Jest has an outdated jsdom config because it uses outdated jsdom.
I applied the sollution here and it works as long as I add the ts file in the jest config as testEnvironment but won't if I want to use it for a single test since
/** * @jest-environment ./src/test/my-custom-environment */Isn't doing anything, tried different paths and different files (mjs, cjs, js) but the whole thing is just ignored, even a non existing file won't produce an error.
The solution:
// FixJSDOMEnvironment.tsimport JSDOMEnvironment from 'jest-environment-jsdom';export default class FixJSDOMEnvironment extends JSDOMEnvironment { constructor(...args: ConstructorParameters<typeof JSDOMEnvironment>) { super(...args); this.global.fetch = fetch; this.global.Headers = Headers; this.global.Request = Request; this.global.Response = Response; }}// jest.config.jsconst config = { testEnvironment: './FixJSDOMEnvironment.ts', ...}