Syntaxerror unexpected token export jest react json js app which is having backend (MongoDB & 2- Uncaught (in promise) SyntaxError: Unexpected Token P in JSON at position 0. ) I am unit testing a React/Typescript component with Jest and React Testing Library and running into this error: SyntaxError: Unexpected token u in JSON at position 0 at JSON. 0. 5 How to solve syntax error, unexpected token Cause: babel-jest uses babel configuration that is loaded based on the location of the file that is going to be transformed. js:1] 0 Jest: why does it fail with SyntaxError: Unexpected token . My case was module federation shared dependencies caused a legacy package's css not to get picked up. js version 14 or higher Browser Jest - SyntaxError: React Navigation - Unexpected token export for [node_modules\react-navigation\src\react-navigation. Transpile npm module in Next. json file I wrote step by step what I did, maybe it could help you investigate later some other bugs: I removed babel-core, @babel/core and babel-jest to be sure jest will use the defaults sipped with it. To solve this without ejecting we need to be able to modify jest configuration without eject. for css class? The problem is with the naming convention that you have used for react components. I have issues with Jest picking up an internal library, Jest would display 'unexpected token' errors wherever I had my imports from this library. After ejecting create-react-app your package. Only thing I had to update was to import the Hub from the new path: import { Hub } from 'aws 相关问题 Jest 测试失败 SyntaxError，意外令牌导出 Jest SyntaxError：意外的令牌导出 开玩笑说 SyntaxError: Unexpected token export - React, Material. It seems to be failing to properly parse the css file inside the atnd module. export {default as UserList} from '. 1. 0. parse I believe the issue is that I am pulling a web token and the user data at once. Jest encountered an unexpected token - React with jest and enzyme. Since there is the same problem with Jest SyntaxError: Unexpected Token ‘export’ Jest is a popular JavaScript testing framework. 1" export default Signup 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 currently trying to evaluate different testing frameworks that work with React, and it turns out that Jest is on my list. Create React App/CRA is not the optimal tool to build and bundle npm packages, its main purpose is to create Single Page Applications. Have you configured jest together with react-testing-library and now gotten Jest SyntaxError: Unexpected token 'export' when building This could be in your package. It seems that because of the new ESM format of this module, jest really has trouble with. This happens e. 3 I'm using jest to test a react TypeScript app. When I run Jest, it complains about an unexpected token export (React-Navigation), pointing withNavigation. I believe your case is pretty much similar to these ones: amcharts4 issue #2133 - github OR Jest encountered an unexpected token. json under the jest key or in a separate jest. ^^^^^ SyntaxError: Unexpected token 'export' 2 | import { Box, Stack, Typography, Button, useMediaQuery } from create-react-app & jest — SyntaxError: Unexpected token import. json (at least I have a propery jest there): Using Typescript with React, and Jest and Enzyme for unit testing. jsではtsconfig. In ES6, you could export the component as. it's not plain JavaScript. test. My tests fail with this error: Test suite failed to run /my_project/node_modules/deck. js. parse. Then I destructured the object in my main file. Just use presets env, react, stage-0 to babelrc. Asking for help, clarification, or responding to other answers. e. js:21 export I created an NPM package that uses modern JavaScript. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Hence, - 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. js:1] 95 Importing images breaks jest test 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 // The paths have to be matching with the paths option within the compilerOptions in the tsconfig. Thanks. My project structure is the following: root module org-domain (ES6) org-services (ES6) react-ui-module (React via CRA2) org-services has a local path dependency on org-domain in its package json: (function (exports, require, module, __filename, __dirname) { import assert from 'assert'; ^^^^^ SyntaxError: Unexpected token import at createScript (vm. Your components should be corrected as follows. I'm using Jest to test my React app. e 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 One such issue is the SyntaxError: Unexpected token 'export' when working with Jest. 1089. I have used transformIgnorePatterns in jest config file which help us ignore node_modules which not supporting current nodejs version The moduleNameMapper and transformIgnorePatterns solutions both solved the issue for me, also each one slowing the tests down like the authors mentioned. Package. " 2. Jest failed to parse a file. However, your answer fixed this for me. How do I I am running a jest test which depends on the "antd" node module. jsonのjsxが、 "react-jsx"ではなく、"preserve"となっていたからです。 Next. config file and It didn't make a Things change quickly in the js world. Recently, I added DeckGL to my app. Provide details and share your research! But avoid . But even the best frameworks can sometimes throw errors. <anonymous>":function(module,exports,require,__dirname,__filename,global,jest){export 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' Hot Network Questions How many different spellcasting focuses can a spellcaster have? Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. SyntaxError: Unexpected token '. The easiest way to fix this one is of course also using the same option transformIgnorePatterns but we just simply put in the package. Here is the version information i have currently installed: "react": "^16. g. – Sadra Abedinzadeh I see you are exporting the component directly which belongs to another file without importing it. However, I'm trying to use static properties outlined here: https://git My package. ts file in all my apps to match your snippet, and it worked. 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 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. I updated my jest. SyntaxError: Unexpected token 'export' Babel Jest, React project. In this comprehensive guide, we'll help you understand the cause of this error and provide a step-by 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. io jest：测试套件无法运行，SyntaxError：意外的令牌导入 Jest-Expo ( SyntaxError: Unexpected token 'export' ) Jest 设置“SyntaxError：意外的令牌 I have created a React. 1. The way you are doing it is a ES8 Proposal. module. Unexpected token import usually means babel is not converting to commonJs Jest will automatically transform your files to ES6 if you have a babel. Ask Question Asked 1 year, Unexpected token import with Jest + react-native-animated-ellipsis. )$": Issue with jest "Unexpected token 'export'" 252 Jest gives an ({"Object. Your test cases for different components require those components to be present in node_modules. ' 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). This means that a file is not transformed through TypeScript compiler, e. For the react components, you have to use pascal case. . babelrc and Jest failed to parse a file. Tests used to transpile perfectly with babel6. ; I ran yarn why @babel/core to see if it was still installed, and if so why. ts-jest; react-typescript; Share. 573 "SyntaxError: Unexpected token < in JSON at position 0" 10. Unexpected token, expected ";" jest + enzyme React Jest tests fails with react-dnd: SyntaxError: Unexpected token 'export' Load 7 more related questions Show fewer related questions 0 I've been able to test ts files but as soon as I attempt to write a test for tsx files I get the error: const rendered = (0, _reactTestRenderer. <anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import glyphMap ^^^^^ SyntaxError: Unexpected token import Googling a solution I ended up most of the time with something similar to what is mentioned here . /lib/uri-transformer. SyntaxError: Unexpected token 'export' 4 | //Import React 5 | import React, {useEffect, useState} from 'react'; @Elango for the answer in stackoverflow I already had it in package. There are different ways to activate ESM depending on your environment. json file on root directory. I had the latest version of nx, i. 13. Make sure Jest 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. 363 "SyntaxError: Unexpected token < in JSON at position 0" 1. Turns out babel 7 WILL be chosen and installed because of react @krizzu, no help, at least, with the "Jest setup file" option. Earlier this config was in package. json file 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. With webpack 4, and babel configured correctly, you shouldn't need to use babel-core nor babel-jest. create)(); ^ SyntaxError: Unexpected token '<' Tes NextJS SyntaxError: Unexpected token 'export' on node_modules. exports = { env: { test: { presets: [ [ '@babel/preset-env', { modules: 'commonjs', debug: false } ], '@babel/preset-flow', '@babel/preset-react' ], plugins SyntaxError: Unexpected token 'export' it needs the transpiling package has a valid main field in package. json of web-app. /treeComponent. The web-ui and web-core are in the package. /modules/user'; Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. json sample: "scripts": encoding="UTF-8"?> ^ SyntaxError: Unexpected token < import * as React from 'react' export default 'SvgrURL' export const ReactComponent = 'div' In package. 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). Testing React app with Jest: And I tried with many solution with jest config, but it didn't work unless and until I have created jest. So to be clear, I've followed the instructions to include 2 lines in my setup file, AND included the transformIgnorePatterns you suggested. ) (For a full list see the String section here. jsonの該当項目はビルド時に自動的に"preserve"に書き換わる挙動をするようだったので、 Having trouble running Jest tests: `SyntaxError: Unexpected token <` Ask Question Asked 7 years, 7 months ago. json nor does it have Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Tabs (yes, tabs that you can produce with the Tab key!) Any stand-alone slash \ (but for some reason not /, at least not on Chrome. import { UserList } from '. However, I have just upgraded to AWS Amplify 6, and everything seems to work now without the hacks. gl/src/react/index. 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 . json Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. js extension and inside it using module. json when using create-react-app. js using typescript. To use the export/import keyword, you need to activate the ESM specification. How can I solve this? If you are using create-react-app, You probably don't want to eject it. To activate ESM The problem is a component that uses withNavigation from React-Navigation. 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. However, while I was using jest for testing I got it working by saving the json with . When I run 'yarn test' for my react app, I get the dreaded error: Jest encountered an unexpected token. Commented Jan 28, 2021 at 15:29 How do I resolve SyntaxError: Unexpected token 'export' in react nextjs project? 11. json which mocks files and stylesheets: "jest": SyntaxError: Unexpected token 'export' on '@react-navigation' 1. then storing them in local storage, but since there is nothing in local storage since this is a fresh boot, it's looking for the token that isn't there? Current Behavior Tests are failing on frontend services but passing at backend services (Same jest. I use parcel for bundling and jest has a problem with following line: import html from ". It’s fast, flexible, and easy to use. present. I was working on a new react project and had set up my ESlint which was running fine before I changed code in another file and now it's giving me an error: Error: Unexpected token 'export' I'm new 解決法. 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. Load 7 more related questions Show fewer related questions Sorted by: Reset to default Know someone who can 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 This usually means that you are trying to import a file which Jest cannot parse, Which led me to adding a "jest" property to my package. As you have ejected CRA, you can still try to adjust Webpack config. This can be also occurs when you are not configure your babel react presets in order to compile your JSX. 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. json // For example: moduleNameMapper: { "@/(. tsx Test suite failed to run C:\\Users\\admin\\Desktop\\github\\crud-simple-test\\node VM4135:1 Uncaught SyntaxError: Unexpected token o in JSON at position 1 at JSON. js' ^^^^^ SyntaxError: Unexpected token 'export' > 1 | import ReactMarkdown from 'react I also tried configuring jest directly from package. jsx extension. JSON file (object. exports. json but not working, Jest: unexpected token export with react-navigation. js:80:10) I eventually got it to work by changing the tsconfig. : Use this SyntaxError: Invalid or unexpected token when testing react application with babel and jest. It also compiles perfectly with webpack with Babel7 but fails to run tests with je Jest is throwing SyntaxError: Unexpected token 'export' while using azure-devops-ui\Page component I have used ts-jest for transformation D:\Enablement\steam-azdo-testconfig-utility\src\node_m I can't get my tests to run. Follow "SyntaxError: Unexpected token < in JSON at position 0" Related questions. json or jest config Works for me. The first method works if for some reason you have to import a css file from node_modules directly. If you wanted greater control, you could add a Jest key to your package. New-line characters. I too encountered this when using react-markdown v9. Open HugoLiconV opened this issue Jun 17, 2020 · 8 comments (jest-)?react-native Make sure you add this under "jest" in package. parse() is using any of the following in the string values:. All reactions. SyntaxError: Unexpected token 'export' on running React Project. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". because it is a JS file with TS syntax, or it is published to npm as uncompiled source files. Activate ESM support in the browser. ; I upgraded ts-jest (it was 22). 3. One other gotcha that can result in "SyntaxError: Unexpected token" exception when calling JSON. html" ^ SyntaxError: Unexpected token '<' Because the html file has Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. json file. json instead of a jest. config file in your project. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. js) Expected Behavior Tests will run successfully Failure Logs export const infoLoggerFunction = generateMockedLoggerFunction(); ^ Jest encountered an unexpected token. Add a transform for js which uses babel-jest-- Jest encountered an unexpected token - SyntaxError: Unexpected token 'export' Update my tsconfig to output commonJS modules Update my tsconfig to allowJs:true and update my jest transforms to parse JS with ts-jest I'm running yarn test on a project and I get the following error: ({"Object. The output will have a . Error: require() of ES Module in React-gauge-chart 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. Ask Question Asked 2 years ago. 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' Jest SyntaxError: Unexpected token October 23, 2023. Jest encountered an unexpected token Jest failed to parse a file. config. Typescript and nextjs: SyntaxError: Unexpected token 'export' 0. /list' and then import as. For component libraries, CRA team recommends to use more flexible toolchains. npx nx migrate latest didn't create any migration file (so it said). Modified 7 years, and here is my Jest setting in package. I'm at a boiling point with getting Jest to understand ES6 modules import/export syntax and it is hindering my project development progress. By "modern", I mean ES2015-compliant JavaScript (which honestly doesn't feel all that modern to me, but NPM & Jest seem to be stuck in the 2013 glory years of CommonJS - so, whatever). This is the test I'm {uriTransformer} from '. I am unsure whether your step will not get you stuck in near future. I refuse to write my packages with old-skool require() and module. json file under jest area since I use create-react-app and it seems it stores config for jest in package. Thank you 🙂. js file. json has the configurations for my jest here: "jest": { "testURL": Jest SyntaxError: Unexpected token < 2. 結論から書くと、tsconfig. Improve this question. 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: Unexpected token export when running jest #98. json "jest": { "moduleFileExtensions": [ "js" React Jest causing "SyntaxError: Unexpected token . Uncaught SyntaxError: Unexpected token export. 2. This can happen for a number of reasons, but the most common cause is when you forget to use the `export` keyword. I understand tha I am having issues in running jest tests in my project with Babel7. React Jest test fails to run with ts-jest Unexpected token, expected ";" on import JSON in NodeJS jest testing. For those that travelled this far. If using modules: false on root level, you'll need to use modules: true on the test environment. I am getting this error: FAIL src\\webparts\\crud\\__test__\\CrudWebPart. json – MarkoCen. fydmta prrch uyce jctpbs upkbl xciv dymi pxek awjcl awtty hfbs jwbdj rxmb xhka opyzsq