Jest syntaxerror unexpected token react js In my case, the package react-navigation module need to be translated. So I added transformIgnorePatterns to my jest configuration and everything worked: Jan 19, 2021 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. from 'react Jan 23, 2015 · I am trying to get started building a site in ReactJS. I tried a Jan 22, 2022 · I'm using jest to test a react TypeScript app. Here' s what you can do: Jan 25, 2017 · SyntaxError: Unexpected token . json file contains: See full list on dev. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. Provide details and share your research! But avoid …. Asking for help, clarification, or responding to other answers. Mar 17, 2020 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. scss' ); and then using Jest, it is throwing the unexpected token ". g. . json file contains: Jun 28, 2019 · I'm want to test a component in a React app using Jest Enzyme with TypeScript. May 21, 2023 · If you are encountering the `SyntaxError: Unexpected token ‘export’` error while running Jest tests on your JavaScript files, it is likely because your JavaScript code is using a feature that Jest by default won't compile files in the node_modules directory. By default jest doesn't transform ES6 js code from node_modules. that's why by default jest doesn't transform node_modules. This usually means that you are trying to import a file which Jest cannot parse, e. May 25, 2022 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Jan 25, 2017 · SyntaxError: Unexpected token . Here' s what you can do: Jun 27, 2023 · In this blog post, we will explore how to leverage transformIgnorePatterns effectively, providing a final fix for unexpected token errors and ensuring smooth testing experiences. Here's what you can do: Dec 24, 2023 · When running Jest tests with tsx (or jsx) React components, you might encounter the " SyntaxError: Unexpected token '<' " error like the following: Jest failed to parse a file. To solve this, you can change your test script to the below: "test": "react-scripts test --transformIgnorePatterns 'node_modules/(?!(<your-package-goes-here>)/)'", Feb 23, 2021 · If you Google "jest unexpected token", there are several signs that this is a really nasty issue: There are a great many threads on the issue - on Stack Overflow and otherwise. Modified 1 year, Node. Sep 9, 2023 · Name *. Default: ["/node_modules/"] An array of regexp pattern strings that are matched against all source file paths before transformation. css' ); require( '. A lot of node modules export ES5 so that jest can run it out of the box without transform. This is the test I'm running: import { render, screen } from '@testing-library/react' import { toBeInTheDocument } from '@testing-library/jest-dom' i May 9, 2023 · TS react Jest SyntaxError: Unexpected token '<' Ask Question Asked 1 year, 9 months ago. The threads span a number of years - meaning that the issue keeps cropping up for people repeatedly. Website. Save my name, email, and website in this browser for the next time I comment. Jan 25, 2017 · SyntaxError: Unexpected token . Jul 9, 2019 · Trying to set up Jest to test my React components (Technically I'm using Preact) but same idea Anytime I try to get a coverage report, I get errors when it hits any jsx syntax. Jan 18, 2020 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. /style/jnpr-datatable. /style/fixed-data-table. it's not plain JavaScript. to Jun 28, 2024 · Jest encountered an unexpected token. " error. it 's not plain JavaScript. js - SyntaxError: Unexpected token import. Jun 28, 2024 · Jest encountered an unexpected token. Sep 5, 2018 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. There must be something wrong in my settings, but where? My package. This happens e. transformIgnorePatterns [array] . Email *. Sep 23, 2024 · I've encountered similar errors before, so here are my thoughts: That's good that you have the ResizeObserver mocked and it's in your setupFiles (that's often forgotten to add it there). 910 I figured it out. Jest encountered an unexpected token. However, when I tried to put my JS in a separate file, I started getting this error: "Uncaught SyntaxError: Unexpected token <". By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". Here' s what you can do:. I follow the instructions on the Jest site, but for some reason I get: SyntaxError: Unexpected token < I can test I have issues with Jest picking up an internal library, Jest would display 'unexpected token' errors wherever I had my imports from this library. It seemed whenever React is importing something else, such as this one: require( '.
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