Syntaxerror unexpected token expected react Identify and resolve configuration & code issues with ease. Hot Network Questions How to add parallel lines in tikz Why did Paul need a supernatural vision in order to believe in Christianity? Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Just before your return statement, throw a debugger in, make sure you are looking at the cycle where all your information is loaded. 6. Edit package. Uncaught SyntaxError: Unexpected token < reactjs react-pdf. In order to make the named export UserContainer of module . This has happened to me before and including babel-register for the syntax never felt clean to me anyway. js Module build failed: SyntaxError: Unexpected token (10:18) 0. js: Unexpected token, expected "," 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 try using Fragment which came from the React library. js and component. it. 22. For some reasons I am getting Uncaught SyntaxError: Unexpected token React app works fine when running with react-scripts start but gets a "Unexpected SyntaxError: Unexpected Token: <" when built -1 'npm run build' gives me uncaught syntax error: Unexpected token '<' when I try to render the html file for my single page react app Here's a slight syntactic variation to anuragasaurus answer. Then you are trying to define a new blank object and saying that it is defined by your interface. Hot Network Questions Repetition-restricted strings Are file names starting with whitespace illegal in Windows 11? Jest doesn't use Webpack so it doesn't know how to load other file extensions than js/jsx. Improve this answer. We don't have access to this in functional component. { default as add } from '. You can use Ref here and use it to initialize the Chart using componentDidMount hook. js ├── component │ ├── index. You can use the useState and useEffect hooks to provide state and a sense of component lifecycle functions. What's wrong? The React “Uncaught SyntaxError: Unexpected Token” error typically occurs when there is an unexpected character or token in your ReactJS code. The body of your callback is a JavaScript block, but you are wrapping it in ( /) and aren't returning anything. set is a reserved word, don't use variable with name set. So the JSX syntax of <RouterContext will not be picked up by the renderToString method. Unexpected token, expected } 1. You can instead use a Short-circuit evaluation:. html entry point. I'm beginner in React and I try to do a "Camper Leader Board" project from FreeCodeCamp. parse error: SyntaxError: Unexpected token ' in JSON at position 1. I am just trying to make a simple example to learn. This is where using proper indentations and any decent IDE would help catch/identify these for you. 9. 0 $ / Trying to get jest test to work for React project. 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. Modified 6 years, 2 months ago. use(express. So to use the ?? operator you need to update node in repl. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. ERROR in . Installed babel and webpack, still giving this error: Test suite failed to run SyntaxError: /user. Create a file and name it . 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 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 Many issue's in your code, You have combined class component and functional component. Uncaught SyntaxError: Unexpected token in import React 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 Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Reload to refresh your session. This error typically occurs when there The uncaught syntaxerror: unexpected token react error typically occurs when there is an issue with the syntax or structure of your React code. React SyntaxError: Unexpected token '<' 0. Uncaught SyntaxError: Unexpected token < with React. Expo react native Element type is invalid: expected a string or a class/function but got: undefined. Provide details and share your research! But avoid . undefined is not an object ( evaluating '_expo. Ask Question Asked 6 years, 11 months ago. 1a4953075f808eb6a767. You switched accounts on another tab or window. So you would not get typechecking even though you compile typescript. Unexpected token React. Reason of this is mentioned very well by Jonathan Lonowski in his comment. Webpack - You may need an appropriate loader. it provides an empty tag like <> </> but older versions of the JSX Babel plugin didn’t understand it. The solution is to use "sed" command to remove the line containing "index. Identify and resolve Trying to get jest test to work for React project. static('. jsx for example ├── App. js │ └── Component. Unexpected token '<'" 1. js'. By deleting yarn. js, which contain this fix, is: React Jest tests fails with react-dnd: SyntaxError: Unexpected token 'export' Ask Question Asked 2 years, 8 months ago. it uses node v12. Felix Kling had it right, I needed the babel preset (@babel/preset-typescript) in my . You don't use constructors for initialization (at least they don't specify doing so in the docs) Use a debugger instead. For IE-11: SCRIPT1028: SCRIPT1028: Expected identifier, string or number. It may be due to incorrect import statements, missing dependencies, syntax The JavaScript exceptions "unexpected token" occur when the parser does not see a token it recognizes at the given position, so it cannot make sense of the structure of the You are using a map, but your callback isn't valid JavaScript. Uncaught SyntaxError: expected expression, got '< with react. What's wrong with my syntax? I'm a bit confused In this article, we’ll explore the various causes of the “Unexpected Token” error in React, understand why it occurs, and discuss practical solutions to fix it. babelrc. export { default as UserContainer } from '. js: Unexpected token, expected For some reason that I can't figure it out I am getting a syntax error in the following React component. interface Props { someProp: string; someOtherProp: number; // etc } 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. The following is my first script. log). Components that are in the nested are late to read. js 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 You've incorrectly closed Header, i. ReferenceError: Expo is not defined 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 You can't write JS inside a React Component like that. Here's the code: React Native/Expo yet another SyntaxError: Unexpected token import while testing. as mentioned in the question's comments, it's an issue with your babel plugin version. jsx index compo 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 Your interface states that the following fields must exist on the object Id, Name, Section, etc. 67. js SyntaxError: Unexpected token < 1. SyntaxError: /user. Viewed 4k times ^^^^^ SyntaxError: Unexpected token 'export' I Googled. I follow the instructions on the Jest site, but for some reason I get: SyntaxError: Unexpected token &lt; I can test You signed in with another tab or window. Webpack Build SyntaxError: Unexpected token ) Hot Network Questions Detecting being inside a subscript or superscript in LaTeX3 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 . <anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import repl. 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. Script tag in React throwing Uncaught SyntaxError: Unexpected token '<' Hot Network Questions Using both -er and -erin for people from a certain country or region I'm want to test a component in a React app using Jest Enzyme with TypeScript. /UserContainer the default export of current module you should write:. it forum post by lukenzy. 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. When I compile it there is no problem but if I include it on my symfony project I have this error: ⇒ yarn encore dev --watch yarn run v1. ReactJS SyntaxError: Unexpected token. And turn the dumb component to class component like: every time I compose react component I make folder for it. <Header/> versus </Header>, and you dropped two closing div tags outside the header instead of in it, and the first div is missing its closing tag. I assume you don't want your view in the header, so I left it below it. Asking for help, clarification, or responding to other answers. the error that is thrown out is: Unexpected token, expected; (9:16) This points to the first line of the renderNumbers() function. (react uncaught syntaxerror: unexpected token <) You are basically re-exporting a module (that is adding another module’s exports to those of the current module). /app/main. Also type Props = {} is not what you want. js'; ^^^^^ SyntaxError: Unexpected token export 1 | import React from 'react'; > 2 | import { debounce } from 'lodash-es'; | ^ 3 | 4 | interface Props { 5 | bodyContent?: string at ScriptTransformer React SyntaxError: Unexpected token '<' Hot Network Questions Same note on both staves - particular case Can my American Miele washing machine use a European part? (Same except 60Hz vs 50 Hz) Is it known if the massively increased risk of heart disease in the Apollo astronauts was due to exposure to radiation? Look at the response, it is probably HTML when js is expected. You signed out in another tab or window. 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 The issue Unexpected token '<' is because of missing the babel preset. I believe the issue stems from the fact that requiring babel-register will not work for the file you import it in, but for files that get imported afterwards. 1. lock, you'll allow 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 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. Ask Question Asked 7 years, 9 months ago. SyntaxError: Unexpected token '<' Hot Network Questions Regex a string with a Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. React Router - Cannot read property 'history' of undefined. Constants') 1. This can be caused by various factors, including incorrect syntax, If you have been working with ReactJS, you might have encountered the error message “Uncaught SyntaxError: Unexpected token <“. Solution: use middleware "app. my package. This is the option that you can do: React (router?) Uncaught SyntaxError: Unexpected token < 2. Remove the console. /App/mainservice'; Uncaught SyntaxError: Unexpected token < with React. /UserContainer' Your setState function is expecting a value of some sort, but instead is just a function (console. /add. e. You need to use an interface for your props like:. Once you are in the debugger, 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" Uncaught SyntaxError: Unexpected token < with React. Viewed 10k times 20 . SyntaxError: Unexpected token '<' Hot Network Questions What is the function of Vintage Apple Audio cable 590-0618-A I am using React Testing Library but I don't think this is the issue as the test fails on the file imports. Don't listen to past me, past me was 2 weeks into this problem and couldn't think straight. People were discussing and saying module mappers should be added, so I added this code inside jest config: Updating versions within your project's package. To add support for other extensions you need to write custom transformers. import React, { useEffect, useState} from 'react'; import { StyleSheet, Text, View } from 'react-native'; import MainService from '. If you wrap it in a fat arrow function with an implicit or explicit return, it works. If there is no "else" in your condition you don't need a ternary expression condition ? value1 : value2. Modified 6 years, 11 months ago. 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. ; Your search input should be controlled. class Cartas extends Component state = { carta: 0 } } Pointers. Hot Network Questions 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 < with React. By the end, you’ll have a clear understanding of how to troubleshoot and (react uncaught syntaxerror: unexpected token <) Fix the common Uncaught SyntaxError: Unexpected Token < in React with our step-by-step guide. I am trying to make a React project without Node and I am calling a JS file from a HTML file. It seems babel Jest encountered an unexpected token when testing react-native with jest. I am very much new to React. Ask Question Asked 6 years, 1 month ago. What I 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 building an automated chart using react-chartjs-2 in react and for a second I added the options: {legend: {display: false}} and I started having this error, I removed the code from above and the 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 For Safari(10. default. ; toLowercase() is a typo, it should be toLowerCase(). Viewed 18k times 3 . When i perform yarn test getting this issue. Modified 3 months ago. 0. Expected number of rolls necessary to roll a specific number M times with a N sided die Disable 3-press emergency dial feature on Nokia G50 after visiting India Access Kurier upright calligraphic letters 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. Expected a property name. Change Component{Props} to Component<Props> if you want to implement a props interface. Installed babel and webpack, still giving this error: Test suite failed to run. SyntaxError: Unexpected token import. replit Inside it, copy and paste the following code: SyntaxError: Unexpected token, expected "</>" Ask Question Asked 6 years, 2 months ago. Also gone through this SO question, accepted answer is not working and another answer (adding react-native-web package) is giving some other problems. 3k 15 15 gold Unexpected token '<' Webpack/Babel/React - "Uncaught SyntaxError: Unexpected token :" 4. Which you can do by following this repl. Everything is doing great and the app is running as expected. As logical expressions are evaluated left to right, they are tested for possible "short-circuit" evaluation using the following rules: Unexpected token "<" in this case comes from a nested path. Modified 3 years ago. Unexpected token, expected ";" in react native. 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. 13. 2) : SyntaxError: Unexpected token ''. Hot Network Questions 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 Visit the blog Uncaught SyntaxError: Unexpected token '<' (React) Ask Question Asked 3 years ago. You can either I bought a theme who uses react and react redux. js:1 Uncaught SyntaxError: Unexpected token < An examination of the source reveals a copy of my index. Component. A simplified version of server/index. worker. ; So you final code should look like this, Uncaught SyntaxError: Unexpected token < with React. 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 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 Parsing error: Unexpected keyword 'export' Hot Network Questions Help with AnyDice calculation for 3d6, reroll the third 1 or the 3rd 6 in any score character-rolling. json file is as. SyntaxError: Unexpected token '<' React. Modified 1 year, 11 months ago. /Header'; const Layout = (props) => { return( <Fragment> Fix the common Uncaught SyntaxError: Unexpected Token < in React with our step-by-step guide. React. ReactJS Module build failed: SyntaxError: Unexpected token. 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. Reactjs with JSX: Unexpected token '<' 0. Hello again! After setting up bitbucket pipelines for building the project, I again stumbled upon the issue. 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 think your component should like this. Viewed 5k times 0 . ReactJS - JSON. unexpected token in javascript. /'));" to provide the location of the static resource file 'bundle. . 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 was working in React and I have the following component: &lt;DatePicker label="With dateFormat YYYY-MM-DD" onChange={action('onChange')} dateForm React: Uncaught SyntaxError: Unexpected token < in JSON at position 0. Do we have any solution to solve this problem. ReactJS - Module build failed: SyntaxError: Unexpected token react components not rendering. 1. and I make files index. json I'm developing a mobile app using React-Native and Expo. ts" pattern after "npm install": [React-Native][Jest]SyntaxError: Unexpected token import. The error is in the first curly bracket on the renderItem(). 2. And regarding your unexpected token, you were missing a : {something} statement after your test if How to fix babel react "Uncaught SyntaxError: Unexpected token <" 0. Davin Tryon Davin Tryon. Giving the full context of the erro: ({"Object. Share. It is not valid for JSX. import React, {Fragment} from 'react'; import Header from '. Follow answered Mar 18, 2019 at 14:24. Modified 7 years, 5 months ago. 1 but the nullish coalescing operator (??), is relatively new and was added in node v14. SyntaxError: Unexpected token typeof Not used typeof in the project but it's used in react-native package. scfpt cvdc sbtynze qrpubix lkgm cgwrn yemq riny cjsvdhl kpbxx gqvgb jqvhxssl zlpaj ndmlt fqamx