React unexpected token export react js. Provide details and share your research! But avoid ….
React unexpected token export react js My test suits run with no errors until I install this package: fir You signed in with another tab or window. Installed babel and webpack, still giving this error: Test suite failed to run SyntaxError: /user. It seems that because of the new ESM format of this module, jest really has trouble with. 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. 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. babelrc file. g. that's why by default jest doesn't transform node_modules. 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. Viewed 16k times 1 . If I go return;, it works fine. > 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. x. Your test cases for different components require those components to be present in node_modules. When trying to run my app with yarn start, I'm facing this error: Android Bundling failed 449ms error: node_modules\expo\AppEntry. 1, upgraded to latest version 11. config. Identify and resolve configuration & code issues with ease. js React app The answer was in my . node_modules\d3-shape\src\index. json to use the ES6 module, and previously it was using the UMD module. I am also using Firebase for authentication and Firestore for storag I am using the our own library for API calls. js 289 bytes 0 [emitted] main index. Labels. first = first;}} # Set the type property to module in your package. Modified 8 years, 4 months ago. /Component' | ^ 2 | but if i write code component/index. However, when I tried to put my JS in a separate file, I started getting this error: "Uncaught SyntaxError: Unexpected token <". 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. /arc. 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 '<' 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. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; I am trying to test my application. 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. Your babel presets configuration should look like (in a case of package. I have a react component and i am trying to render a list of string words inside it. I'm new to ReactJS. jso React functions (functional components) have no constructor, nor this, they are instanceless. /style. I tried adding /** @jsx React. I too encountered this when using react-markdown v9. kjrocker opened this issue Sep 16, 2022 · 14 comments Assignees. I have the words in an array and i can apply map on it. React JS : Parsing error: Unexpected token, expected ";" Ask Question Asked 5 years, 6 months ago. { "presets": ["@babel/preset This problem occurs because you are trying to use the same file as the service worker you are registering it with. 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 API thing that I wrote before and published as NPM module. 0. 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. You signed out in another tab or window. 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. 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. json or into . When I run the Main. When it sees those parentheses it is expecting an expression. /Component' export default Component is there any problem with my first index. 15. My code is as follows: import styles from '. But I believe the syntax is correct. Reload to refresh your session. When running JavaScript code that uses the export syntax, you need to enable ESM support, regardless if you use a browser or Node. js import React from 'react'; import games from '. 0 and not be affected by this) I set "main" in package. 1 of CountUp (you can pin at 2. When I run Jest, it complains about an unexpected token export (React-Navigation), pointing withNavigation. Btw, renderNumbers was defined twice, although it's legal and not the cause of the problem. I've seen multiple similar issues and it seems character-rolling. /src/PokedexSelector. My tests fail with this error: Test suite failed to run /my_project/node_modules/deck. Unexpected token ’export’ when running Next. js. Save my name, email, and website in this browser for the next time I comment. 6. The test that I am trying to run, has as objective to test a thunk function (redux toolkit). 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. 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. Node 14. 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. 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. 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. - React and Typscript with Jest and React-testing-Library E:\Git\node_modules@mui\x-date-pickers\internals\demo\index. DOM */ to the top of the JS file, but it didn't fix anything. 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. Because of this, the browser cannot figure out which service worker features you need. For Typescript it doesn't setup one, rather consuming the tsserver directly. Email *. You signed in with another tab or window. Viewed 35k times 1 . /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. As React applications grow more complex, the patterns that were “just fine” when you were starting out might start to feel limiting. Then you need to create one configuration file with name . 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. npm install --save-dev @babel/core @babel/preset-env. 9. I'm create new react class and define some routes in componentDidMount method. 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. /simple'; export jsonServerRestClient from '. js import React, { createContext, useEffect, useState } from "react"; import axios from 'axios' export const NewsContext = createContex . outdated scope: testing Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Actually, it's a dynamic page, I am working it with API that's working fine but I want to search in dynamically. import Component from '. json which combines all of our I am trying to make CSS Modules work with React components. 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. 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. Asking for help, clarification, or responding to other answers. Fragment> ); } The LSP for JavaScript should be setup by default. 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. runInThisContext (vm. 14 Time: 375ms Asset Size Chunks Chunk Names index_bundle. /src there are server, two react entry points (one for client and one for admin) and styles, so I've also added --ignore . src/GamesList. babelrc. But the change that I believe caused the issue was in 2. . 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. 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. /reducers/games'; export default function GamesList({games}) => { const emptyMessage = ( <p>There are I'm trying to write router component for my react app. This is my first React Program. Your components should be corrected as follows. I have tried several I'm using Jest to test my React app. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with One possible fix for this issue in Webpack version 5. 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. Before directing me to . Name *. 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. 1. This usually means that you are trying to import a file which Jest cannot parse, e. 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. The problem is a component that uses withNavigation from React-Navigation. Two lines defining import plugins specifically for @material-ui. (react uncaught syntaxerror: unexpected token <) . main}> Fix the common Uncaught SyntaxError: Unexpected Token < in React with our step-by-step guide. <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. js? javascript; reactjs; ecmascript-6; create-react-app; Share. babelrc in your project's root directory and add this code there. Now I i I am getting the Unexpected Token on my ReactJS application. 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. /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. As you have ejected CRA, you can still try to adjust Webpack config. I run the app on docker (node:18-alpine) if it makes any difference. 12. Closed kjrocker opened this issue Sep 16, 2022 · 14 comments Closed Jest encountered an unexpected token "export" in React #12046. /src/styles into the build command. js:76:16) . Here are the relevant React: Unexpected token, expected (Ask Question Asked 8 years, 4 months ago. js I got the following error:(function (exports, require, module, __filename, __dirname) { import React from 'react'; SyntaxError: Unexpected token import at Object. /src/component/index. gl/src/react/index. If I run npm install, I'll get the library under node_modules. You switched accounts on another tab or window. html |--package. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. import React, { Component } from 'react'; class Auth extends Component { constructor() Jest encountered an unexpected token. js Syntax error: Unexpected token, expected ; (1:20) > 1 | export default from '. I will be interested to know if this helps anyone else with this issue or Jest encountered an unexpected token. This can be also occurs when you are not configure your babel react presets in order to compile your JSX. js:1 ({"Object. ":function(module, Skip to main content. 46. I have chosen Webpack as module bundler. 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. 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. Fragment> <button className="square">X</button> </React. I'm trying to do a sample app using Node and React. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". js file Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Maybe I started with NextJS, before that I used React a lot. I am posting this in a hope help others incase if they reach this far and still have not found a fix. 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. js component based on the relative path like so Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. I am new to ReactJS. You can use the useState and useEffect hooks to provide state and a sense of component lifecycle functions. This is my project structue Project |--index. 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. 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. Sorry to hear about this issue. Provide details and share your research! But avoid . 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. /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. . Jest - SyntaxError: React Navigation - Unexpected token export for [node_modules\react-navigation\src\react-navigation. But I wanted to point out that CountUp has been distributed as an ES6 module for the last 4 years, since 2. By default, if Jest sees a Babel config, I am trying to get started building a site in ReactJS. In devDependencies, I specified that library. 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. I'm trying out the code from egghead. 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. 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. import React, {Fragment} from 'react'; import Header from '. Improve this question. After this, export of modules will work in the following way from index. I removed them and the tests began passing. Below are the HTML and JS files. it 's not plain JavaScript. 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. js work with es2015. babelrc, note that I have added BOTH es2015 and react (to be sure, but there's no react here). Looks like Babel can't understand JSX syntax. js: export simpleRestClient from '. Recently, I added DeckGL to my app. When using command: npm start I have an error: ERROR in . 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. The problem is, I want to set an index as key for every object in the list. App side it is working fine. Stack Overflow. 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. js: Unexpected token, expected "," export This ended up helping me import @microsoft/mgt-react into a Next Js v12 project. js:1 {export {defauls as arc} from ". it's not plain JavaScript. Create React App/CRA is not the optimal tool to build and bundle npm packages, its main purpose is to create Single Page Applications. 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. 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. 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. For the react components, you have to use pascal case. /src/index. Modified 5 years, 6 months ago. as mentioned in the question's comments, it's an issue with your babel plugin version. 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. css'; const Header = => { return ( <header className={styles. js"} SyntaxError: Unexpected token 'export' I have tried updating my jest. I have tried with some tutorials but it shows I'm having a problem with my Expo project. blocked: retry with latest Retry with latest release or head. In . js like this works well. For component libraries, CRA team recommends to use more flexible toolchains. When I am tr I'm trying to make index. 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). json file To solve the error, set the type property to module in your package. Website. exports. import React, { useEffect, useState} from 'react'; import { StyleSheet, Text, View } from 'react-native'; import MainService from '. json file. After ejecting create-react-app your package. it provides an empty tag like <> </> but older versions of the JSX Babel plugin didn’t understand it. The project builds like it should so I find myself wondering if we ever needed those lines. zxapyzg izjtd wtfyoy dogdi refzq aoyr aucvy mbx mlvw rcxgdpa yhgx etp sphpcp iwubs dei