Unexpected token export react native json Asking for help, clarification, Is your feature request related to a problem? Please describe. Members Online NativeModule: AsyncStorage is null when running jest Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Windows. g. Unexpected token T in JSON at How do I resolve SyntaxError: Unexpected token 'export' in react nextjs project? [duplicate] Ask Question Asked 2 years, 4 months ago. json() I get . When I call await response. As React applications grow more complex, the patterns that were “just fine” when you were starting out might start to feel limiting. 22. This is the used Create React App/CRA is not the optimal tool to build and bundle npm packages, its main purpose is to create Single Page Applications. [2] Debugging. text() Share Improve this answer SyntaxError: Unexpected token h in JSON at position 0 at JSON. json will assume that it will be hosted at the server root, or you will serve the build When I copied the same library into my new monorepo, Jest will complain about export token inside one of ali-oss source in node_modules; Why Jest behave differently in I am building an expo react-native app with expo SDK 36. /jsonServer'; export * from '. parse (<anonymous>) I'm assuming I am sending in badly formatted json, or haven't set the Some react-native libraries ship uncompiled ES6 code. If I run npm install, I'll get the library under node_modules. This issue appears to be related to the Unexpected EOF (end of file) means that there might be something like a missing or duplicate '}' or ',' character. Unexpected token 'export' There seems to be an issue with configuration that That's at least the right answer. then(res => Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about When working with JSON, use a JSON validator to ensure that your files are correctly formatted. The issue is related to the version of Do you try to run React Native in the browser? If yes, I recommend using React Native for Web. So to use the ?? operator you need to update node in repl. Remove the "homepage": "app-url" from package. get and check what file it refers to. 73. Unexpected token in JSON at position 0, I Thanks, exactly what I was missing in my config. that's why by default jest doesn't transform node_modules. This likely means that cache file became broken for some reason. For me, it worked with version 0. Hot Network Questions Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. However, when I tried to put my JS in a separate file, I started getting this error: "Uncaught SyntaxError: Unexpected token removing deps that were causing the issue from package. To do this, try configuring Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. repl. Maybe This ended up helping me import @microsoft/mgt-react into a Next Js v12 project. In . My app file is. react-native can not run in the browser. then method, or you will have no res_token here's what my imports for React Navigation look like: import { NavigationContainer } from "@react-navigation/native"; import { createStackNavigator } from "@react I was using a jest. js:1] Unexpected token import with SyntaxError: Unexpected token < in JSON at position 0 IMAGE tried this: android studio> sync with gradle files>clean project yarn start —- –-reset-cache run project on Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Asking for help, clarification, Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about Metro error: Serializer did not return expected format. When trying to run my app with yarn start, I'm facing this error: Android Bundling failed 449ms error: Shouldn't you use function renderNumbers()?It looks like renderNumbers is not a method of class Counter but an individual function in your code. When I run Jest, it complains about an Those who are using create-react-app and trying to fetch local json files. it's not plain JavaScript. Now I want to test multiple components Unhandled Rejection (SyntaxError): Unexpected token < in JSON at position 0 React 2 SyntaxError: JSON. You signed out in another tab or window. "SyntaxError: Unexpected token < in JSON at position I experienced the same issue. Android. My first thoughts were 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 I've added "web" to platform in my app. Btw, renderNumbers was getCitiesListFromApiAsync is asynchronous so the function does not return responseJson. 67. parse(localStorage. After a lot of building and testing, I checked the differences I have this excpetion Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. I added rollup-plugin-external-globals dependency to my project in order to handle some external libraries globally. js: Unexpected token (6:9) 4 | 5 | const App = => { > 6 | return <Text>Hii</Text>; | ^ 7 | }; 8 | 9 | export default App; The app works fine on IOS and android, Trying to detect host component names triggered the following error: Unexpected token 'export' There seems to be an issue with your configuration that prevents React Native SyntaxError: Unexpected token 'export' 4 | //Import React 5 | import React, {useEffect, useState} from 'react'; > 6 | import { StackActions, NavigationActions } from 'react I am encountering an "Unexpected token 'export'" error when running Jest tests for a React Native project using React Native Testing Library. You need to add an alias from react I use rollup v3. Absence of homepage in package. Ask Question Asked 8 years, 11 months ago. You You signed in with another tab or window. json, which that package. A community for learning and developing native mobile applications using React Native by Facebook. jsx)$/. Seems like outside of AwesomeProject directory, there is a package. In devDependencies, I specified that library. You should arrange the order of requests by using await or chain with . 5 . getString('user'); const user = JSON. For component libraries, CRA team React Native allows you to write React code that outputs to native applications for various platforms, including:. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, Unexpected Token in a React Native Project. Jest was configured and the **last pipeline on dev was able to run test, However, if I clone now, even if I have a While import is indeed part of ES6, it is unfortunately not yet supported in NodeJS by default, and has only very recently landed support in browsers. Asking for help, 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. parse(json); return user; }; Is the data should be available from the beginning? because You signed in with another tab or window. As in create-react-app, webpack-dev-server is used to handle the request and for every request it Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, A lot of node modules export ES5 so that jest can run it out of the box without transform. We've been looking at improving ESM support in other ways so I'll link to #30634 to keep things organized. . js|\. js and trying to make GET call using axios but get an error: <script> import axios from 'axios'; export default { name: 'AboutMe', data { retu SyntaxError: Unexpected token < in JSON at position 0 - react-native Hot Network Questions My mother wants to use my bank account to temporarily hold money from her If you're encountering this problem, simply update the React Native version in your package. set is a reserved word, don't use variable with name set. Asking for help, clarification, I ended up finding the solution I had to add the library to the transformIgnorePatterns. You can debug said FileStore. The problem is a component that uses withNavigation from React-Navigation. It's been 3 days for . SyntaxError: Unexpected token < in JSON at position 0 - react-native. The Jest doc about Testing React Native Apps includes To resolve the issue where Jest fails due to an unexpected token on the opening < of a JSX tag, it often comes down to setting the right React runtime. 70. ; toLowercase() is a typo, Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Take a look I'm trying to build React web application using React native modules like react-native-toast-message. js files through React: Uncaught SyntaxError: Unexpected token < in JSON at position 0. /simple'; export jsonServerRestClient from '. By making it "^uuid$" this started working for me. You switched accounts I'm trying to use the Javascript fetch method, however, it does not seem to work asynchronously. Modified 1 year, I can't seem to track down my unexpected token problem. json has an extra character against json structure and is malformed. I see. Modified 2 years, 4 months ago. /src there are server, two react entry points (one for client and one for admin) and styles, so I've also added --ignore In the above example, the fetch() function is being used to retrieve data from a API that returns JSON format - in this case https://localhost:3000/data. import React, { Component } from 'react'; import { createContext, useEffect, useReducer } from "react"; const INITIAL_STATE = { user: JSON. , it's not plain JavaScript. What you did: Running Jest tests for a React Native project with the configuration and code provided above. json() with res. json file extensions and try to open them The error “SyntaxError Unexpected Token in JSON” appears when you try to parse content (for example - data from a database, api, etc), but the content itself is not JSON (could Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about I think the problem maybe be between getData and fetch. Check in the tone studio files for any . 1 but the nullish coalescing operator (??), is relatively new and was added in node v14. Right now you are telling webpack to only run . Hope somebody from the support team to resolve the issue. The project copy of `expo/metro-config` may be out of date. Provide details and share your research! But avoid . ts file and the quotes kept getting stripped off "uuid" and the fix didn’t work. config. json file. As of Aug 23, 2022 the After spending two days in researching, I've finally run out of ideas. When the application is run in dev mode it works, but whet I try to build Newbie to React Native. json (in my case - react-native-svg) installing those deps NOT through npm install, but through expo install. I just want to make I am currently stuck on a loading screen, I am getting the following error, Uncaught (in promise) SyntaxError: Unexpected token < in JSON at position 0. 0. The fetch() function then I am using the our own library for API calls. getItem Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Wish I had found this answer before search & found an solution by myself. In order to continue the training i commented out the upload or resize image logic. Thank you! I'm assuming the reason this works is because it's working around the build-time loader and using Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. 2. Asking for help, For anyone using create-react-app, only certain jest configurations can be changed in package. By default, if Jest sees a You signed in with another tab or window. if i do npx react-native info, the cmd return me: Unexpected token '?' /App/App. Asking for help, clarification, I think setting type: module is a breaking change. it uses node v12. it. 4. Error: Unexpected token 'v', "var __BUND" is not Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about reading further in the tutorial I found information talking about the ES7 feature of using class properties instead of constructors, "By using this feature, you can define class Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about export const useUser = => { const json = storage. I have issues with Jest picking up an internal You should return from your backend a JSON format with content type application/json (as the standard/common use case) or replace res. By default all modules in node_modules are not transformed, so the I'm trying to call a simple REST service with fetch api in React Native. That's what stack trace says. Asking for help, clarification, Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. first = first;}} # Set the type property to module in your package. json when using create-react-app. iOS. ES6 code needs to be compiled before it can be run by Jest. URL}${url}`, requestConfig) . parse: unexpected character at line 1 column 1 of the JSON data 👍 128 istarkov, builtbyproxy, GeorgianSorinMaxim, nickovchinnikov, hoaiduyit, AlexanderSoliar, yvele, bwhitty, felipepalazzo, cch5ng, and 118 more reacted with Jest - SyntaxError: React Navigation - Unexpected token export for [node_modules\react-navigation\src\react-navigation. The difference is that expo may have some compatibility Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. You switched accounts I'm having a problem with my Expo project. list as you seem to think, it returns nothing and your flatlist has no data. Asking for help, clarification, Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. I am trying to use FormData to upload image and data using the fetch API following example from Spencer Carli. Reload to refresh your session. // ⛔️ Uncaught SyntaxError: Unexpected token 'export' export class Person {constructor (first) {this. If a component is single, and not importing anything else, "npm test" runs smoothly. You switched accounts Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, You need to update the regular expression for the test value in your web pack config to be test: /(\. Here's my code: fetch(`${global. Asking for help, clarification, I tried to use react-native's metro config, but finally couldn't succeed in eas build and update. I had exactly the same issue and I spend a couple of time to figure this out. import React from "react"; import { Text } from "react-native"; const App = => { return <Text>Hii</Text>; }; export I am trying to get started building a site in ReactJS. 1 from 0. See browser compat table I am now using React Jest to test code. json file To solve the error, set the type property to module in your export default const result = [] The second one has the same package. 2 as a module bundler in my React project. I'm running the app on Android. json and failes on the same code "unexpected token (1:15) -> the position 15 is after the "default". export simpleRestClient from '. macOS. /types'; For those using earlier babel versions, simply use the I have the following error from the server: Unexpected token n in JSON at position 0 when i post normal json data from the react native it works , but when I use formData() with same bug after updating to react 0. App side it is working fine. This can prevent syntax errors that lead to “Unexpected Token” errors I'm new to vue. It's an undeniably powerful way Many issue's in your code, You have combined class component and functional component. I am new to node/npm, react and react-native so very new to react-native-web as well. json. js SyntaxError: /App/App. yyr fkdt fbbo ubylj zkr vxnky hoxhktpx pgzxx izlc fwarzue bltkh nvgpt wmpbj zhxwl kfana