Cypress cannot start with importHelpers and allowJS TypeScript options

[agg23]

Current behavior:

Attempting to launch Cypress with this tsconfig results in the following exception:

{
  "compilerOptions": {
    "importHelpers": true,
    "allowJs": true
  }
}

Error: Cannot find module 'tslib'
Require stack:
- C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\reporter\lib\resolve-dist.js
- C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\controllers\reporter.js
- C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\routes.js
- C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\server.js
- C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\project.js
- C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\gui\events.js
- C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\modes\interactive.js
- C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\modes\index.js
- C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\cypress.js
- C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\index.js
- C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\index.js
- 
    at Module._resolveFilename (internal/modules/cjs/loader.js:798:15)
    at Function../lib/common/reset-search-paths.ts.Module._resolveFilename (electron/js2c/browser_init.js:7630:16)
    at Module._load (internal/modules/cjs/loader.js:691:27)
    at Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\override_require.js:18:25)
    at Module.require (internal/modules/cjs/loader.js:853:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\reporter\lib\resolve-dist.js:1:15)
    at Module._compile (internal/modules/cjs/loader.js:968:30)
    at Module.m._compile (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\ts-node\src\index.ts:536:23)
    at Module._extensions..js (internal/modules/cjs/loader.js:986:10)
    at Object.require.extensions.<computed> [as .js] (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\ts-node\src\index.ts:539:12)
    at Module.load (internal/modules/cjs/loader.js:816:32)
    at Module._load (internal/modules/cjs/loader.js:728:14)
    at Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\override_require.js:18:25)
    at Module.require (internal/modules/cjs/loader.js:853:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\controllers\reporter.js:8:14)
    at Object.<anonymous> (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\controllers\reporter.js:18:4)
    at Module._compile (internal/modules/cjs/loader.js:968:30)
    at Module.m._compile (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\ts-node\src\index.ts:536:23)
    at Module._extensions..js (internal/modules/cjs/loader.js:986:10)
    at Object.require.extensions.<computed> [as .js] (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\ts-node\src\index.ts:539:12)
    at Module.load (internal/modules/cjs/loader.js:816:32)
    at Module._load (internal/modules/cjs/loader.js:728:14)
    at Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\override_require.js:18:25)
    at Module.require (internal/modules/cjs/loader.js:853:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\routes.js:9:18)
    at Module._compile (internal/modules/cjs/loader.js:968:30)
    at Module.m._compile (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\ts-node\src\index.ts:536:23)
    at Module._extensions..js (internal/modules/cjs/loader.js:986:10)
    at Object.require.extensions.<computed> [as .js] (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\ts-node\src\index.ts:539:12)
    at Module.load (internal/modules/cjs/loader.js:816:32)
    at Module._load (internal/modules/cjs/loader.js:728:14)
    at Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\override_require.js:18:25)
    at Module.require (internal/modules/cjs/loader.js:853:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Server.createRoutes (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\server.js:159:14)
    at C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\server.js:205:17
    at tryCatcher (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\bluebird\js\release\util.js:16:23)
    at Function.Promise.attempt.Promise.try (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\bluebird\js\release\method.js:39:29)
    at Server.open (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\server.js:180:28)
    at C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\lib\project.js:135:26
    at tryCatcher (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\bluebird\js\release\util.js:16:23)
    at Promise._settlePromiseFromHandler (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\bluebird\js\release\promise.js:547:31)
    at Promise._settlePromise (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\bluebird\js\release\promise.js:604:18)
    at Promise._settlePromise0 (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\bluebird\js\release\promise.js:649:10)
    at Promise._settlePromises (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\bluebird\js\release\promise.js:729:18)
    at _drainQueueStep (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\bluebird\js\release\async.js:93:12)
    at _drainQueue (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\bluebird\js\release\async.js:86:9)
    at Async._drainQueues (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\bluebird\js\release\async.js:102:5)
    at Immediate.Async.drainQueues [as _onImmediate] (C:\Users\adgastin\AppData\Local\Cypress\Cache\4.7.0\Cypress\resources\app\packages\server\node_modules\bluebird\js\release\async.js:15:14)
    at processImmediate (internal/timers.js:439:21)

Removing either flag fixes the error. tslib is forcibly installed to guarantee there is no issue resolving it.

This appears to occur regardless of what is in the Cypress tsconfig, so as long as the parent project contains this config, Cypress cannot start.

Versions

Cypress 4.6.0 - 4.7.0

[garvik]

I'm getting the same error using any version that's >= 4.4.0. Works fine in 4.3.0.

[gustawx]

I'm having the same issue with version 4.7.0 and any typescript version higher than 3.5.1 - at least that's the latest I found that everything is fine.

@agg23 try with this ts version

[lonewarrior556]

Same here.. the error message for 4.4.0 is a bit different then 4.7.0

Cannot use import statement outside a module
/home/user/.cache/Cypress/4.4.1/Cypress/resources/app/packages/reporter/lib/resolve-dist.js:1
import { __spreadArrays } from "tslib";
^^^^^^

[jennifer-shehane]

I'm not able to reproduce this error with the information provided. Please provide a full example of this failing and the steps you took to see the error (cypress run vs cypress open, etc) - including any plugin/support/cypress.json files and spec files with tests.

cypress/integration/spec.js (also tried spec.ts)

it('test', () => {
 expect(true).to.be.true
})

tsconfig.json in the root of my project.

{
  "compilerOptions": {
    "importHelpers": true,
    "allowJs": true
  }
}

[lonewarrior556]

@jennifer-shehane
You didn't npm install your root. It works if there is no root/node_modules/

[boxmein]

I can reproduce the issue in here:

https://github.com/boxmein/cypress-7503

[jennifer-shehane]

@boxmein Thanks! This repo does reproduce the issue as described.

Repro

No cypress files/folders required.

package.json - only happens in typescript versions 3.6.3+

{
  "devDependencies": {
    "cypress": "4.7.0",
    "typescript": "3.9.3"
  }
}

tsconfig.json

{
  "compilerOptions": {
    "importHelpers": true,
    "allowJs": true
  }
}

4.3.0

4.4.0

Stack trace:

Error: Cannot find module 'tslib'
Require stack:
- /Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/reporter/lib/resolve-dist.js
- /Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/controllers/reporter.js
- /Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/routes.js
- /Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/server.js
- /Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/project.js
- /Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/gui/events.js
- /Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/modes/interactive.js
- /Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/modes/index.js
- /Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/cypress.js
- /Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/index.js
- /Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/index.js
- 
    at Module._resolveFilename (internal/modules/cjs/loader.js:798:15)
    at Function../lib/common/reset-search-paths.ts.Module._resolveFilename (electron/js2c/browser_init.js:7630:16)
    at Module._load (internal/modules/cjs/loader.js:691:27)
    at Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/override_require.js:18:25)
    at Module.require (internal/modules/cjs/loader.js:853:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/reporter/lib/resolve-dist.js:2:15)
    at Module._compile (internal/modules/cjs/loader.js:968:30)
    at Module.m._compile (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/ts-node/src/index.ts:536:23)
    at Module._extensions..js (internal/modules/cjs/loader.js:986:10)
    at Object.require.extensions.<computed> [as .js] (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/ts-node/src/index.ts:539:12)
    at Module.load (internal/modules/cjs/loader.js:816:32)
    at Module._load (internal/modules/cjs/loader.js:728:14)
    at Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/override_require.js:18:25)
    at Module.require (internal/modules/cjs/loader.js:853:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/controllers/reporter.js:8:14)
    at Object.<anonymous> (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/controllers/reporter.js:18:4)
    at Module._compile (internal/modules/cjs/loader.js:968:30)
    at Module.m._compile (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/ts-node/src/index.ts:536:23)
    at Module._extensions..js (internal/modules/cjs/loader.js:986:10)
    at Object.require.extensions.<computed> [as .js] (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/ts-node/src/index.ts:539:12)
    at Module.load (internal/modules/cjs/loader.js:816:32)
    at Module._load (internal/modules/cjs/loader.js:728:14)
    at Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/override_require.js:18:25)
    at Module.require (internal/modules/cjs/loader.js:853:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/routes.js:9:18)
    at Module._compile (internal/modules/cjs/loader.js:968:30)
    at Module.m._compile (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/ts-node/src/index.ts:536:23)
    at Module._extensions..js (internal/modules/cjs/loader.js:986:10)
    at Object.require.extensions.<computed> [as .js] (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/ts-node/src/index.ts:539:12)
    at Module.load (internal/modules/cjs/loader.js:816:32)
    at Module._load (internal/modules/cjs/loader.js:728:14)
    at Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/override_require.js:18:25)
    at Module.require (internal/modules/cjs/loader.js:853:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Server.createRoutes (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/server.js:159:14)
    at /Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/server.js:205:17
    at tryCatcher (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/util.js:16:23)
    at Function.Promise.attempt.Promise.try (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/method.js:39:29)
    at Server.open (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/server.js:180:28)
    at /Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/lib/project.js:135:26
    at tryCatcher (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/promise.js:547:31)
    at Promise._settlePromise (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/promise.js:604:18)
    at Promise._settlePromise0 (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/promise.js:649:10)
    at Promise._settlePromises (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/promise.js:729:18)
    at _drainQueueStep (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/async.js:93:12)
    at _drainQueue (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/async.js:86:9)
    at Async._drainQueues (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/async.js:102:5)
    at Immediate.Async.drainQueues [as _onImmediate] (/Users/jennifer/Library/Caches/Cypress/4.7.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/async.js:15:14)
    at processImmediate (internal/timers.js:439:21)

[boxmein]

@jennifer-shehane Thank you for the thorough testing & bisection!

[merry75]

same here ! any progres ?