[BUG] Extension required when importing other files with type="module"

Context:

## System:
 - OS: macOS 12.2.1
 - Memory: 802.27 MB / 32.00 GB
## Binaries:
 - Node: 16.13.1 - ~/.volta/tools/image/node/16.13.1/bin/node
 - Yarn: 1.22.17 - ~/.volta/bin/yarn
 - npm: 8.3.0 - ~/.volta/tools/image/npm/8.3.0/bin/npm
## Languages:
 - Bash: 3.2.57 - /bin/bash

Describe the bug

I am using type=“module” in my package.json, and running with PW_EXPERIMENTAL_TS_ESM=1. I found that when I attempt to import another of my files from my global setup file, I need to specify the full filename with extension, which I think is a node esm requirement, but then typescript complains with An import path cannot end with a '.ts' extension. Consider importing './generateTOTP' instead.. If I don’t include the extension, playwright will not start and I get an error of:

Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/xxx/e2e/config/generateTOTP' imported from /xxx/e2e/config/global-setup.ts

[frederikhors]

It works! THANKS!

[IanVS]

Name the file with .ts, but try importing it with a .js extension.