Nextjs jest syntaxerror unexpected token export. This happens e. g. To fix this, you need to e...
Nextjs jest syntaxerror unexpected token export. This happens e. g. To fix this, you need to explicitly tell Jest to transform jose instead of skipping it. Jan 30, 2022 · Jest: SyntaxError: Unexpected token 'export' Ask Question Asked 4 years, 1 month ago Modified 4 years, 1 month ago Jun 28, 2019 · I'm want to test a component in a React app using Jest Enzyme with TypeScript. Feb 23, 2021 · 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. js and Node. . Sep 12, 2025 · By default, Jest ignores everything inside node_modules for transformation. Jest uses Babel to compile JavaScript ES Modules to CommonJS, using the @babel/plugin-transform-modules-commonjs Babel plugin. Jan 2, 2024 · When you see a SyntaxError complaining about an unexpected ‘export’, you are mostly dealing with an incompatibility between module types. Oct 30, 2023 · Jest encountered an unexpected token Jest failed to parse a file. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration. In your case, lodash-es specifically exposes ES modules, which will need to be built by Jest via babel. Oct 30, 2019 · For me, the following: ` "test": "NODE_OPTIONS='--experimental-vm-modules --experimental-specifier-resolution=node' jest",` doesn't fix the error, but instead changes it from SyntaxError: Cannot use import statement outside a module to Must use import to load ES Module: The Jest SyntaxError: Unexpected Token 'export' error occurs when you try to export a module in your Jest test file but you don't use the export keyword correctly. js default to CommonJS modules. Unfortunately, I get an error when I run the tests, complaining about the very first es6 feature they run in to in the source file (SyntaxError: Unexpected token export). Next. Nov 30, 2022 · I'm trying to write a test case in a NextJS application using Jest. The threads span a number of years - meaning that the issue keeps cropping up for people repeatedly. I'm trying to import a functions from a dependency to my next/react functional component, but somehow I keep getting the following error: SyntaxError: Unexpected token 'export' That's the functio Jest encountered an unexpected token Jest failed to parse a file. On running the test, below error occurs: Q: How can I fix the syntax error “unexpected token ‘export'” in Jest? 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. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. Many of the threads are long. 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. Sep 15, 2024 · ES Modules use the export syntax to export a module, while CommonJS uses the exports object. I follow the instructions on the Jest site, but for some reason I get: SyntaxError: Unexpected token < I can test Jan 22, 2022 · Jest encountered an unexpected token Jest failed to parse a file. You can try narrowing your whitelist down so Jest doesn't try to pass every JavaScript file within node_modules through babel. Mar 30, 2023 · Jest failed to parse a file. oujecqguxcivbufrnbdeaytqlykkomjnuispuizrrgexexahgrqnlj