ESLint: 'cy' is not defined (Cypress)

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I've just started using Cypress with my React Typescript project. I've gotten some simple tests to run:

describe('settings page', () => {
  beforeEach(() => {
    cy.visit('http://localhost:3000')
  });
  it('starts in a waiting state, with no settings.', () => {
    cy.contains('Waiting for settings...')
  });
  it('shows settings once settings are received', () => {
    const state = cy.window().its('store').invoke('getState')
    console.log(state) // different question: how do I get this to be the state and not a $Chainer?
  });
});

It runs in Cypress just fine. But I get Typescript errors in Webstorm, saying that cy is not defined (a TS and ESlint error) and an error on describe saying all files must be modules when the --isolatedModules flag is provided.

I can make it a JS file instead of a TS file, then I still get cy is not defined.

I've tried import cy from 'cypress' but then I get ParseError: 'import' and 'export' may appear only with 'sourceType: module' which is a whole other can of worms (I'm taking baby steps in writing my tests and haven't had to import anything yet...)

/// <reference types="cypress" /> does not work.

Update (sort of)

I've followed instructions here and have made a little progress. To my already very full React webpack.config.dev.js I added the recommended code:

          { // TODO inserted for cypress https://stackoverflow.com/a/56693706/6826164
            rules: [
              {
                test: /\.tsx?$/,
                use: 'ts-loader',
                exclude: /node_modules/
              }
            ]
          },

to the end of the list of rules (just before the file loader).

When I do this as well as setting up the plugins/index file as indicated in the article, the cypress "home screen" runs but when I click to open my tests, it takes very many seconds and then shows lots of errors, starting with

integration\settings.spec.ts
This occurred while Cypress was compiling and bundling your test code. This is usually caused by:

A missing file or dependency
A syntax error in the file or one of its dependencies
Fix the error in your code and re-run your tests.

./cypress/integration/settings.spec.ts
Module build failed (from ./node_modules/ts-loader/index.js):
Error: TypeScript emitted no output for C:\Users\...\...\front_end\cypress\integration\settings.spec.ts.
 @ multi ./cypress/integration/settings.spec.ts main[0]

Followed by, actually, a lot of Typescript output such as this:

C:\Users\jtuzman\dev\...\...\src\__tests__\Errors.test.tsx
[tsl] ERROR in C:\Users\jtuzman\dev\...\...\src\__tests__\Errors.test.tsx(37,41)
      TS2339: Property 'toBeTruthy' does not exist on type 'Assertion'.

C:\Users\jtuzman\dev\...\...\src\__tests__\Errors.test.tsx
[tsl] ERROR in C:\Users\jtuzman\dev\...\...\src\__tests__\Errors.test.tsx(41,45)
      TS2339: Property 'toBeDefined' does not exist on type 'Assertion'.

Notice that these are now errors for code outside the test files (although perhaps that makes sense). Many of them are for files in which I'm using Jest rather than Cypress, and many errors, as you can see, seem to be related to it inferring an Assertion type on expect that is not Jest, such that it thinks the toEqual matcher is wrong.

All the while, in Webstorm ESLint is still complaining about all my cy and TypeScript is underlining all those Jest assertions mentioned in the output.

This is all with a ts test file. If I rename the file to js, it says the file has no tests.

Any help? I love Cypress but I'm having a hell of a time getting it to work fully!

I got that error after upgrading to cypress version 4+. I installed the eslint-plugin-cypress https://github.com/cypress-io/eslint-plugin-cypress and activated it in the extends configuration either in package.json or in separate config file:

"eslintConfig": {
  "extends": [
    "plugin:cypress/recommended"
  ]
},

eslint, Learn about our RFC process, Open RFC meetings & more.Join in the discussion ! � eslint. 7.5.0 • Public • Published 12 days ago. Readme � ExploreBETA � 36� ESLint is a static code analysis tool for identifying problematic patterns found in JavaScript code. It was created by Nicholas C. Zakas in 2013. Rules in ESLint are configurable, and customized rules can be defined and loaded. ESLint covers both code quality and coding style issues.

at the top of your file put

/// <reference types="cypress" />

or download the official types

source: official cypress intellisense docs

eslint/eslint: Find and fix problems in your JavaScript code., ESLint is a tool for identifying and reporting on patterns found in ECMAScript/ JavaScript code. In many ways, it is similar to JSLint and JSHint with a few� ESLint is a JavaScript linter that enables you to enforce a set of style, formatting, and coding standards for your codebase. It looks at your code, and tells you when you're not following the standard that you set in place. You may have also heard of TSLint, the TypeScript equivalent.

Try.. import cy from "cypress" this solved the problem for me.

typescript-eslint/typescript-eslint: Monorepo for all the , ESLint is an awesome linter for JavaScript code. Behind the scenes, it uses a parser to turn your source code into a data format called an Abstract Syntax Tree (� The extension uses the ESLint library installed in the opened workspace folder. If the folder doesn't provide one the extension looks for a global install version. If you haven't installed ESLint either locally or globally do so by running npm install eslint in the workspace folder for a local install or npm install -g eslint for a global install.

ESLint, ESLint is a static code analysis tool for identifying problematic patterns found in JavaScript code. It was created by Nicholas C. Zakas in 2013. Rules in ESLint� ESLint can both format your code and analyze it to make suggestions for improvement. It is also configurable, so you can customize how your code is evaluated. In this tutorial, you will set up ESLint on Visual Studio Code and implement a custom configuration to deal with log statements in debugging.

Just add these lines to your tsconfig.json file for e2e tests:

"compilerOptions": {
    "types": ["cypress"]
}

This adds support for cypress types.

ESLint: The Next-Generation JavaScript Linter — Smashing Magazine, Meet ESLint, a tool that allows you to automatically detect incorrect patterns in JavaScript. Legacy Problems. I had made a couple small� ESLint is a tool for identifying and reporting on patterns found in ECMAScript/JavaScript code. In many ways, it is similar to JSLint and JSHint with a few exceptions: ESLint uses Espree for JavaScript parsing. ESLint uses an AST to evaluate patterns in code.

Keep your code clean with ESLint, ESLint. ESLint is a linter for the JavaScript programming language, written in Node.js. It is hugely useful because JavaScript, being an interpreted� ESLintanalyzes your code to find issues based on pre-defined However, sometimes you need to break an ESLint rule. for ignoring rule violations in code: Using comments, which let you disable certain rulesfor a line or code block.

i have already tried to find eslint rules or options in the project but i could not find these. i am using angularjs with mvc5 template type of aspnet zero. How to disable eqeqeq in visual studio for

Comments
  • Did you get it solved? I am facing similar issue.
  • Thanks but that's actually not working at all. I also tried downloading @types/cypress and adding it to my tsconfig, and that doesn't help any of the problems.
  • Hi, welcome to stack-overflow . you can use this link for improve your answer stackoverflow.com/help/how-to-answer and stackoverflow.com/tour
  • You need to install the plugin. The reason it looks like the problem is fixed is because ESLint will error out and stop linting the directory so all the warnings disappear. It looks like you're using VSCode, so you can click the ESLint tab in the bottom right to verify this.