[REGRESSION]: Playwright 1.28 unable to load the @js-temporal/polyfill library

[thewilkybarkid]

Context:

• GOOD Playwright Version: 1.27.1
• BAD Playwright Version: 1.28.0, 1.28.1
• Operating System: Mac, and Docker
• Extra: Bump @playwright/test from 1.27.1 to 1.28.0 PREreview/prereview.org#461 Bump @playwright/test from 1.27.1 to 1.28.1 PREreview/prereview.org#477

Code Snippet

import { Temporal } from '@js-temporal/polyfill'
[...]

import PlainDate = Temporal.PlainDate

(source)

Describe the bug

Playwright fails

Running 0 tests using 0 workers

ReferenceError: Temporal is not defined

   at ../src/infrastructure.ts:50

  48 | import { NewPrereview } from './write-review'
  49 |
> 50 | import PlainDate = Temporal.PlainDate

In previous versions it successfully ran. This code is in my server with Playwright runs; TypeScript is able to compile the code and Node run it successfully.

[mxschmitt]

Bisect: 11eb719...af38449

bad 1.28.0-alpha-oct-20-2022
good 1.28.0-alpha-oct-19-2022

Most likely caused by 9fe72a1.

[dgozman]

This will be fixed by #19026 in v1.29.

Babel issue: babel/babel#14912, fixed in babel/babel#14913, so bumping @babel/plugin-transform-typescript to 7.20.2 helped.