[Question] Why is bigint literal rejected but seems well supported in caniuse?

I am testing code that uses bigint literals like const a = 22n. When testing using playwright, I get this error:

[WebServer] ✘ [ERROR] Big integer literals are not available in the configured target environment ("chrome87", "edge88", "es2020", "firefox78", "safari13" + 2 overrides)

Support for bigInt literals seems wide though (chrome87,edge88, es2020, firefox78), excepting Safari13.

Why is reporting error in all of them ?

Also just replacing by BigInt(a) passes all, but I would prefer the n literal.

[dgozman]

@santimirandarp What is your @playwright/test version? I also see viteConfig that is not supported in Playwright, could it be the problem?

I pasted your config, commented out viteConfig and ran the following test:

import { test, expect } from '@playwright/test';

test(`Run`, async () => {
  const flag = 1000n;
  const slice = !!(flag >> 7n);
  expect(slice).toBe(true);
});

Everything passed for me:

Running 3 tests using 3 workers

  ✓  1 [chromium] › a.spec.ts:3:1 › Run (6ms)
  ✓  2 [webkit] › a.spec.ts:3:1 › Run (6ms)
  ✓  3 [firefox] › a.spec.ts:3:1 › Run (6ms)


  3 passed (296ms)

Could you please share a full repro so that we can debug locally?

[mxschmitt]

Closing as part of the triage process since it seemed stale or did not get enough upvotes in the past. Please create a new issue with a detailed reproducible or feature request if you still face issues.