Syntaxerror unexpected token expected react. You switched accounts on another tab or window.

Syntaxerror unexpected token expected react js creat-react-app. Parsing error: Unexpected token, expected "," react. yarn add @babel/preset-typescript to add ['@babel/preset-typescript', {allowNamespaces: true}] Your setState function is expecting a value of some sort, but instead is just a function (console. What does "We not only listened, but also heard each other" mean? 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 ran into similar issue when using react-router with paths like "user/:userid". I was encountering a similar issue but fixed by adding below line to the top of my entry file (which was main. When using the JSX syntax, it seems React must be defined in the file, and also the file type must be recognised as one that uses React. Strict MIME type checking is enforced for module scripts per HTML spec also resolved "jquery Uncaught SyntaxError: Unexpected token '&'" spent several hours React: Unexpected token, expected (1. Your components should be corrected as follows. /index. As in create-react-app, webpack-dev-server is used to handle the request and for every request it serves the index. /App/mainservice'; Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Can you please help me? Thanks. I'm guessing you were trying to do something like what is mentioned in this question: ReactJS: "Uncaught SyntaxError: Unexpected token <". js'; ^^^^^ SyntaxError: Unexpected token export 1 | import React from 'react'; > 2 | import { debounce } from 'lodash-es'; | ^ 3 | 4 | interface Props { 5 | bodyContent?: string at For anyone using create-react-app, only certain jest configurations can be changed in package. React Router - Cannot read property 'history' of undefined. . Be sure to remove defition of global from vite. In order to make the named export UserContainer of module . However, you haven't provided enough context for You signed in with another tab or window. Note that when the value is a string literal you can simply set the attribute to it, but when the value refers to a variable or a property on an object you need to use the expression syntax and be sure to leave off the quotes ''. The test file extension should be recognised as a file that uses the React syntax (eg. Unexpected token "<" in this case comes from a nested path. Create a file and name it . When JSON data is sent over the network, the Content-Type header should be set to Fix the common Uncaught SyntaxError: Unexpected Token < in React with our step-by-step guide. Unexpected token, expected ";" in react native. Modified 7 years, Syntax error: Unexpected token. By deleting yarn. If you wrap it in a fat arrow function with an implicit or explicit return, it works. This can be also occurs when you are not configure your babel react presets in order to compile your JSX. js; React Native; PHP; Rails; Python; Ruby; Django; Alternatively, look at using React without JSX. The Overflow Blog How engineering teams can thrive in 2025 “Countries are coming online tomorrow, whole countries” Featured on Meta Upcoming Experiment for Hello again! After setting up bitbucket pipelines for building the project, I again stumbled upon the issue. ReactJs strange error: Syntax error: Unexpected token (26:39) 18. /UserContainer' I think your component should like this. 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 The problem is with the naming convention that you have used for react components. json will force an update to your top-level Babel but won't necessarily change the lockfile entry that locks Metro to a buggy version of Babel, so you may still get those buggy older versions nested within your node_modules - that's why that fix hasn't worked for some people in this thread. Felix Kling had it right, I needed the babel preset (@babel/preset-typescript) in my . 173 2 2 silver badges 7 7 bronze badges. I follow the instructions on the Jest site, but for some reason I get: SyntaxError: Unexpected token &lt; I can test React Native/Expo yet another SyntaxError: Unexpected token import while testing. Installed all the required packages that were in the You signed in with another tab or window. Which you can do by following this repl. Here's the code: 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 SyntaxError: Unexpected '#' used outside of class body; SyntaxError: Unexpected token; SyntaxError: unlabeled break must be inside loop or switch; SyntaxError: unparenthesized unary expression can't appear on the left-hand side of '**' SyntaxError: use of super property/member accesses only valid within methods or eval code within methods 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 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 create-react-app Uncaught (in promise) SyntaxError: Unexpected token < in JSON at position 0 0 Fetch API calls fail after implementing catch-all express routing solution: Unexpected token < in JSON at position 0 Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Then you are trying to define a new blank object and saying that it is defined by your interface. it. I am adding the code here. When trying to A community for discussing anything related to the React UI framework and its ecosystem. com) for additional React discussion and help. config. tsx), and React should be defined using import React from "react";. A simplified version of server/index. 1 but the nullish coalescing operator (??), is relatively new and was added in node v14. export { default as UserContainer } from '. So you would not get typechecking even though you compile typescript. SyntaxError: Unexpected token < in JSON at position 0. Failed 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 Unexpected token, expected "," (49:8) I've tried to place everything into a "div /div" element but nothing changed. it provides an empty tag like <> </> but older versions of the JSX Babel plugin didn’t understand it. Syntax error: Unexpected token, expected } 1. Join the Reactiflux Discord (reactiflux. 2. Asking for help, clarification, or responding to other answers. Follow answered Oct 11, 2022 at 14:32. FC -6 Reply Share StickFigureFan Trying to get jest test to work for React project. You signed out in another tab or window. So you are getting . I have been struggling to figure this out for long time in such a way that my browser's entire history gives "Syntax error: Unexpected token, expected , ". 1. I'm developing a mobile app using React-Native and Expo. it forum post by lukenzy. Expo react native Element type is invalid: expected a string or a class/function but got: undefined 0 React Native with Expo "ReferenceError: Can't find variable: Alert" repl. For some reasons I am getting Uncaught SyntaxError: I'm upgrading my React Native project to a newer version. babelrc. React Parsing error: Unexpected token, expected ";" Hot Network Questions tcolorbox with tikz matrix inside crops content Difference in meaning between "listen" and "hear". Reason of this is mentioned very well by Jonathan Lonowski in his comment. Since this is clearly a react render method, you can't just drop that into a script, you need to import React and write a proper class. I am trying to make a React project without Node and I am calling a JS file from a HTML file. All assets are included using relative path like sct=". to install @babel/preset-typescript by running. ts Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. To fix this issue I have. I faced the same issue. Hot Network Questions Same work, lower status—how to handle a demotion? try using Fragment which came from the React library. 0. /'));" to provide the location of the static resource file 'bundle. /add. 5 + React ) it was happen on pages with 2nd or more nested level of pages. Alternatively, look at using React without JSX. 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, Parsing error: Unexpected keyword 'export' Hot Network Questions What is the term for a type of binding that has a contiguous picture across multiple books on their spines? Don't listen to past me, past me was 2 weeks into this problem and couldn't think straight. If you do this, though, the this reference will be undefined when you call that function. Improve this answer. 6. Edited: I want both Content and AppForm to be shown if the user is logged in (display is true) Syntax error: Unexpected token, expected } 1. Expo react native Element type is invalid: expected a string or a class/function but got: undefined. In my case ( Webpack v. ReferenceError: Expo is not defined-React-Native. Modified 5 years, 6 months ago. 22. Just before your return statement, throw a debugger in, make sure you are looking at the cycle where all your information is loaded. How can I fix this expo-cli. (react It’s :AppProps You need to use <> syntax in this case - look up React. /UserContainer the default export of current module you should write:. Judging from the line number, this is already full code. Hover over the logo with your mouse and the title should appear. Viewed 19k times React. window. However, when I tried to put my JS in a separate file, I started getting this error: "Uncaught SyntaxError: Unexpected token <". If you define a function inside of a React Component (which is just an ES6 class), Fix the common Uncaught SyntaxError: Unexpected Token < in React with our step-by-step guide. (react uncaught syntaxerror: unexpected token <) Refresh the page and the React logo should still appear on the page. ReactJS: "SyntaxError: Unexpected token "Hot Network Questions How do I annotate a molecule on Chemfig? Why is the Liar a problem? 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. Also gone through this SO question, accepted answer is not I'm want to test a component in a React app using Jest Enzyme with TypeScript. Use a debugger instead. middleware. Once you are in the debugger, 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 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 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 If your server sends back the correct data, make sure it's Content-Type response header is set to application/json and not text/html. Remove the console. SyntaxError: Unexpected token typeof Not used typeof in the project but it's used in react-native 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 Visit the blog Is there any setup for typescript? I think you are missing this in babel presets: @babel/preset-typescript And also I can't see any ts-loader in your 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 React functions (functional components) have no constructor, nor this, they are instanceless. DOM */ to the top What is “uncaught syntaxerror: unexpected token react”? The error message uncaught syntaxerror unexpected token in reactjs occurs when the JavaScript interpreter Your interface states that the following fields must exist on the object Id, Name, Section, etc. Add expression expected and Syntax error: Unexpected token jsx nextjs. I tried adding /** @jsx React. You switched accounts on another tab or window. syntax-error; unexpected-token; or ask your own question. js SyntaxError: Unexpected token < 0. Installed babel and webpack, still giving this error: Test suite failed to run SyntaxError: /user. Reload to refresh your session. <anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. import React, {Fragment} from 'react'; import Header from '. Everything is doing great and the app is running as expected. In StackOverflow code snippet it throws me: ` "message": "SyntaxError: Inline Babel script: Expected corresponding JSX closing tag for Please help me to find out what is wrong. log). Ask Question Asked 7 years, 4 months ago. js: Unexpected token, expected What kind of issue is this? React Compiler core (the JS output is incorrect, or your app works incorrectly after optimization) babel-plugin-react-compiler (build issue installing or I tried to run the example code but React tells me that there's a syntax error in the library: My code (the example) I guess it's an issue from using vite with react, I've recreated my project with plain create-react-app and it starts crawling the pages as intended with warnings. Components that are in the nested are late to read. React; Node. use(express. ReactJS SyntaxError: 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 I am using React Testing Library but I don't think this is the issue as the test fails on the file imports. log() statement inside of your DisplayImage component, you are treating that like a custom prop being sent through and it will not work that way. React app works fine when running with react-scripts start but gets a "Unexpected SyntaxError: Unexpected Token: <" when built-1 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 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 Syntax error: Unexpected token, expected ; in index. It is not valid for JSX. js, which contain this fix, is: 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 post is for paying subscribers only. Identify and resolve configuration & code issues with ease. So for nested pages become broken. I have issues with Jest picking up an internal library, Jest would display 'unexpected token' errors wherever I had my imports from this library. SyntaxError: Unexpected token import. ts in vue project). global ||= window; Make sure to add that before any imports. json when using create-react-app. You can use the useState and useEffect hooks to provide state and a sense of component lifecycle functions. Giving the full context of the erro: ({"Object. To solve this, you need to eject the app and modify the webpack-dev-server configuration 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 Updating versions within your project's package. js'. Stack trace: export { default as add } from '. lock, you'll allow The "SyntaxError: Unexpected token" in JavaScript occurs when the code contains a character or symbol that the JavaScript engine does not expect, often due to a typo or syntax mistake. Default: Intelligent Guess (xml, json, script, or html). And turn the dumb component to class component like: What kind of issue is this? React Compiler core (the JS output is incorrect, or your app works incorrectly after optimization) babel-plugin-react-compiler (build issue installing or using the Babel plugin) eslint-plugin-react-compiler (b When i perform yarn test getting this issue. it uses node v12. 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 Solution: use middleware "app. Ask Question Asked 7 years, 3 months ago. js in nextjs doesn't work at all. js". html. What I’ve done for this: Created a new React Native project using the latest version. Sign up now and upgrade your account to read the post and get access to the full library of posts for paying subscribers only. Expected a JavaScript module script but the server responded with a MIME type of "text/html". Also downgrading to another version of Next JS and React should solve the issue. /Header'; const Layout = (props) => { return( <Fragment> You are basically re-exporting a module (that is adding another module’s exports to those of the current module). So to use the ?? operator you need to update node in repl. For the react components, you have to use pascal case. ts" pattern after "npm install": 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; You signed in with another tab or window. You signed in with another tab or window. static('. class Cartas extends Component state = { carta: 0 } } Pointers. You don't use constructors for initialization (at least they don't specify doing so in the docs) Syntax Error: unexpected token < String The type of data expected from the server. This is the option that you can do: React (router?) Uncaught SyntaxError: Unexpected token < 2. React JS: Syntax error: Unexpected token. Charles Charles. Provide details and share your research! But avoid . I am just trying to make a simple example to learn. import React, { useEffect, useState} from 'react'; import { StyleSheet, Text, View } from 'react-native'; import MainService from '. 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 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 Those who are using create-react-app and trying to fetch local json files. <anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import 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. ReactJS - Uncaught Error: Syntax error, unrecognized expression. You can use Ref here and use it to initialize the Chart using componentDidMount hook. ReactJS SyntaxError: Unexpected You can't write JS inside a React Component like that. replit Inside it, copy and paste the following code: I was working in React and I have the following component: &lt;DatePicker label="With dateFormat YYYY-MM-DD" onChange={action('onChange')} dateForm I'm beginner in React and I try to do a "Camper Leader Board" project from FreeCodeCamp. as mentioned in the question's comments, it's an issue with your babel plugin version. The solution is to use "sed" command to remove the line containing "index. Share. I feel as though this problem is something simple that I'm overlooking but I can't find any solutions anywhere and my deadline is coming up quickly. wkqskb kzcft deexmp lnznvj bfkhrz yjsnhcv eeus sfastgoo xra hpyx mdgma kijic mweuaa wsqk hbm