syntaxerror: cannot use import statement outside a module jest syntaxerror: cannot use import statement outside a module jest

or to add an environment variable to the test script. This can be configured using transformIgnorePatterns. To learn more, see our tips on writing great answers. Node.js supports esm syntax only from v16, but jest doesn't support it yet. "Signpost" puzzle from Tatham's collection. So I changed the "import" to a "require" and this worked. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. Can the game be left in an invalid state if all state-based actions are replaced? It took me days to get Jest to sort-of work. "type": "module" How about saving the world? I solved the thing by actually creating any sort of babel configuration file in the first place! Please open a new issue for related bugs. Step 3: Execute your script. But, for runtime, you may execute node with the compiled js file! "SyntaxError: Cannot use import statement outside a module" error while testing React Native project with Jest and @testing-library/react-native? Can the game be left in an invalid state if all state-based actions are replaced? How can I mock an ES6 module import using Jest? Files including node modules must either end in .mjs or the nearest package.json file must contain "type": "module". Using jest@24.9.0 from react-scripts@3.3.0 importing crossfilter2@1.5.0. You can interpret individual files as CommonJS by using the .cjs extension. 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. I tried to implement jest for testing of a components library I'm currently building (Vite + Vue3 + Rollup) but I'm running in to some issues. How to create a virtual ISO file from /dev/sr0, Understanding the probability of measurement w.r.t. 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.. Could you please elaborate on why. Remember this is for nodejs example: like an expressJS server! Can you post the solution if this works please? To solve the error, make sure that your TypeScript files are compiled to The example configuration above should be located in the root directory of your project (where your package.json file is).. Like this one here: ES6 module Import giving "Uncaught SyntaxError: Unexpected identifier". Looking for job perks? I have attached my error output, jest.config.js and babel.rc file below. To learn more, see our tips on writing great answers. To make your import work and avoid other issues, like modules not working in Node.js, just note that: With ES6 modules you can not yet import directories. @xpt Hey. Reproducible repo: https://github.com/hutber/cannotusestatement. density matrix, English version of Russian proverb "The hedgehogs got pricked, cried, but continued to eat the cactus". @GunarGessner is there a particular reason why .babelrc doesnt work? All other files, such as .js will be interpreted as CommonJS, which is the default if type is not defined in package.json. aboutus.test.js. As far as I understand this, Jest does not support ES6 so node_modules may need to be transformed. Second, enable ESM in your package.json file: Third, update the test property in the package.json file: Following that, create the jest.config.js and add the following contents: Thanks for contributing an answer to Stack Overflow! Maybe even a diff before and after your update. Please, this setup causes the following error for me, Jest won't transform the module - SyntaxError: Cannot use import statement outside a module, babeljs.io/docs/en/configuration#whats-your-use-case, https://babeljs.io/docs/en/configuration#whats-your-use-case, Configuration Jest#transformignorepatterns-arraystring. I didn't need to introduce any babel configuration, 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. However, is main-file.js a module too? Well occasionally send you account related emails. @Cocuba answer is spot on and should be the accepted answer because it actually transpiles. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. In additioon to the answer, here is the official Jest, Jest unit test - SyntaxError: Cannot use import statement outside a module. Error: SyntaxError: Cannot use import statement outside a module, https://stackoverflow.com/questions/55794280/jest-fails-with-unexpected-token-on-import-statement, BUG-1: Jest Testing Failing on ES6 Imports, https://xperimentalhamid.com/how-do-i/fix-cannot-use-import-statement-outside-a-module/. I need help please ! But idk why and how I can solve this. Are there any canonical examples of the Prime Directive being broken that aren't shown on screen? Jest - SyntaxError: Cannot use import statement outside a module . console.warn Unexpected error: SyntaxError: Cannot use import statement outside a . Solved mine by adding "modules": "commonjs" inside .babelrc -> presets -> @babel/preset-env. ): This can also occur when you're trying to import a file that is importing a dependency that is simply not using the ES6 syntax. Are there any canonical examples of the Prime Directive being broken that aren't shown on screen? Instead of using the default "preset": "ts-jest", try use presets like "preset": "ts-jest/presets/js-with-ts". Hi , I am new to Vue Unit Testing and i keep getting the same Error after trying my first test.It seems to work for the first 2 import statements , but not for the epic-spinners one .I tried everything and looked up a lot over the forums and Github , but i couldnt find a solution. They do not run currently. Running yarn test: arn run v1.22.4 $ jest FA. Basically, jest runs on Node.js environment, so it uses modules following the. So, for example when you are using lodash, you want to use import cloneDeep from 'lodash-es/cloneDeep'; instead of import { cloneDeep } from 'lodash-es';. How a top-ranked engineering school reimagined CS curriculum (Ep. the full information is here; https://babeljs.io/docs/en/babel-node. Perhaps nodemon executes files as modules, so intrinsically error disappears, That works for me. Has depleted uranium been considered for radiation shielding in crewed spacecraft beyond LEO? .babelrc is local to your project so it won't be applied to node_modules in Jest. How can I mock an ES6 module import using Jest? Thought I was going crazy. Looking for job perks? Because it makes smaller size of the bundle. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. But Jest won't transform the module to plain javascript somehow. This happens e.g. Asking for help, clarification, or responding to other answers. if you want to run like that then you have to add babel. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. No jest/babel configs and it's not going to work! This turned out to be pretty specific to our codebase and having NODE_ENV set to production in our test environment. 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. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. You'll need to set allowJs to true in your tsconfig.json file. Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower? FAIL tests/time-range-input.spec.ts Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Says it was resolved by adding "type=module" but this would typically go in the HTML, of which I have none. Connect and share knowledge within a single location that is structured and easy to search. SyntaxError: Cannot use import statement outside a module (phpStorm/Js/Jest) . 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 : Please note this issue tracker is not a help forum. However, this does not work for me. The problem is some of the (node_) modules you're using need to be transpiled and some don't. Thanks. I am new to unit testing so any help will be very much appreciated!!! Reference: Maybe you want to have a look into this. Jest does not support ECMAScript Modules which is what hast-util-raw uses. SyntaxError: Cannot use import statement outside a module. Shocker. We enabled tests in a Heroku pipeline for one of our apps, and this error started popping up. Tikz: Numbering vertices of regular a-sided Polygon. Is there a way to have jest prefer the commonjs version main instead of module? Cannot use import statement outside a module in TypeScript. How to combine independent probability distributions? By default, if Jest sees a Babel config, it will use that to transform your . How a top-ranked engineering school reimagined CS curriculum (Ep. Can the game be left in an invalid state if all state-based actions are replaced? 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! or use babel! Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Thanks for contributing an answer to Stack Overflow! 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. In order to enable the preset you have to define it in your babel.config.json file, like this: Check for more details on Babel official site. some-other-file.js is quite large and you don't need the entire file. Connect and share knowledge within a single location that is structured and easy to search. The only solution, for server or client, is to change your server or browser to deliver a new Mime-type that trigger ES6 support of Module files, which have an .mjs extension. edit: omg, in case you actually use TS? To learn more, see our tips on writing great answers. I have tried most of the suggestions made here. In my case jest would stumle on .js files from one of the dependencies in node_modules with SyntaxError: Cannot use import statement outside a module.. As answers above have described, Jest doesn't support ES6 modules. them. My "index.js" is: SyntaxError: Cannot use import statement outside a module. Plot a one variable function with different values for parameters? I will update the original with dependencies, though. What is scrcpy OTG mode and how does it work? How to resolve "Cannot use import statement outside a module" from Jest when running tests? In newer version of jest, babel-jest is now automatically loaded by Jest and fully integrated. 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. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. I've trawled through a lot of docs but it just doesn't seem to run any longer. This means both .js and .mjs types are the same. However when I move to use jest with "test": "jest --config jest.config.js", I see the below error. so even if I add, thank you! I am having this issue with @react-native-firebase/app v6. add an additional pattern to the transform section, if you want TypeScript to process JS files, set, if you do not want TypeScript to process your. Not the answer you're looking for? The fix is to import from antd/lib/ instead. To learn more, see our tips on writing great answers. To sum it up, a module is a js file that can be separated by its functions so it can export particular functions opposed to the whole file. any docs that describe this? I read that node supports import now but so many tutorials show require for pure node stuff that it's likely better to use that syntax for node. This step is only required if you are using babel-jest to transform TypeScript files. Jest doesn't support ES6 module and hence throwing this error when you directly run the test with Jest. Let's suppose my old script was test.js. To learn more, see our tips on writing great answers. Did you already use type:"module" in package.json? The following change in each jest.config.js fixed it: I had this issue when I was running migration, and go ahead to run my sequelize migrate. 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. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This will let you use antd/es/ in your code but will replace it with antd/lib/ on your tests. project (where your package.json file is). What does 'They're at four. @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. Similar issue, but the module I'm having problems with has both es6 and cjs versions, and I'd rather use the cjs version rather than transpile the es6 one. This used to work fine, but after updating Jest the tests now cease to run. Can my creature spell be countered if I cast a split second spell after it? tar command with and without --absolute-names option. You can interpret individual files as CommonJS by using the .cjs extension. Connect and share knowledge within a single location that is structured and easy to search. What is scrcpy OTG mode and how does it work? 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." Why not upload images of code/errors when asking a question? rev2023.4.21.43403. 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. To fix this, just rename your old script test.js into test.mjs. What did you put in your jest.config.js to avoid the "Cannot use import statement outside a module" error? Find centralized, trusted content and collaborate around the technologies you use most. When should I use curly braces for ES6 import? Why did DOS-based Windows require HIMEM.SYS to boot? As a relative beginner to configuring jest, I had a hard time figuring out why this error was happening on my project. How a top-ranked engineering school reimagined CS curriculum (Ep. So, we need transform the code to a supported module type. then config your babel file in your repo! 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 fixes I've seen all seem to be forcing babel to transpile, which seems like a bad fix when an already transpiled version is available. Read more > Issue with Jest + NextJS - SyntaxError: Cannot use import . Why does Acts not mention the deaths of Peter and Paul? If you want to treat other file extensions (such as ts) as ESM, please use the extensionsToTreatAsEsm option. Making statements based on opinion; back them up with references or personal experience. Wtf is up with node-fetch? By accident I found a hack to let pre-processor process the whole node_modules what is usually forbidden: By default "node_modules" folder is ignored by transformers. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Jest encountered an unexpected token. node target.ts. Would the "Cannot use import statement outside a module" rule apply to main-file.js (since it is not a module)? 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. __tests__ directory or files with .test or .spec suffix, e.g. Hope this helps anyone, this took me a while to figure out. As far as I understand this, Jest does not support ES6 so node_modules may need to be transformed. I solved my problem, mocking the file Edit: For the record, I'm using TypeScript. Unexpected token '<' and SyntaxError: Cannot use import statement outside a module. example.test.ts or example.spec.ts. ', referring to the nuclear power plant in Ignalina, mean? So I understand some-other-file.js is module, which can export particular functions opposed to the whole file. use jest.config.js or package.json for that instead? Connect and share knowledge within a single location that is structured and easy to search. it's not plain JavaScript. Just that, say I'm writing an app, not a module, does. ex: jest.mock('rehype-raw/index.js', () => jest.fn()); I tried a lot of answers here, but nothing worked for me. From the error message which provides the link that suggests this resolution: I wanted to add how I easily caused this issue for myself.. If anyone is running into this issue with TypeScript, the key to solving it for me was changing. Plot a one variable function with different values for parameters? It causes the following error: Test suite failed to run Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e.g. The way using the standard executable (runner): The way using the nodemon executable (runner): Do not forget to install nodemon with npm install nodemon ;P. Note: this works amazing for development. I found this answer the most clear explanation to OP. 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. What does the power set mean in the construction of Von Neumann universe? I had the same issue. Currently, Node.js v12.14.1, "@babel/node": "^7.8.4", I use babel-node and nodemon to execute (Node.js is fine as well..), Of course, with babel-node, you also normally need and edit another file, such as the. Checks and balances in a 3 branch market economy. Q&A for work. Additional context. Specifically testing a component that imports from @sapper/app. After reading carefully about presets, I realized, that it leaves them 'as-is' with preset: 'ts-jest'. The Node documentation has a ton more information, also about interop between CommonJS and ES modules.". Connect and share knowledge within a single location that is structured and easy to search. What does "up to" mean in "is first up to launch"? 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. Just setup babel in your node app it will work and It worked for me. it's not plain JavaScript. I had this error in my NX workspace after upgrading manually. If you get any leads, I'll check them out against my original code. Making statements based on opinion; back them up with references or personal experience. We could use babel-jest or ts-jest. When you are using Typescript with ECMAScript. Next has already out-of-the-box support for Jest, I'd suggest you follow the steps provided in the docs. If you look closely at the error, you'll typically find the name of the module causing it. 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 just replaced all the "imports" with "requires" and all is well now. Not the answer you're looking for? I think that's the safest approach; even if you think all TypeScript you'll ever encounter uses import/export, I wouldn't be surprised if there are some folks out there who have been mixing import and require statements occasionally, since presumably they currently work. Delete your babel.rc. Thanks for contributing an answer to Stack Overflow! What are the advantages of running a power tool on 240 V vs 120 V? !rehype-raw)/"] should allow transformation of the rehype-raw but no other module. They should go to devDependencies instead. However if you checkout the above repo, which was imported into this sandbox it will not pass locally. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. to your account. In your package.json file make the following changes: Create a babel.config.json config in your project root and enable some presets. 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. Does that make sense? https://docs.netlify.com/functions/build-with-javascript/#automated-dependency-bundling. This happens e.g. Most of what I've found for solutions don't seem to apply to straight Node. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. It's 2022 and this should've worked in 2018 without any config. Yes! It's not them. Issue with Jest + NextJS - SyntaxError: Cannot use import statement outside a module . I pasted their instructions here, however, you should take a look at the document itself. Mozilla has some nice documentation about import. How do I resolve "Cannot find module" error using Node.js? project. I am working on a Next.js project using TypeScript and for testing I use Jest and React Testing Lib. I don't want to hate on Jest, I actually think it's a wonderful and intuitive testing tool. Where is exactly does this configuration reside? *I'm sure the root of my problem is that I'm not even sure what's complaining about the issue. However, there are some caveats to using TypeScript with Babel. I was able to switch to axios without a problem. To start, you can use the env preset, which enables transforms for ES2015+. Code snippets. Asking for help, clarification, or responding to other answers. Posted a working configuration here https://stackoverflow.com/a/63118113/6456392. I'm sorry to not put direct code on this post, it would make things unclear. Effect of a "bad grade" in grad school applications. "require" is not defined with the ES6 module, so you can define it this way: Now 'require' can be used in the usual way. Asking for help, clarification, or responding to other answers. do you have a example of a module? For those who were as confused as I was when reading the answers, in your package.json file, add I solved the fucking thing by migrating the .babelrc file to babel.config.js! I'm not sure if you should keep your jest config inside babel config? I didn't need a transform field, since the preset is already on it. I have just started learning jest testing and created a sample application to get familiar with jest testing.