274. I had to make sure, that ts-jest wouldn't ignore (when transforming) .js files in troublesome dependency. I freaking prevented myself from committing my jest.config.js file by including all *.js in my .gitignore. Using jest@24.9.0 from react-scripts@3.3.0 importing crossfilter2@1.5.0. difference between import and require. SyntaxError: Cannot use import statement outside a module, with What positional accuracy (ie, arc seconds) is necessary to view Saturn, Uranus, beyond? You override antd DatePicker to use day js instead of default moment js. "Signpost" puzzle from Tatham's collection. I had the same issue and the following has fixed it (using Node.js 12.13.1): More information: https://nodejs.org/api/esm.html. (The module I'm having problems with does not have a dist/cjs folder. Reproducible repo: https://github.com/hutber/cannotusestatement. How can I mock an ES6 module import using Jest? I had to delete the, Jest: node.js SyntaxError: Cannot use import statement outside a module. Would you ever say "eat pig" instead of "eat pork"? 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 will document the steps as a checklist. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. I recently had the issue. I found some of the differences between CommonJS and ES6 JavaScript: Add "type":"module" in the package.json file, Example: import jwt_decode from jwt-decode, Lambda handler method code should be define like this, Don't add "type":"module" in the package.json file. Adding EV Charger (100A) in secondary panel (100A) fed off main (200A). I have a sinking feeling that things have changed between jest v26 and v27. They should go to devDependencies instead. This is a React, Typescript, Webpack project. MUI5 not working with jest - SyntaxError: Cannot use import statement Have a question about this project? By default, jest looks for test files by matching files inside of a __tests__ directory or files with .test or .spec suffix, e.g. What is scrcpy OTG mode and how does it work? Edit: this is very odd, because it seems like module is not actually supported , Edit: OK, it's because I'm explicitly importing the module path version, because the thing I want isn't exported from the default entry . I found Jest to be quite painful to install correctly, whereas Vitest works out of the box without any config. Can you explain your solution? The problem is the developers of Module JavaScript files incorrectly associated Modules with a new ".mjs" (.js) extension, but then assigned it a MIME-type server type of "text/javascript". Jest encountered an unexpected token. Just use the default export, so change line 20 to: Then in your Select.test.tsx file change to: Finally to fix the import issue change your code in Select.tsx to: This is a fairly common issue as can be seen in this mui-org GitHub link. How a top-ranked engineering school reimagined CS curriculum (Ep. Is it safe to publish research papers in cooperation with Russian academics? console.warn Unexpected error: SyntaxError: Cannot use import statement outside a . Example: I'm new to Node.js, and I got the same issue for the AWS Lambda function (using Node.js) while fixing it. Code snippets. ', referring to the nuclear power plant in Ignalina, mean? ', referring to the nuclear power plant in Ignalina, mean? Rename your .babelrc to babel.config.json https://babeljs.io/docs/en/configuration#whats-your-use-case. What does the power set mean in the construction of Von Neumann universe? I recommend using ts-jest for simplicity. Plot a one variable function with different values for parameters? This turned out to be pretty specific to our codebase and having NODE_ENV set to production in our test environment. Which was the first Sci-Fi story to predict obnoxious "robo calls"? In my configurations ts-jest + jest-puppeteer I added the following transform property to jest.config.js: I could resolve the issue with this help: As I said, this did not work adding directly into the config for som reason. Why typically people don't use biases in attention mechanism? How can I mock an ES6 module import using Jest? Sounds obvious and is definitely RTFM, but it took me a while to find this . In my case I'm using nextJs, and I solved my problem removing "next/babel" preset when I'm on Test enviroment (For any reason, using "next/babel", console shows the error: "SyntaxError: Cannot use import statement outside a module"): @kauecastro NextJS is very nice. Can the game be left in an invalid state if all state-based actions are replaced? I found this answer the most clear explanation to OP. . By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. On what basis are pardoning decisions made by presidents or governors when exercising their pardoning power? What differentiates living as mere roommates from living in a marriage-like relationship? Instead of using the default "preset": "ts-jest", try use presets like "preset": "ts-jest/presets/js-with-ts". Effect of a "bad grade" in grad school applications. that worked! Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. @blu10 it just didn't work for me I guess, OP didn't try to make it work for typescript, This worked for me when I got the error on an import statement for the node module. What is more worrying is: https://codesandbox.io/s/vigilant-bartik-bmz8x in the sandbox the tests pass. Looking for job perks? Plot a one variable function with different values for parameters? What were the poems other than those by Donne in the Melford Hall manuscript? I'm sorry to not put direct code on this post, it would make things unclear. Where is exactly does this configuration reside? I will update the original with dependencies, though. Is there a generic term for these trajectories? Learn more about Teams Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Any insight you have on this issue would be appreciated. By default, if Jest sees a Babel config, it will use that to transform your . I have no doubt that the issue is my jest does not compile the node_modules that would be needed for running my tests. Ah, the main version on npm is the old 3.x. Remember this is for nodejs example: like an expressJS server! Hi everyone, I'm workin' with a webpack.config.js'and main.js files, but I'm still getting errors, it must be the node version, I've the latest v14.4.0 and I'm still getting these errors. Please open a new issue for related bugs. rev2023.4.21.43403. This thread has some discussion + code I've found valuable when the OP's issue happens for me: There was a bug in next/jest but it was fixed and everything works for me right now. Counting and finding real solutions of an equation. Step 3: Execute your script. Files including node modules must either end in .mjs or the nearest package.json file must contain "type": "module". Not the answer you're looking for? option ensures that your TypeScript test files are transformed with ts-jest. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, I tried next/js as described in the docs and also extended the custom jest config, but I still get. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Running yarn test: arn run v1.22.4 $ jest FA. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Plot a one variable function with different values for parameters? How can I control PNP and NPN transistors together from one pin? Because TypeScript support in Babel is purely transpilation, Jest will not type-check your tests as they are run. First think I realized: the preconfigured workspace does not log anything, not even into ts-jest.log, not with --verbose or --debug and not even the warning, that would have been: Got a .js file to compile while allowJs option is not set to true (file: {{path}}). I've also tried using my project's old presets: But that gets me another error: "Error: Plugin/Preset files are not allowed to export objects, only functions.". By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Find centralized, trusted content and collaborate around the technologies you use most. Therefore, you have 2 choices: Jest now ships with experimental support for ECMAScript Modules (ESM): https://jestjs.io/docs/ecmascript-modules. There is an Algorithm to use import in NodeJs follow steps bellow : in Linux and Mac OS : 1: create project directory with test name > mkdir test and then change directory to test > cd test. This is not really an option if the problem is under node_modules/ right? Asking for help, clarification, or responding to other answers. As a relative beginner to configuring jest, I had a hard time figuring out why this error was happening on my project. npm i -D ts-jest @types/jest or yarn add --dev ts-jest @types/jest, Option 1: create a jest configration file jest.config.js, Option 2: add jest configration into package.json. Why does Acts not mention the deaths of Peter and Paul? Which was the first Sci-Fi story to predict obnoxious "robo calls"? I have an angular library in the Nx workspace that utilizes the ngx-translate library which is working when I serve the app in the workspace but the libraries jest tests fail for the components using either the translate service or pipe. Jest - SyntaxError: Cannot use import statement outside a module. Or give a link to documentation about moduleNameMapper? Has depleted uranium been considered for radiation shielding in crewed spacecraft beyond LEO? Beyond that, we attempt to follow node's logic for activating "ESM mode" (such as looking at type in package.json or mjs files), see their docs for details. Has depleted uranium been considered for radiation shielding in crewed spacecraft beyond LEO? In newer version of jest, babel-jest is now automatically loaded by Jest and fully integrated. If I run my test, I can see that the error has been resolved and my test passes. *I'm sure the root of my problem is that I'm not even sure what's complaining about the issue. privacy statement. The transform option ensures that your TypeScript test files are transformed with ts-jest. Reference: Node.js supports esm syntax only from v16, but jest doesn't support it yet. instead of name of module? Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower? How about saving the world? Shocker. You can interpret individual files as CommonJS by using the .cjs extension. SyntaxError: Cannot use import statement outside a module SyntaxError: Cannot use import statement outside a module (typescript I am using netbeans. https://docs.netlify.com/functions/build-with-javascript/#automated-dependency-bundling. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, Importing in Node.js: error "Must use import to load ES Module", Problem with loading "ES module" when importing in node js, Cannot use import statement outside a module when importing "uuid", SyntaxError: Cannot use import statement outside a module (Type Script), "Cannot use import statement outside a module" (Cloud Convert API), web scraping SyntaxError: Cannot use import statement outside a module, import React, { useState } from 'react'; ^^^^^^ SyntaxError: Cannot use import statement outside a module, I get "SyntaxError: Cannot use import statement outside a module." This usually means that you are trying to import a file which Jest cannot parse, e.g. Says it was resolved by adding "type=module" but this would typically go in the HTML, of which I have none. 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". Wtf is up with node-fetch? In Jest configuration, testPathIgnorePatterns, transformIgnorePatterns, Using .babel.config.js instead of .babelrc.js. I am working on a Next.js project using TypeScript and for testing I use Jest and React Testing Lib. @GunarGessner is there a particular reason why .babelrc doesnt work?