Uncaught syntaxerror unexpected token vercel react It collects links to all the places you might be looking at while hunting down a tough bug. I am developping a react application, using Netlify to build & deploy the app automatically on commit. ReactJS - JSON. g. My code is throwing syntax ReactJS: "Uncaught SyntaxError: Unexpected token <" Related. httpData (jquery. NextJS React - WebpackError: window is not defined. data - check the data is a valid JSON string or not. I am trying to make a React project without Node and I am calling a JS file from a HTML file. However, you haven't provided enough context for What file and line number are the errors reported on? How are you launching the app? If you're using the dev server, have you confirmed that the URL in the browser's address bar points to it? React: Uncaught SyntaxError: Unexpected token < in JSON at position 0. JsonConvert. Viewed 962 times -2 . app. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. How to programmatically navigate using I have included swagger in express and deployed on vercel. When I navigate to /api/revalidate/?pagePath=pageUrl&secret=REVALIDATE_TOKEN, with correct params , I get errors you see on image . Everything works fine, except I have a Twitter authentication call, which uses a callback. Uncaught SyntaxError: Unexpected token '<' (and the page does not load): Does anyone know how to fix it? The version of the main file is correct and checked nginx config and it is pointing to the build folder index. 9345ebBe. I'm trying to work React into my HTML page which I'm trying to create dynamic cards from bootstrap, but I keep getting Here's what I have so far ReactJS: "Uncaught SyntaxError: Unexpected token <" (13 answers) Closed 8 years ago. I'm working on a react project and trying to display a dialog with react-bootstrap. ES5 use getInitialState() to initialize the state variables i. I read some topics on stackoverflow too. js" is a link, when I click, It shows the below file and location, it's not You are using JSX syntax (e. 564. render. React. html. when i am using python manage. Components that are in the nested are late to read. worker. -index. This was ReactJS: "Uncaught SyntaxError: Unexpected token <" 1090. The issue was with how I located the js and css files in the index. js Links and prefetching fails throwing this SyntaxError. getinitialState() should be getInitialState(). Given below is my configuration for swagger Step 1: In the root of your project, you need a vercel. js:152) at In my case ( Webpack v. js files, leading to the SyntaxError: Unexpected token '<'. Modified 2 years, 4 months ago. The React app files are static and should be served as such, not interpreted as server-side JavaScript. 2361. Commenting out code to Uncaught SyntaxError: Unexpected token '<' Summary I am using Next 14 and created a sample create next app. This is the configuration file Vercel uses to understand how to handle your project. chunk. js, main. Modified 3 months ago. Ask Question Asked 7 years, 9 months ago. 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 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 Its complaining about all 3 . Why was this issue marked with the please add a complete reproduction label?. Do the one change in your snippet codes which it is given in above section. Thing is, Uncaught SyntaxError: Unexpected token < This was not appearing before and it started appearing yesterda Skip to main content. Ask Question Asked 7 years ago. I have a problem with react app. That said, I've read up on several similar-seeming bugs on here and on github and I can't find anything I have set it up just like in the tutorial. html entry point. SyntaxError: Unexpected token < in JSON at position 0. parse I believe the issue is that I am pulling a web token and the user data at once. Uncaught SyntaxError: Unexpected token '<' bundle. window. js files bundle. Thing is, Uncaught SyntaxError: Unexpected token < using angular 4 build run in browser. Uncaught SyntaxError: Unexpected token < in react-router with trailing slash in the end. 1:3000. I am having problem with react setup via CDN. Please add a reproduction in order for us to be able to investigate. I am setting up my first project, when I try to run the webpack-dev-server my code does not compile! Update Answer below is correct. parse at patchIncorrectLockfile (< project vercel / next. html$ - [L] RewriteCond %{REQUEST_FILENAME} Webpack/Babel/React - "Uncaught SyntaxError: Unexpected token :" 3. html How do I resolve SyntaxError: Unexpected token 'export' in react nextjs project? [duplicate] Ask Question Asked 2 years, 4 months ago. Here is the HTML page of one of my React apps. Would appreciate any suggestions. Provide details and share your research! But avoid . This has been asked before (for example ) but I can't find anything that applies to my situation. html folder. What version of Next. About; Products OverflowAI; Uncaught SyntaxError: Unexpected token < with React. inspectorsherlock asked If anyone understands what the solution is for this error, please let me know. 1 What browser are you using? Chrome What operating system are you using? macOs How are you deploying your ap 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 Alternatively, look at using React without JSX. Node 14. I am facing issues similar to the ones in this post: [Common Issue] Why do I see “Uncaught SyntaxError: Unexpected token <” errors? How can I use chunking or versioning for my assets at Netlify? Welp, I still cannot manage to find how to fix the issue. react js unexpected token export on export{default as Cards} 0. Transpile npm module in Next. Reload to refresh your session. Ask Question Asked 8 years, 5 months ago. 0. A <script /> tag that points to an HTML file instead of a JS file. js are you using? v14. I am able to build and run the app locally without any fail. How to get JSON object from Razor Model object in javascript We cannot recreate the issue with the provided information. Uncaught SyntaxError: Unexpected token '<' #533. 5 + React ) it was happen on pages with 2nd or more nested level of pages. ts in vue project). However, I tried to make a small app using only index. I just copied a working react-bootstrap snippet in a js file but it's not working for me, I'm having Uncaught Hi, @haothien1103 I guess the issue might be that you're trying to serve the frontend JavaScript files (React app) as backend Node. " is weird. min. SerializeObject(ViewModelObject); Next time, will save my time. Why? Who knows. SyntaxError: Unexpected token '<' Hot Network Questions In John 1:1-2, does "in the beginning" mean that the Son already existed or that he began to exist with God? One possible fix for this issue in Webpack version 5. I was encountering a similar issue but fixed by adding below line to the top of my entry file (which was main. You signed in with another tab or window. fa04b6. Modified 2 years ago. js I am new to react. VM4135:1 Uncaught SyntaxError: Unexpected token o in JSON at position 1 at JSON. Nextjs v14: Unexpected token < in JSON at position 15396. config. Json. However the problem is when i go to localhost:8000 I get Uncaught SyntaxError: Unexpected token < exception when I open the console in chrome devtools. Fetch in react always return (Unexpected token R in JSON at position 0) 1. Try Teams for free Explore Teams I am running an AJAX call in my MooTools script, this works fine in Firefox but in Chrome I am getting a Uncaught SyntaxError: Unexpected token : error, I cannot determine why. not exactly sure Here is a bit of my server file. json file is for a frontend React app with a nodejs backend) I have a react website which I am hosting inside a Docker container that is running Nginx, which I have running on Port 3000. global ||= window; Make sure to add that before any imports. Why am ReactJS SyntaxError: Unexpected token - ReactDOM. Unexpected token - React babel. A missing closing quote of a string literal. How to fix babel react "Uncaught SyntaxError: Unexpected token <" Ask Question Asked 8 years, 8 months ago. This error typically occurs when there Uncaught SyntaxError: Unexpected token "<" 2. However, any apps where the JS file contains React does not load in the browser. 5 npm: N/A Yarn: N/A pnpm: N/A Rel To replicate the error, all you have to do is create a new react app using create-react-app, install stockfish and add the above line. For some reason react was able to locate the files with out / prepend to source location. I don't know what's wrong and what should i do. js:49) at Function. parse(data) data - check the data is undefined or not. However, when I npm run build and the firebase deploy the app, the app is not running and is throwing the error: Uncaught SyntaxError: Unexpected token '<'. Now I want to test multiple components together, and I immedia Uncaught SyntaxError: Unexpected token '<' while deploying create react app to firebase hosting 4 Getting blank page when React App is deployed and hosted by firebase ReactJS Module build failed: SyntaxError: Unexpected token - ReactDOM. I'm guessing you were trying to do something like what is mentioned in this question: ReactJS: "Uncaught SyntaxError: Unexpected token <". wsgi When you run npm run build, Create React App will substitute %PUBLIC_URL% with a correct absolute path so your project works even if you use client-side routing or host it at a non-root URL. React/Node Uncaught SyntaxError: Unexpected token < Ask Question Asked 5 years, 11 months ago. py runserver 0. Other html I put in the template file gets rendered except the reactjs bundle. 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? Uncaught SyntaxError: Unexpected token < I've seen that there are several posts of this error, but I was not albe to fix the issue following those links. 0. This was as per the docs import { Stack Overflow | The World’s Largest Online Community for Developers Uncaught SyntaxError: Unexpected token < in the file main. 0 I encountered this issue, and fixed it following this answer. js:1 Uncaught SyntaxError: Unexpected token < An examination of the source reveals a copy of my index. js Public. Asking for help, clarification, or responding to other answers. Step 2: Update the vercel. Here is the This bug happens to us at random when hovering over some Next. However, when I refresh the page, the website works perfectly fine. I am posting this in a hope help others incase if they reach this far and still have not found a fix. I then have an instance of Nginx on my host machine, which I have a reverse proxy pointing to 127. js, vendor. Seeing solution mention "I change all the pages and components and layouts to arrow functions and it resolve the issue. js:1 Uncaught SyntaxError: Unexpected token "<" main. Learning ReactJS: Uncaught SyntaxError: Unexpected token import. react-router 4 does not update url with query parameters. You switched accounts on another tab or window. js SyntaxError: Unexpected token < 1. html -controllers. tsx. Closed memcpy1337 opened this issue Apr 16, 2021 · 2 comments Closed 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 < I've done few researches on this topic, people who had a similar problem solved it by adding property type="text/jsx" or type="text/babel" to their script tag, but that doesn't work in my case. Uncaught SyntaxError: Unexpected token export. Ask Question Asked 3 years, 1 month ago. Viewed 11k times 1a4953075f808eb6a767. Uncaught SyntaxError: Unexpected token < This is my . Understanding unique keys for array children in React. 6396d38a. htaccess file : RewriteEngine On RewriteBase / RewriteRule ^index\. js, uncaught SyntaxError: unexpected token < Ask Question Asked 8 years, 8 months ago. js:1 which is generated by the react build. Related. Viewed 46k times 26 . Correct minor spelling mistake here. Answered by jeffreylanters. Modified 4 years, 8 months ago. They said that maybe it's all about cache problem. Objectlist)) Code behind: string Objectlist = Newtonsoft. I've Webpack/Babel/React - "Uncaught SyntaxError: Unexpected token :" 4. Remove the <script> tag in public/index. VM505:2 Uncaught SyntaxError: Unexpected token < at Function. npm install --save-dev babel-plugin-transform-es2015-modules-commonjs I was able to arrive to this answer thanks to the comments especially @DrewReese. json file with the following content: (this vercel. I used to write a react app by using create-react-app and there was no problem. I am trying to deploy my django-react in azure vm. Viewed 7k times 3 . x. html and app. For import, Uncaught SyntaxError: Unexpected tokenFor JSX, Uncaught SyntaxError: Unexpected token <Is it because I did not install BABEL or ES6. Modified 7 years ago. Uncaught SyntaxError: Unexpected token < angular. Firebase deployed react app not working. To solve this, you need to eject the app and modify the webpack-dev-server configuration file. globalEval (jquery. <FaFacebook />) within a js file. js:30 Uncaught (in promise) SyntaxError: Unexpected token < in JSON at position 0 Project Structure: |---static Unexpected token < . html page. io and I keep getting the following error: Uncaught SyntaxError: Unexpected token import I have loaded babel twice now and have followed along the lesson as described, but it just Uncaught SyntaxError: Unexpected token < reactjs react-pdf. 6. As in create-react-app, webpack-dev-server is used to handle the request and for every request it serves the index. json: { "functions Uncaught SyntaxError: Unexpected token "<" 2. Here is the directory of my app: E-study -client -app -components -all the libraries are here. Viewed 19k times 7 . Uncaught SyntaxError: Unexpected token '<' Ask Question Asked 4 years, 1 month ago. 2. I have react working and Unity working however it seems like there is something up with the "Bridging system" between the two. js canary release Provide environment information Operating System: Platform: win32 Arch: x64 Version: Windows 10 Pro Binaries: Node: 14. Modified 8 years, 8 months ago. I think that was either a bug or just the app being rebuilt because of such a change busted some broken cache and things started working. Find my firebase. So you are getting . React SyntaxError: Unexpected token '<' Hot Network Questions Is there a specific named fallacy for bringing 'Uncaught SyntaxError: Unexpected token <' I believe it is my 'catch all' route in my express server which is serving up index. On launch ReactJS: "Uncaught SyntaxError: Unexpected token <" 0. For some reasons I am getting Uncaught SyntaxError: When I run vercel dev (locally- localhost:3000/api/v1), I see documentation as expected: However when I push my code to a branch which triggers a vercel build , I see the following: Checking the console, I see: "jquery Uncaught SyntaxError: Unexpected token '&'" spent several hours, actually, solution is simple: var json = @Html. tools. ). js -node_modules -server -config -server. Unexpected token "<" in this case comes from a nested path. Raw(Model. then storing them in local storage, but since there is nothing in local storage since this is a fresh boot, it's looking for the token that isn't there? SyntaxError: Unexpected token 'export' That's the function I'm trying to import: Unexpected token 'export' in react nextjs project? 11. My folder structure is as follows: My app was working perfectly fine just before i installed simple-react-bootstrap After installing it is now showing blank page and in console it's showing error: Uncaught SyntaxError: Unexpected I have a simple middleware setup that checks if the user is logged in using a boolean from the zustand store, and redirect the user to the login page accordingly. This is the option that you can do: React (router?) Uncaught SyntaxError: Unexpected token < 2. SO, I basically solved all the problems by adding / ahead of all source in the index. Any app I've created with vanilla JS I can upload along with the HTML and CSS files and it works fine. I believe Webpack 2 handles them out-of-the-box, but from your config, it seems like you are using Webpack 1, so you need to install a plugin for that:. 46. If a component is single, and not importing anything else, "npm test" runs smoothly. Some anti 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 Uncaught SyntaxError: Unexpected token '<' in React app. html$ - [L Verify canary release I verified that the issue exists in Next. How to Integrate React Epub Reader with next js. However the URL is totally fine and if copied and pasted in a new tab it will work perfectly. c> RewriteEngine On RewriteBase / RewriteRule ^index\. . React Router - Cannot read property 'history' of undefined. Summary When I run the command dev or build or start, I see this error: SyntaxError: Unexpected token < in JSON at position 15396 at JSON. bundle. You signed out in another tab or window. Stack Overflow. Basically the API is not available during build time IF you did not push the API before. This is my the public Netlify page: https: "Uncaught SyntaxError: Unexpected token <" Drilling into the code here: The "Uncaught SyntaxError: Unexpected token" exception occurs for multiple reasons: A missing or extra bracket, parenthesis or comma in your code. React Uncaught SyntaxError: Unexpected token. js And I Uncaught SyntaxError: Unexpected token '<' React Hot Network Questions Precision amplitude measurement of "high" speed load cell signal 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 you get Uncaught SyntaxError: Unexpected token u in JSON at position 0 then you could do the following quick checks:. To be able to investigate, we need access to a reproduction to identify what triggered the issue. js:259:29) "at layout. js:1. js:1 Here's my index. My first time using react, so apologies if I'm doing something obvious and incredibly wrong. I needed to add 'react' to babel Those who are using create-react-app and trying to fetch local json files. Instead, when I open up the console I receive this message, "Uncaught SyntaxError: Unexpected token '<' ". ts Ask questions, find answers and collaborate at work with Stack Overflow for Teams. ReactJS SyntaxError: Unexpected token. 0:8000 settings. In my case it is ok with next . Any idea? I asked my brother about his chrome version, his device, his setup, the steps to reproduce but no luck. 16. gunicorn --bind 0. 3. Viewed 13k times 9 . What can be the reason ? (react uncaught syntaxerror: unexpected token <) Fix the common Uncaught SyntaxError: Unexpected Token < in React with our step-by-step guide. jsObj = JSON. means JSON parsing failed because you somehow get HTML while expecting JSON. render with WebPack 4, Babel 7. Her is my html: <!DOCTYPE html Reactjs - Uncaught SyntaxError: Unexpected token < Ask Question Asked 5 years, 5 months ago. Identify and resolve I get this error intermittently: Uncaught SyntaxError: Invalid or unexpected token (at layout. Here i my simple component: import React from "react"; import Unity, { UnityContext } from "react-unity-webgl"; const unityContext = new UnityContext({ loaderUrl: Uncaught SyntaxError: Unexpected token '<' #178. htaccess: <IfModule mod_rewrite. data - check the data is corrupted by unwanted whitespace or not ECMAScript modules aren't something that any browser supports natively yet. json file. 0 Netlify deployment - Failed to fetch cache. but, when i am using . Swagger is working fine locaally but giving Uncaught SyntaxError: Unexpected token '<' in browser console when i deploy app to vercel. 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; ReactJS: "Uncaught SyntaxError: Unexpected token <" 1483 What are these three dots in React doing? 532 Uncaught SyntaxError: Unexpected token : 3 Uncaught SyntaxError: Unexpected token < with React. 5. 15. Errors were raised in Chrome to import and JSX. Modified 6 years I'm trying out the code from egghead. In most default configurations, this should be OK but your web pack configuration might have been changed to only process In order to have a bare minimum setup with react (with no compilation step), you need either to use React. I am just trying to make a simple example to learn. e React. Stuck on an issue? Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. js. html When I build and deploy a create-react-app to Netlify I don’t get any errors, but the result is a blank page. Hello. js are you using? 11 What version of Node. Be sure to remove defition of global from vite. createElement syntax instead of JSX tags (check Hello! Every time I attempt to render my reactapp, the same error "Uncaught SyntexError: unexpected token '<' " appears despite changing nothing in If you have been working with ReactJS, you might have encountered the error message “Uncaught SyntaxError: Unexpected token <“. Load 7 more related questions Show fewer related questions I am new to React and Webpack. This is my code. createClass(. js:1 I'm sure it means backend returns HTML page to them instead of JS code. Uncaught SyntaxError: Unexpected token & when rendering the client after having rendered correctly the server. 0:8000 it is working fine. parse error: SyntaxError: Unexpected token ' in JSON at position 1. When I deploy without changing any default settings, I will get this "Uncaught SyntaxError: Unexpected token <" error and nothing shows up on the screen. 1. 6 I am now using React Jest to test code. I've met the same problem. vuhu ygpd avfbjfxk qxvkpp zzdarc mqok rmd dpfvv ymxkz dujxak xwih efbmf iivrks ehkkdf fnxiol