Syntaxerror unexpected token export jest react native. This happens e. I'm want to test a component in a React app using Jest Enzyme with TypeScript. The Headache 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. I created an NPM package that uses modern JavaScript. Dec 20, 2025 · In this blog, we’ll demystify why this error happens, explore common causes, and walk through actionable solutions to resolve it. This can be an issue if an ES Module-only package, such as react-markdown, is not pre-transpiled. Many of the threads are long. I'm using jest to test a react TypeScript app. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". js. export and all those other aging conven Sep 15, 2024 · By default, Babel excludes Node modules from transformation. This is the test I'm running: import { render, screen } from '@testing-library/react' import { toBeInTheDocument } from '@testing-library/jest-dom' i Problem solution for SyntaxError: Unexpected token export when running jest in react-native-picker Picker The problem being faced is related to the configuration of Jest, a popular JavaScript testing framework. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. The threads span a number of years - meaning that the issue keeps cropping up for people repeatedly. May 29, 2024 · Description I am encountering an "Unexpected token 'export'" error when running Jest tests for a React Native project using React Native Testing Library. config. Because vitest does not export the Jest globals (like describe), you can either set globals: true, or manually import the required keywords in your test. Jest encountered an unexpected token Jest failed to parse a file. I follow the instructions on the Jest site, but for some reason I get: SyntaxError: Unexpected token < I can test Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. Oct 19, 2025 · The SyntaxError: Unexpected Token 'export' error in Jest TypeScript projects can be a common roadblock, but by understanding the root causes and following the usage methods, common practices, and best practices outlined in this blog post, you can effectively resolve this issue. g. I can assure you that I was receiving the error "Jest gives an error: "SyntaxError: Unexpected token export"" and the above change worked to remove this error. it's not plain JavaScript. This issue appears to be related to the transformation of ES6 module syntax in cert Jest : SyntaxError: Unexpected token export #38 Closed never00miss opened on Feb 17, 2020 · edited by never00miss ES Modules use the export syntax to export a module, while CommonJS uses the exports object. Jest uses Babel to compile JavaScript ES Modules to CommonJS, using the @babel/plugin-transform-modules-commonjs Babel plugin. Learn how to unit test Expo apps using Jest and React Native Testing Library, with solutions for mocking AsyncStorage, Redux, and React Navigation. This time I'm going to talk about a specific error: SyntaxError: Unexpected token 'export'. I refuse to write my packages with old-skool require() and module. I installed react-native-radio-buttons-group and I have this error: Details: Have you configured jest together with react-testing-library and now gotten Jest SyntaxError: Unexpected token 'export' when building? I tried multiple things, like modifying . I have a problem to configure jest with react-native, when I install a third library I have SyntaxError with jest. babelrc and some dependencies, moduleNameMapper and transformIgnorePatterns in jest. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration. By "modern", I mean ES2015-compliant JavaScript (which honestly doesn't feel all that modern to me, but NPM & Jest seem to be stuck in the 2013 glory years of CommonJS - so, whatever). Perhaps it was slower as you mention, but at least the tests worked. Whether you’re using lodash-es, vue-esm, or another ESM package, this guide will help you get your tests running smoothly. JEST - SyntaxError: Unexpected token 'export' with uuid library Asked 3 years, 6 months ago Modified 3 months ago Viewed 63k times. A: To fix the syntax error “unexpected token ‘export'” in Jest, you will need to make sure that the variable or function that you are trying to export is declared in the current scope. If your project uses TypeScript, Jest transforms your TypeScript files to JavaScript using the babel-jest transformer. For a basic project, that's all that's needed. Olek Posted on Dec 23, 2020 Jest SyntaxError: Unexpected token 'export' # jest # react # testing # rtl In this post, I'm not going to explain how to configure react-testing-library and Jest, there is a lot of useful information about it. cd7m, or4du, eenhj, m8jx, gqn025, wqbu, sfbtg, bsmmkt, g1ag, acfra,