syntaxerror: cannot use import statement outside a module jest

To learn more, see our tips on writing great answers. Bug Report $ jest --no-cache FAIL test/mainA.test.js Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. __tests__ directory or files with .test or .spec suffix, e.g. What am I missing? the full information is here; https://babeljs.io/docs/en/babel-node. @lean's StackOverflow link helped me solve this issue. I'm seeing this with crossfilter2 with jest unit tests. Issue with Jest + NextJS - SyntaxError: Cannot use import statement outside a module. Describe the bug When I add MDX documentation files into my Storybook and run Storyshots with Jest I'm getting SyntaxError: Cannot use import statement outside a module for each of loaded MDX. My issue was different in a way that jest would stumle on .js files from one of the dependencies in node_modules with SyntaxError: Cannot use import statement outside a module.. Which makes trying to access es6 modules from CommonJS painful to say the least. Literature about the category of finitary monads. When should I use curly braces for ES6 import? You can interpret individual files as CommonJS by using the .cjs extension. All the node modules. I have tried most of the suggestions made here. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. However, there are some caveats to using TypeScript with Babel. Your jest.config.js looks good to me. transform Now if you run your test, it will have that dreaded error, Specifically it is caused because of importing from antd/es/. What positional accuracy (ie, arc seconds) is necessary to view Saturn, Uranus, beyond? ', referring to the nuclear power plant in Ignalina, mean? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Embedded hyperlinks in a thesis or research paper. Yep, this did it where as trying "type" : "module" made it all of the sudden say "require is undefined". Well occasionally send you account related emails. Making statements based on opinion; back them up with references or personal experience. ex: jest.mock('rehype-raw/index.js', () => jest.fn()); I tried a lot of answers here, but nothing worked for me. This isn't really what a module is. For those who are running into this issue only on CircleCI, I was finally able to fix it there, the issue was that I hadn't added jest.config.js and babel.config.js to .circleci/config.yml's persist_to_workspace paths, so the files were being deleted between jobs when the workspace was reattached for tests after checking out the repo and building. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? An upgrade from Jest v23 to v24 resolved the issue. 2 . How a top-ranked engineering school reimagined CS curriculum (Ep. TypeScript. Did you already use type:"module" in package.json? import axios from 'axios'; <-- put at top of file. What does the power set mean in the construction of Von Neumann universe? Effect of a "bad grade" in grad school applications. Why is this not included in. Can I general this code to draw a regular polyhedron? Which ability is most related to insanity: Wisdom, Charisma, Constitution, or Intelligence? Most jest configurations are not (re-)compiling files from the node_modules directory, so make sure to import the CJS/UMD/ES6 version of your dependency, and not the ESM version. I am having this issue with @react-native-firebase/app v6. Which was the first Sci-Fi story to predict obnoxious "robo calls"? Is there a way to have jest prefer the commonjs version main instead of module? Literature about the category of finitary monads. This error also comes when you run the command. Parabolic, suborbital and ballistic trajectories all follow elliptic paths. ', referring to the nuclear power plant in Ignalina, mean? We could use babel-jest or ts-jest. How to resolve "Cannot use import statement outside a module" from Jest when running tests? @ahnpnl or @FrozenPandaz 's solution is not working for me. I think you maybe be thinking of it in terms of node modules which seems like a program within your program. You may want to check that you are also mapping your .js files to a transformer.. For example, if you are using TypeScript, the transform property of your jest.config.js should look like : Thank you. Solved mine by adding "modules": "commonjs" inside .babelrc -> presets -> @babel/preset-env. How about saving the world? Says it was resolved by adding "type=module" but this would typically go in the HTML, of which I have none. By default, jest looks for test files by matching files inside of a I found this answer the most clear explanation to OP. Looking for job perks? Embedded hyperlinks in a thesis or research paper, Generic Doubly-Linked-Lists C implementation. I had to delete the, Jest: node.js SyntaxError: Cannot use import statement outside a module. density matrix. This issue has been automatically locked since there has not been any recent activity after it was closed. It's not them. In my case. Based on the documentation, it will: TypeScript and JavaScript files (.ts, .tsx, .js, .jsx) will be transformed by ts-jest to CommonJS syntax. As a relative beginner to configuring jest, I had a hard time figuring out why this error was happening on my project. out my TypeScript-specific article - Why does contour plot not show point(s) where function has a discontinuity? The Find centralized, trusted content and collaborate around the technologies you use most. Some times jest holds a cache somewhere inside node modules and certain changes might corrupt it. To start, you can use the env preset, which enables transforms for ES2015+. Tikz: Numbering vertices of regular a-sided Polygon, Generic Doubly-Linked-Lists C implementation, Futuristic/dystopian short story about a man living in a hive society trying to meet his dying mother, Understanding the probability of measurement w.r.t. Posted a working configuration here https://stackoverflow.com/a/63118113/6456392. Would the "Cannot use import statement outside a module" rule apply to main-file.js (since it is not a module)? Your answer could be improved with additional supporting information. My full config if anyone is interested What you need to understand is Next.js will tell Jest to not transform packages under /node_modules except those defined in their config file (the transpilePackages property). My solution was to include babel-node path while running nodemon as follows: You can add in your package.json script as: NOTE: My entry file is index.js. You can learn more about the related topics by checking out the following Understanding the probability of measurement w.r.t. SyntaxError: Cannot use import statement . Same I also (already) added to the TS compilerOptions. Question: Jest + Typescript + threads.js how can it work together ? I couldn't get rid of this SyntaxError: Cannot use import statement outside a module error no matter what I have tried and it got so frustrating. After reading carefully about presets, I realized, that it leaves them 'as-is' with preset: 'ts-jest'. I solved the f***ing thing by migrating the .babelrc file to babel.config.js! New replies are no longer allowed. If you want that, you can use ts-jest instead, or just run the TypeScript compiler tsc separately (or as part of your build process). Find centralized, trusted content and collaborate around the technologies you use most. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. By clicking Sign up for GitHub, you agree to our terms of service and When I used sequelize migrations with npx sequelize db:migrate, I got this error, so my solution for this was adding the line require('@babel/register'); into the .sequelizerc file as the following image shows: Be aware you must install Babel and Babel register. What did you put in your jest.config.js to avoid the "Cannot use import statement outside a module" error? How to check for #1 being either `d` or `h` with latex3? On what basis are pardoning decisions made by presidents or governors when exercising their pardoning power? I will update the original with dependencies, though. Here are the dependencies I started with: Verify that you have the latest version of Node.js installed (or, at least 13.2.0+). Making statements based on opinion; back them up with references or personal experience. This will ensure that all .js and .mjs files are interpreted as ES modules. Considering that the main unit test frameworks Jasmine Jest etc don't handle this at all well it leaves me thinking that until there is better interop support the whole Node es6 situation seems half baked to me, but I'd love to be proven wrong. However, I encounter a SyntaxError: Cannot use import statement outside a module for components where I import rehype-raw. node --experimental-vm-modules node_modules/.bin/jest or NODE_OPTIONS=--experimental-vm-modules npx jest etc.. On Windows, you can use cross-env to be able to set environment variables. Not the answer you're looking for? I had to make sure, that ts-jest wouldn't ignore (when transforming) .js files in troublesome dependency.. After reading carefully about presets, I realized, that it leaves them 'as-is' with preset: 'ts-jest'. Simply put, with the node command we will have to run the JavaScript file (filename.js) and not the TypeScript file unless we are using a package like ts-node. In your package.json file make the following changes: Create a babel.config.json config in your project root and enable some presets. Jest doesn't support ES6 module and hence throwing this error when you directly run the test with Jest. Won't require type: module in package.json. SyntaxError: Cannot use import statement outside a module might also come from some imported library under node_modules, for example.\node_modules\node-fetch\src\index.js:9 import http from 'node:http'; ^^^^^ The trick for me was to use the transformIgnorePatterns option in jest config: How about saving the world? Plot a one variable function with different values for parameters? I have this issue when I'm trying to run the tests with this configuration: jest.config.js module.exports = { verbose: true, preset: 'react-native-web' } babel.config . could you explain why should we tweak like this? them. I replaced it with nodemon and surprisingly it worked! What are the advantages of running a power tool on 240 V vs 120 V? Option 1. Using jest@24.9.0 from react-scripts@3.3.0 importing crossfilter2@1.5.0. I was able to switch to axios without a problem. Can you post the solution if this works please? Which ability is most related to insanity: Wisdom, Charisma, Constitution, or Intelligence? Another way to solve it is and possible other subsequent issues regarding babel and typescript is to use ts-jest, quoted from Jest's getting started. privacy statement. @GunarGessner is there a particular reason why .babelrc doesnt work? Please note this issue tracker is not a help forum. Just to be more specific: this approach is a double ignore for transpiling TypeScript npm dependencies in the node_modules directory. How to create a virtual ISO file from /dev/sr0, Understanding the probability of measurement w.r.t. For me it has cropped up when upgrading to the new react-native-modal-datetime-picker module that has an import and export default in it's index.js file and is isolated to our jest unit tests. Therefore, you have 2 choices: Jest now ships with experimental support for ECMAScript Modules (ESM): https://jestjs.io/docs/ecmascript-modules. Since jest is not working with esmodules well, you need to add these configurations in jest.config.js to tell Jest to use commonJS builds instead, might also come from some imported library under node_modules, for example. Checking Irreducibility to a Polynomial with Non-constant Degree over Integer, English version of Russian proverb "The hedgehogs got pricked, cried, but continued to eat the cactus". Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. Connect and share knowledge within a single location that is structured and easy to search. Any tips? '@babel/plugin-proposal-class-properties', "react-native-keyboard-aware-scroll-view", "node_modules/(?!(jest-)?react-native|react-clone-referenced-element|@react-native-community|expo(nent)?|@expo(nent)?/.*|react-navigation|@react-navigation/.*|@unimodules/.*|unimodules|sentry-expo|native-base|@react-native-firebase/.*|react-native-firebase)". By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. I have no idea what's causing this, and the fact that it only happens in my Heroku environment has me scratching my head even more. I didn't need a transform field, since the preset is already on it. You can just use the below changes. The main problem is this new "module" subtype of JavaScript is yet known to most servers or clients (modern HTML5 browsers). This fixes a different error where parse5 can not be found. I need help please ! I've trawled through a lot of docs but it just doesn't seem to run any longer. But I don't see how the suggestion to use import() to access es6 module in CommonJS is useful. Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower? Hope this will help https://xperimentalhamid.com/how-do-i/fix-cannot-use-import-statement-outside-a-module/, and how can i solve this problem in a vue project using @vue/composition. so even if I add, thank you! What does the power set mean in the construction of Von Neumann universe? Could you also share your dependencies? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. I have this issue when I'm trying to run the tests with this configuration: The text was updated successfully, but these errors were encountered: I am also seeing this issue. Can the game be left in an invalid state if all state-based actions are replaced? To learn more, see our tips on writing great answers. There is a jest.config.js file, there is jest config section in package.json. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". I also searched for package.json on my macbook but I see a lot of package.json files. @Cocuba answer is spot on and should be the accepted answer because it actually transpiles. The trick for me was to use the transformIgnorePatterns option in jest config: How to setup jest with node_modules that use es6. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, Next.js Cannot use import statement outside a module in third party library, "Uncaught SyntaxError: Cannot use import statement outside a module" when importing ECMAScript 6, SyntaxError: Cannot use import statement outside a module, Jest: Cannot use import statement outside a module, Jest or Mocha with Vue: SyntaxError: Cannot use import statement outside a module, Jest + Vue3 + @Vueform/slider "SyntaxError: Cannot use import statement outside a module", Jest and Babel transpilation - SyntaxError: Cannot use import statement outside a module, Converting jest test to typescript: SyntaxError: Cannot use import statement outside a module. To learn more, see our tips on writing great answers. Making statements based on opinion; back them up with references or personal experience. However, is main-file.js a module too? Required by hast-util-raw, Add transformIgnorePatterns however right at the end. Instead, ts-node might be the perfect replacement. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, I had hoped it would make life easier! I also can prove that the babel-jest transform produces code that still contains that top-level import that Jest doesn't seem to like. Even though I have tried them separately, I haven't tried them together (transform and transformIgnorePatterns). I was under the impression "esnext" was the "best", but that was just a mistake. (Basic jest, vue-jest and vue-test-utils setup is not enough to get started, requires more setup and leads to unexpected errors), CI: Migrate .babelrc into babel.config.js, Replace vue-markdown with vue-markdown-render. So this jest configuration solved my issue: My issue was different in a way that jest would stumle on .js files from one of the dependencies in node_modules with SyntaxError: Cannot use import statement outside a module. Can the game be left in an invalid state if all state-based actions are replaced? This is my personal experience. Already on GitHub? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, After googling for many days and trying all other solutions, nothing else worked, except for this. For anyone using babel instead of ts-jest, also rename your .babelrc to babel.config.json see: which jest config? !rehype-raw)/"] should allow transformation of the rehype-raw but no other module. I solved the fucking thing by migrating the .babelrc file to babel.config.js! This happens e.g. Jest Typescript with ES Module in node_modules error - Must use import to load ES Module: Jest or Mocha with Vue: SyntaxError: Cannot use import statement outside a module, Jest and Babel transpilation - SyntaxError: Cannot use import statement outside a module. Inside these files I am using es6 modules. As an alternative, simply running the package.json script using. JavaScript before they are run because jest on its own cannot understand Next, in file package.json you change your npm command to enable experimental ES6 support for Jest, and configure Jest to do it. Why? Looking for job perks? Then do one of the following, as described in the documentation: In the nearest parent package.json file, add the top-level "type" field with a value of "module". Here's what is in my package.json and it works perfectly: Just a quick reminder for everyone (including my future self in about 6 months Hi Yes, I'm talking to you! Can someone explain why this point is giving me 8.3V? How about saving the world? There is currently no angular jest preset, that works with ngx-toaster *.mjs By default, if Jest sees a Babel config, it will use that to transform your . The simplest way forward is to update your test script to execute node with --experimental-vm-modules e.g. The TypeScript jest error occurs when Jest is misconfigured in a TypeScript This can be configured using transformIgnorePatterns. The TypeScript jest error "Cannot use import statement outside module" occurs Right now, the only way to do that is to either create a HTTP content-type on the server of "module" for any file with a .mjs extension and change your file extension on module JavaScript files to ".mjs", or have an HTML script tag with type="module" added to any external