thing the imports. Jest - SyntaxError: React Navigation - Unexpected token export for [node_modules\react-navigation\src\react-navigation. g. json probably contains: "babel": { "presets": [ "react-app" ] } which makes import/export statements work for your files, but @amcharts/amcharts4 does not have that setting in its package. Weirdly this may be somehow related to using enums? See the reproducible demo below. For anyone using create-react-app, only certain jest configurations can be changed in package. . ^^^^^ SyntaxError: Unexpected token 'export' 2 | import { Box, Stack, Typography, Button, useMediaQuery } from "@mui/material"; 3 reactjs; typescript; jestjs; ts-jest; Share. Reload to refresh your session. 1089. Provide details and share your research! But avoid . io. This means that a file is not transformed through TypeScript compiler, e. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. jsx extension. babelrc in your project's root directory and add this code there. I am trying to get started building a site in ReactJS. /lib/uri-transformer. js:. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". 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. I was using Babel with Webpack. js version 14 or higher Browser So I'm trying to write tests on my React Native app with Jest and TypeScript. config. export {default as UserList} from '. I had an issue in which my unit tests were running just fine on my machine but failing on jenkins, your solution caused jest to give me a warning saying that globals are deprecated and then the tests took forever, I removed the globals and ended up with: export default { displayName: 'my-lib', This ended up helping me import @microsoft/mgt-react into a Next Js v12 project. I finally found a workaround for this. I managed to solve it by installing the below presets and having the babel configuration file as follows: I see you are exporting the component directly which belongs to another file without importing it. How to resolve "Cannot use import statement outside a module" from Jest when running tests? Hot Network Questions SyntaxError: Unexpected token 'export' in Nodejs project with Typescript and Webpack. <anonymous>":function(module,exports,require,__dirname,__filename,global,jest){export Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Follow asked Feb 19, 2022 at 5:35. Not one bit. js . SSLHandshakeException: Received Fatal Alert - Bad_Certificate I had the latest version of nx, i. Currently, I’m migrating a react project Typescript but to do it as fast as possible and avoid more problems I’m leaving the tests in javascript but when I try to run the tests in my project, jest throws this exception: To solve the "SyntaxError: Unexpected token 'export'" error, make sure: to set type to module in your package. SiddAjmera SiddAjmera. I wrote a book in which I share everything I know Hi redwood community! I am trying to use react-markdown in a new redwood 4. It seems that because of the new ESM format of this module, jest really has trouble with. And Jest doesn't like it. Reactjs npm module. 2. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. About; Jest says SyntaxError: Unexpected token export - React, Material. import { UserList } from '. /modules/user'; Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. # typescript # frontend # react. Module parse failed: Unexpected token Jest test fails SyntaxError, unexpected token Export. 0. After ejecting create-react-app your package. /MsalContext. The Error; Default is no compilation; Adjust Transformation Configuration from '. js. How do I conditionally add attributes to React components? 9. I see the problem in jest 28 and above. Noe that changes the handling of any *. However, I am seeing jest tests choke when using such imports with SyntaxError: Unexpected token export errors. Jest encountered an unexpected token This usually means that you are trying to import a Skip to main content. This causes node to handle *. ts file in all my apps to match your snippet, and it worked. com Jest SyntaxError: Unexpected token 'export' Apr 22, 2022 Copy link tyler-dane commented Apr 22, 2022 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 @krizzu, no help, at least, with the "Jest setup file" option. Marcus Greenwood Hatch, established in 2011 by Marcus Greenwood, has evolved significantly over the years. – Sadra Abedinzadeh Try setting ""type": "module"," in you package. Jest encountered an unexpected token - SyntaxError: Unexpected token 'export' 3. Ask Question Asked 5 years, 2 months ago. I first found this Jest issue #2550 it mentioned setting up transformIgnorePatterns 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. I tried a Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. 34. npm install --save-dev @babel/core @babel/preset-env. ssl. js files of the current package, if you want to mix EsModule david-wb changed the title Jest SyntaxError: Unexpected token 'export' site:stackoverflow. If you are getting same problem. The issue started when updating Jest from 26. Jest cannot seem to parse the dependency because its public api file includes "export" keywords. I too encountered this when using react-markdown v9. 3. exports = { env: { test: { presets: [ [ '@babel/preset-env', { modules: 'commonjs', debug: false } ], '@babel/preset-flow', '@babel/preset-react' ], plugins data-jest-file-name: The name of the file (e. Felix Kling had it right, I needed the babel preset (@babel/preset-typescript) in my . However, when I tried to put my JS in a separate file, I started getting this error: "Uncaught SyntaxError: Unexpected token &lt;". net. msal react typescript jest tests are failing #6788. I tried different things, like play around with . Table of Contents. The way you are doing it is a ES8 Proposal. 6. babelrc and some dependencies, moduleNameMapper and transformIgnorePatterns in jest. Two lines defining import plugins specifically for @material-ui. it's not plain JavaScript. 'some-image') data-testid: Same as data-jest-svg-name, but works with @testing-library/react getByTestId() So if you want to find the rendered element in your test by attribute you have to pass in some other attributes. json. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring Error Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Recently, I added the lightbox. js file with jest, but it was failing because the component imported a . json file in Node. 3 project with typescript. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration. Introduction: Jest, a powerful testing framework for JavaScript and TypeScript projects, occasionally encounters unexpected token errors while parsing files. Jest failed to parse a file. when your code or its dependencies use non-standard JavaScript Jest failed to parse a file. 0. because it is a JS file with TS syntax, or it is published to npm as uncompiled source files. Closed ranshine opened this issue Dec 26, 2023 · 6 comments Closed MsalContext } from '. As per the accepted answer @sdgluck, I had to add a babel. Viewed 1k times 4 . Jest encountered an unexpected token Jest failed to parse a file. { "presets": ["@babel/preset Jest (typescript): SyntaxError: Unexpected token 'export' (lowdb) Ask Question Asked 2 years, -- Jest setup "SyntaxError: Unexpected token export" Add a transform for js which uses babel-jest-- Jest encountered an unexpected token - SyntaxError: Unexpected Jest says SyntaxError: Unexpected token export - React, Material. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. js files as EsModule files, instead of as CommonJS files. For those that travelled this far. The Jest doc about Testing React Native Apps includes a section about compiling dependencies that don't ship pre-compiled code. 39. Jest Unexpected Token in TypeScript. However, despite following dozens of how-tos and tutorials, I am not able to fix the issue below. /list' and then import as. How to solve SyntaxError: Cannot use import implementing Magic with NextJS in a Typescript setup? 2 Typescript and nextjs: SyntaxError: Unexpected token 'export' Jest - SyntaxError: React Navigation - Unexpected token export for [node_modules\react-navigation\src\react-navigation. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is 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 Issue with jest "Unexpected token 'export'" Related questions. Improve this answer. js' ^^^^^ SyntaxError: Unexpected token 'export' > 1 | import ReactMarkdown from 'react-markdown'; If your project uses TypeScript, Jest transforms your TypeScript files to JavaScript using the babel-jest I believe your case is pretty much similar to these ones: amcharts4 issue #2133 - github OR Jest encountered an unexpected token. The "issue" is that Jest only wants to process CommonJS-style code. 0 Jest encountered an Typescript and nextjs: SyntaxError: Unexpected token 'export' 0. Follow Jest gives an error: "SyntaxError: Unexpected token export" 1089 I have a problem with the unit tests of my React project, it is configured to be compiled with webpack, however when executing the unit tests they are giving me this error: SyntaxError: Unexpected token 'export' This is my jest. May be you are doing 'node . You signed out in another tab or window. Cause: babel-jest uses babel configuration that is loaded based on the location of the file that is going to be transformed. While using old babel version everything worked fine, but because of some project problems we had to upgrade babel to 7 Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. The first method works if for some reason you have to import a css file from node_modules directly. Modified 2 years, 5 months ago. So for the Jest tests to run, it first needs to be transpiled by Babel. js extension. json when using create-react-app. 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 Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. 'some-image. Ask Question Asked 2 years, 5 months ago. css stylesheet. /v1. Jest SyntaxError: Unexpected token < 416. Jest I am having the same issue. js:1] 5 TypeScript Property 'navigation' is missing in type but required in type 'Props' React Native 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 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). eepz ghrrpuf ssqnp jlbzy fnfjia yqwog lmdh nfrm akvuh vfvn zrb hamvywu qojx zxrsz pharsjw