React unexpected token export react js main}> Fix the common Uncaught SyntaxError: Unexpected Token < in React with our step-by-step guide. css'; const Header = => { return ( <header className={styles. Any ideas as to what is going wrong? 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. json, I've removed irrelevant lines): 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. (react uncaught syntaxerror: unexpected token <) . exports. This is full method componentDidMount: function () { var Jest encountered an unexpected token This usually means that you are trying to import a Skip to main content. /jsonServer'; export * from 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 The export keyword is an additional JavaScript syntax that’s not supported by default. 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). When it sees those parentheses it is expecting an expression. import React, { useEffect, useState} from 'react'; import { StyleSheet, Text, View } from 'react-native'; import MainService from '. Check if you have babel-preset-react package installed and that you have react added into list of presets either into {"babel":{"presets":[]}} list inside package. I'm trying out the code from egghead. The problem is a component that uses withNavigation from React-Navigation. js Syntax error: Unexpected token, expected ; (1:20) > 1 | export default from '. But the change that I believe caused the issue was in 2. 46. However, when I tried to put my JS in a separate file, I started getting this error: "Uncaught SyntaxError: Unexpected token <". I tried to use react-native-material-ui but got an "Unexpected token export" I couldn't tell anything wrong with the statementall the references are correct and the code format is correct too H i am just starting with Reactjs and was writing a simple component to display li tag and came across this error: Unexpected token '&lt;' I have put the example at 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 When trying to run node with Babel and react, @babel/register does not work I looked at similar issues on SO, reinstalled node 10. js: Unexpected token 'e 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 Visit the blog // ⛔️ Uncaught SyntaxError: Unexpected token 'export' export class Person {constructor (first) {this. I am new to ReactJS. /arc. { "presets": ["@babel/preset This problem occurs because you are trying to use the same file as the service worker you are registering it with. Unless you run Babel or Webpack to build your project, a vanilla Express project commonly uses the CommonJS syntax, so the export keyword is not supported. npm install --save-dev @babel/core @babel/preset-env. Name *. If I run npm install, I'll get the library under node_modules. Here's what you can do: • To have some of your "node_modules" files I am unsure whether your step will not get you stuck in near future. As you have ejected CRA, you can still try to adjust Webpack config. 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 Cause: babel-jest uses babel configuration that is loaded based on the location of the file that is going to be transformed. 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 a React app - Here is my code: NewsContext. /style. js Syntax error: Unexpected token (48:9) 46 | 47 | > 48 | export default PokedexSelector; | ^ 49 | This doesn't make any sense to me as I have tried changing many things in the code and looking for missing curly braces etc but cannot identify the source of trouble. Viewed 35k times 1 . I have tried with some tutorials but it shows I'm having a problem with my Expo project. js import React, { createContext, useEffect, useState } from "react"; import axios from 'axios' export const NewsContext = createContex . Unexpected token ’export’ when running Next. Your components should be corrected as follows. kjrocker opened this issue Sep 16, 2022 · 14 comments Assignees. Actually, it's a dynamic page, I am working it with API that's working fine but I want to search in dynamically. Viewed 16k times 1 . js Module build i create the reactjs app, test and compile it with webpack, it is fully functional and every thing is okay, once i need to make a production build it compiled successfully and dist folder created, Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. js:21 export {d I'm still confused as to why this caused my Unexpected token 'export' errors to go away since the testEnvironment property is set to node by default according to the docs. This is my project structue Project |--index. I am posting this in a hope help others incase if they reach this far and still have not found a fix. src/GamesList. /simple'; export jsonServerRestClient from '. But I believe the syntax is correct. 12. If you want to return undefined there, that can work (I use it with return early patterns all the time), just don’t use parentheses unless there is a valid expression inside. . json to use the ES6 module, and previously it was using the UMD module. 1 of CountUp (you can pin at 2. Since there is the same problem with other third-party libraries (such as Native Base), I concluded there must be a Jest encountered an unexpected token "export" in React #12046. html 305 bytes [emitted] [0] multi A lot of node modules export ES5 so that jest can run it out of the box without transform. The project builds like it should so I find myself wondering if we ever needed those lines. This can be also occurs when you are not configure your babel react presets in order to compile your JSX. outdated scope: testing Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. import React, {Fragment} from 'react'; import Header from '. js Exploring the causes and solutions for unexpected token export errors when running Jest tests in a Create-React-App project, particularly after adding a third-party React 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. json or into . js:76:16) . 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. babelrc. 2025-02-05 by Try Catch Debug 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 Yeah, I think it’s a JS problem. js I got the following error:(function (exports, require, module, __filename, __dirname) { import React from 'react'; SyntaxError: Unexpected token import at Object. If I go return;, it works fine. About; Products OverflowAI; 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; Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Before directing me to . js component based on the relative path like so Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. For the react components, you have to use pascal case. I am also using Firebase for authentication and Firestore for storag I am using the our own library for API calls. it 's not plain JavaScript. js:1] 5 TypeScript Property 'navigation' is missing in type but required in type 'Props' React Native Thanks, exactly what I was missing in my config. jso React functions (functional components) have no constructor, nor this, they are instanceless. Improve this question. I will be interested to know if this helps anyone else with this issue or Jest encountered an unexpected token. js:1] 3 SyntaxError: Unexpected token import with Jest + react-native-animated-ellipsis Jest - SyntaxError: React Navigation - Unexpected token export for [node_modules\react-navigation\src\react-navigation. /Component' export default Component is there any problem with my first index. config. js"} SyntaxError: Unexpected token 'export' I have tried updating my jest. . By default, if Jest sees a Babel config, I am trying to get started building a site in ReactJS. - React and Typscript with Jest and React-testing-Library E:\Git\node_modules@mui\x-date-pickers\internals\demo\index. js file Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. /src/styles into the build command. js:6 Uncaught SyntaxError: Unexpected token < At first sight one would say that the browser cannot interpret the syntax but isn't this supposed to be pure ES5 syntax? I would like to keep my application simple and not start using a tool like Babel. html |--package. 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 try using Fragment which came from the React library. I'm new to ReactJS. Email *. The problem is, I want to set an index as key for every object in the list. Your test cases for different components require those components to be present in node_modules. For component libraries, CRA team recommends to use more flexible toolchains. import React, { Component } from 'react'; class Auth extends Component { constructor() Jest encountered an unexpected token. I have tried several I'm using Jest to test my React app. DOM */ to the top of the JS file, but it didn't fix anything. I have the words in an array and i can apply map on it. You can use the useState and useEffect hooks to provide state and a sense of component lifecycle functions. io and I keep getting the following error: Uncaught SyntaxError: Unexpected token import I have loaded babel twice now and have followed a Trying to get jest test to work for React project. <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. Looks like Babel can't understand JSX syntax. Node 14. json which combines all of our I am trying to make CSS Modules work with React components. I'm create new react class and define some routes in componentDidMount method. Modified 5 years, 6 months ago. config and changing the transformIgnorePatterns but not having any success Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. js:1 ({"Object. Abstract: Exploring the causes and solutions for unexpected token export errors when running Jest tests in a Create-React-App project, particularly after adding a third-party React module like lightbox. Maybe I started with NextJS, before that I used React a lot. js. /Component' | ^ 2 | but if i write code component/index. json file To solve the error, set the type property to module in your package. import React from "react" const Cards = => { //Helper functions here return ( //Jsx here ) } export default Cards And then you can now import this component in your App. You signed in with another tab or window. 6. Your babel presets configuration should look like (in a case of package. It seems that because of the new ESM format of this module, jest really has trouble with. Then you need to create one configuration file with name . 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. For Typescript it doesn't setup one, rather consuming the tsserver directly. Currently, I'm migrating a react project Typescript but to do it as fast as possible and avoid more problems I' After spending two days in researching, I've finally run out of ideas. 0. /src there are server, two react entry points (one for client and one for admin) and styles, so I've also added --ignore . /src/component/index. import Component from '. Now I i I am getting the Unexpected Token on my ReactJS application. js:1] 18 Jest encountered an unexpected token with react-native Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. 1, upgraded to latest version 11. Because of this, the browser cannot figure out which service worker features you need. that's why by default jest doesn't transform node_modules. 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 Skip to main content. 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. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; I am trying to test my application. Btw, renderNumbers was defined twice, although it's legal and not the cause of the problem. js 289 bytes 0 [emitted] main index. Fragment> <button className="square">X</button> </React. My tests fail with this error: Test suite failed to run /my_project/node_modules/deck. Modified 8 years, 4 months ago. 1. Fragment> ); } The LSP for JavaScript should be setup by default. After this, export of modules will work in the following way from index. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with One possible fix for this issue in Webpack version 5. Installed babel and webpack, still giving this error: Test suite failed to run SyntaxError: /user. 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. it's not plain JavaScript. Two lines defining import plugins specifically for @material-ui. Reload to refresh your session. as mentioned in the question's comments, it's an issue with your babel plugin version. Recently, I added DeckGL to my app. My test suits run with no errors until I install this package: fir You signed in with another tab or window. My code is as follows: import styles from '. /Header'; const Layout = (props) => { return( <Fragment> Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. babelrc, note that I have added BOTH es2015 and react (to be sure, but there's no react here). I have a react component and i am trying to render a list of string words inside it. first = first;}} # Set the type property to module in your package. Here are the relevant React: Unexpected token, expected (Ask Question Asked 8 years, 4 months ago. 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 newbie to Reactjs and webpack. I've seen multiple similar issues and it seems character-rolling. x. Here is the component: 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. I removed them and the tests began passing. /reducers/games'; export default function GamesList({games}) => { const emptyMessage = ( <p>There are I'm trying to write router component for my react app. babelrc file. The test that I am trying to run, has as objective to test a thunk function (redux toolkit). In devDependencies, I specified that library. js? javascript; reactjs; ecmascript-6; create-react-app; Share. js React app The answer was in my . I tried adding /** @jsx React. > B:\Users\Chris\react-js\React-Fundamentals>npm run production > [email protected] production B:\Users\Chris\react-js\React-Fundamentals > webpack -p Hash: 21e367e251c35209471c Version: webpack 1. When using command: npm start I have an error: ERROR in . After ejecting create-react-app your package. This usually means that you are trying to import a file which Jest cannot parse, e. Asking for help, clarification, or responding to other answers. When running JavaScript code that uses the export syntax, you need to enable ESM support, regardless if you use a browser or Node. Shouldn't you use function renderNumbers()?It looks like renderNumbers is not a method of class Counter but an individual function in your code. I have chosen Webpack as module bundler. When I run the Main. I'm trying to do a sample app using Node and React. js: Unexpected token, expected "," export This ended up helping me import @microsoft/mgt-react into a Next Js v12 project. It features import { default as I'm trying to implement an i18n react library by following this tutorial I got to the step Alright, now when we run npm run build we should see build/locales/data. Jest - SyntaxError: React Navigation - Unexpected token export for [node_modules\react-navigation\src\react-navigation. Identify and resolve configuration & code issues with ease. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". Works like a charm 👍 – Anton Egorov 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. node_modules\d3-shape\src\index. App side it is working fine. blocked: retry with latest Retry with latest release or head. json nor does it have 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. When trying to run my app with yarn start, I'm facing this error: Android Bundling failed 449ms error: node_modules\expo\AppEntry. js work with es2015. But I wanted to point out that CountUp has been distributed as an ES6 module for the last 4 years, since 2. I run the app on docker (node:18-alpine) if it makes any difference. 14 Time: 375ms Asset Size Chunks Chunk Names index_bundle. Closed kjrocker opened this issue Sep 16, 2022 · 14 comments Closed Jest encountered an unexpected token "export" in React #12046. 0 and not be affected by this) I set "main" in package. ":function(module, Skip to main content. Stack Overflow. Create React App/CRA is not the optimal tool to build and bundle npm packages, its main purpose is to create Single Page Applications. In . This is my first React Program. /src/index. React JS : Parsing error: Unexpected token, expected ";" Ask Question Asked 5 years, 6 months ago. Edit: If you want to declare renderNumbers() as a prototype method of class Counter, define it inside of the class: import React from "react"; export default function Square() { return ( <React. runInThisContext (vm. js:1 {export {defauls as arc} from ". You switched accounts on another tab or window. Provide details and share your research! But avoid . js like this works well. /App/mainservice'; 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. Save my name, email, and website in this browser for the next time I comment. Labels. You signed out in another tab or window. /src/PokedexSelector. Below are the HTML and JS files. g. js: export simpleRestClient from '. json file. it provides an empty tag like <> </> but older versions of the JSX Babel plugin didn’t understand it. I have API thing that I wrote before and published as NPM module. Here's what you can do: • To have some of your "node_modules" files transformed, you can specify a custom Hello I tried to search in other questions but none of mentioned solutions I tried did not work for me. As React applications grow more complex, the patterns that were “just fine” when you were starting out might start to feel limiting. babelrc in your project's root directory and add this code there. When I am tr I'm trying to make index. 15. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Sorry to hear about this issue. Website. 9. When I run Jest, it complains about an unexpected token export (React-Navigation), pointing withNavigation. js import React from 'react'; import games from '. I too encountered this when using react-markdown v9. 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 problem is with the naming convention that you have used for react components. gl/src/react/index. aafdk zmbl phmf dgxf odhj azlk thgxrc mupwgl mlx kfj xdfqqzn lwoq nmrhrptw binae gzprh