"Couldn't find tsconfig.json" warning when no TypeScript in project

[MikeMcC399]

Current behavior

If the npm module browser-sync is installed, a warning message is displayed when Cypress is run:

"Couldn't find tsconfig.json. tsconfig-paths will be skipped"

There are however no TypeScript files involved in the test.

Installing browser-sync 2.27.11 has caused typescript 4.9.4 to be installed.

ts-warn-test@1.0.0
└─┬ browser-sync@2.27.11
  └─┬ browser-sync-client@2.27.11
    └── typescript@4.9.4

On GitHub ubuntu-22.04 runner

Without DEBUG enabled, the log file shows:

Opening Cypress...
...
Couldn't find tsconfig.json. tsconfig-paths will be skipped

With DEBUG enabled, the log file shows:

cypress:lifecycle:ProjectConfigIpc found typescript in /home/runner/work/ts-warn-test/ts-warn-test/tests/cy-with-browser-sync
cypress:lifecycle:ProjectConfigIpc using cjs with --require /home/runner/.cache/Cypress/12.2.0/Cypress/resources/app/node_modules/@packages/server/lib/plugins/child/register_ts_node.js
cypress:lifecycle:ProjectConfigIpc trigger the load of the file
cypress:server:register-ts-node executing register_ts_node with args { _: [ '/opt/hostedtoolcache/node/18.12.1/x64/bin/node', '/home/runner/.cache/Cypress/12.2.0/Cypress/resources/app/node_modules/@packages/server/lib/plugins/child/require_async_child.js' ], projectRoot: '/home/runner/work/ts-warn-test/ts-warn-test/tests/cy-with-browser-sync', file: '/home/runner/work/ts-warn-test/ts-warn-test/tests/cy-with-browser-sync/cypress.config.js' }
cypress:server:register-ts-node registering ts-node for projectRoot: /home/runner/work/ts-warn-test/ts-warn-test/tests/cy-with-browser-sync and file: /home/runner/work/ts-warn-test/ts-warn-test/tests/cy-with-browser-sync/cypress.config.js
cypress:server:ts-node projectRoot path: /home/runner/work/ts-warn-test/ts-warn-test/tests/cy-with-browser-sync
cypress:server:ts-node registeredFile: /home/runner/work/ts-warn-test/ts-warn-test/tests/cy-with-browser-sync/cypress.config.js
cypress:server:plugins resolving typescript with projectRoot '/home/runner/work/ts-warn-test/ts-warn-test/tests/cy-with-browser-sync'
cypress:server:plugins resolved typescript /home/runner/work/ts-warn-test/ts-warn-test/tests/cy-with-browser-sync/node_modules/typescript/lib/typescript.js
cypress:server:ts-node typescript path: /home/runner/work/ts-warn-test/ts-warn-test/tests/cy-with-browser-sync/node_modules/typescript/lib/typescript.js
cypress:server:ts-node registering project TS with options { compiler: '/home/runner/work/ts-warn-test/ts-warn-test/tests/cy-with-browser-sync/node_modules/typescript/lib/typescript.js', compilerOptions: { module: 'commonjs', preserveValueImports: false }, dir: '/home/runner/work/ts-warn-test/ts-warn-test/tests/cy-with-browser-sync', transpileOnly: true }
Couldn't find tsconfig.json. tsconfig-paths will be skipped

Run locally Ubuntu 22.04

On Ubuntu 22.04 run locally

cd tests/cy-with-browser-sync
npx cypress run

no warning is output, unless

export DEBUG=cypress:*

is set, in which case the warning
"Couldn't find tsconfig.json. tsconfig-paths will be skipped"
is found in the debug logs.

Run locally Windows 11

On Windows 11 run locally

cd tests/cy-with-browser-sync
npx cypress run

the warning
"Couldn't find tsconfig.json. tsconfig-paths will be skipped"
is output.

Desired behavior

Installing browser-sync without any TypeScript files (*.ts, *.tsx) should not cause a warning message to appear when Cypress is run.

Test code to reproduce

See repository https://github.com/MikeMcC399/ts-warn-test (Edit: now archived.)

Workflows:

• https://github.com/MikeMcC399/ts-warn-test/blob/main/.github/workflows/cypress-test.yml (no DEBUG)
• https://github.com/MikeMcC399/ts-warn-test/blob/main/.github/workflows/cypress-test-debug.yml (with DEBUG:cypress:*)

Or clone the repository and run

cd tests/cy-with-browser-sync
npx cypress run

Cypress Version

12.2.0
(not resolved in Cypress 12.8.1)

Node version

16.13.0 for GitHub runner using cypress-io/github-action
(now 16.16.0)

Operating System

ubuntu-22.04

Debug Logs

• Action log (https://github.com/MikeMcC399/ts-warn-test/actions/runs/3828987111/jobs/6515177387)
• https://github.com/MikeMcC399/ts-warn-test/blob/main/logs/3_Cypress%20run.txt

especially

https://github.com/MikeMcC399/ts-warn-test/blob/59c204bdd854cc69410ef0af683cac91a5d0fbf6/logs/3_Cypress%20run.txt#L116-L124

Other

• This issue is related to the open issue Error message printed to the console: Couldn't find tsconfig.json. tsconfig-paths will be skipped #22273.
• and to Do not show tsconfig.json warning in terminal for TS projects without tsconfig.json #21805

It is not the same issue though, because in this issue a project is described which is not using TypeScript at all.

[MikeMcC399]

There was a suggestion in #22273 (comment) from @segevfiner that the issue might be resolved by upgrading

cypress/packages/server/package.json

Line 188 in 3925ae0

"tsconfig-paths": "3.10.1",

to use v4.

[astone123]

Thanks @MikeMcC399, looks like we just need to upgrade tsconfig-paths to v4. Routing this to the e2e team

[MikeMcC399]

I updated the repo https://github.com/MikeMcC399/ts-warn-test, which demonstrates the issue, to Cypress 12.5.1.

The warning message
"Couldn't find tsconfig.json. tsconfig-paths will be skipped"
is still shown.

I cannot yet see any qualification of this issue from the https://github.com/cypress-io/cypress/labels/routed-to-e2e team.

Edit: I also confirmed that it is still reproducible on Cypress 12.8.1.

[MikeMcC399]

@astone123

looks like we just need to upgrade tsconfig-paths to v4. Routing this to the e2e team

Thanks very much for your assessment! We didn't hear anything back from the e2e team so far. I guess they are overloaded!?

[MikeMcC399]

This issue is no longer reproducible with browser-sync 2.29.1 due to the removal of "typescript": "^4.6.2" from dependencies in browser-sync (see comments in BrowserSync/browser-sync#2029), so I will close the issue.

The other related open issues continue to warrant investigation and resolution:

• Error message printed to the console: Couldn't find tsconfig.json. tsconfig-paths will be skipped #22273
• Do not show tsconfig.json warning in terminal for TS projects without tsconfig.json #21805