Hey, i am trying to compile Cypress project, with spec files written in TypeScript, inside Docker (i use officla image

included/9.1.1

from https://github.com/cypress-io/cypress-docker-images/tree/master/included/9.1.1) and i receive error: > error TS2688: Cannot find type definition file for 'cypress'. I have installed TypeScript with

npm install -g typescript

. The command i use to compile project is:

sh
tsc --project cypress/tsconfig.cypress.json

tsconfig.cypress.json

file:

json
{
    "compilerOptions": {
      "target": "es2020",
      "lib": ["es5", "dom"],
      "types": ["cypress"],
      "allowJs": true,
    },
    "include": ["./integration/*.spec.ts"]
  }

The mere Cypress has worked until i have been trying to add TypeScript. From what i saw there are Cypress types inside

/usr/local/lib/node_modules/cypress/types

folder and i even tried to put it inside

typeRoots

prop, but then i receive errors of lacking definition files for

npm

and

yarn

.

I think i fixed the issue. I investigated Cypress example repo for TypeScript integration (https://github.com/cypress-io/cypress-and-jest-typescript-example) and realized that they also install types for

chai

and

mocha

and that the Cypress types are really included inside

/usr/local/lib/node_modules/cypress/types

folder (mind

"/types"

instead of

"/@types"

- don't know why they named it without

"@"

though), so i don't have to install Cypress package separately, but just point to already existing types. I also had to add

"ES2015"

lib types and modify

"include"

to take all .ts files inside Cypress (nested) folders - except the

/src

, which is provided by Docker volume not to mess with app's source code - instead of just including

./integration/*.spec.ts

files. I now just install these:

sh
npm install -g typescript
npm install @types/mocha @types/chai

And i have such `tsconfig.cypress.json`:

json
{
    "compilerOptions": {
      "target": "es2020",
      "module": "commonjs",
      "lib": ["es5", "ES2015", "dom"],
      "typeRoots": [
        // official Cypress Docker container keeps types there
        "/usr/local/lib/node_modules/cypress/types",
      ],
      "types": ["cypress"],
      "allowJs": true,
      "resolveJsonModule": true
    },
    "include": ["./**/*.ts"],
    "exclude": ["./fixtures/src"]
}