Uncaught SyntaxError: missing name after . operator

[MartyWind]

Hi,

I get this error in my Firefox JS console:
Uncaught SyntaxError: missing name after . operator

When I click the link behind this message, it jumps to this code:

// node_modules/graphql/jsutils/instanceOf.mjs
var instanceOf = globalThis.process && globalThis."development" === "production" ? function instanceOf2(value, constructor) {

I assume it's this, but I'm new to JS, so I don't know where this gets translated from ts to mjs.

graphql-js/src/jsutils/instanceOf.ts

Line 12 in 3610786

globalThis.process?.env.NODE_ENV === 'production'

The process?.env.NODE_ENV seems to be replaced with its literal value, what results in an incorrect syntax.

Am I using it wrong? How can I prevent that?

Greetings

[MartyWind]

I dug deeper into the exiting issues - and not just looked for my error - and found that this is a duplicate of #3928