TypeError: signal.throwIfAborted is not a function

[darrinmn9]

TypeError: signal.throwIfAborted is not a function

[sholladay]

I would recommend just running your tests in an actual browser with something like Playwright, rather than trying to emulate one with something like JSDOM.

JSDOM was designed to facilitate simple DOM based unit tests, nothing more. And it made sense at the time because browser automation tools barely existed and were cumbersome. But that's not the case anymore.

Check out how Ky's own tests are implemented. We do run many tests in Node, because they don't necessarily need a DOM or web API polyfills, especially in recent versions of Node. But for anything complicated, or where the test was really critical, I would put it in our browser tests. The boilerplate and performance overhead is minimal.

[sindresorhus]

Sounds like you're running it in an older Node.js version than you think you are. throwIfAborted is definitely available on Node.js 18.

[darrinmn9]

hmm 🤔 , in the jest output right after this error stack trace it says Node.js v18.19.0 (jest version 29.7.0). This also happens in both my local environment and CI (where i am confident only 1 version of node.js is ever installed). Maybe i can try different jest versions and see if maybe its an issue/regression related to my specific jest testing environment.

[darrinmn9]

ahhh silly me, I should have suspected the issue was with the jsdom environment. (jsdom doesnt currently support the global Fetch api).

Reference to issue and suggested workarounds for jsdom fetch support for others who may come across this:
jsdom/jsdom#1724

[marc-at-brightnight]

ahhh silly me, I should have suspected the issue was with the jsdom environment. (jsdom doesnt currently support the global Fetch api).

Reference to issue and suggested workarounds for jsdom fetch support for others who may come across this: jsdom/jsdom#1724

anyone still have an issue even after implementing this? I added the AbortController as well, as suggested by @darrinmn9 but no luck. I still get the error when running tests.

This is blocking me from upgrading my ky to v1, any help is appreciated.

Using node 18.12.1. Below is my jest.config.ts

import type { Config } from 'jest';

const config: Config = {
  testEnvironment: './FixJSDOMEnvironment.ts',
};

export default config;

[darrinmn9]

@marc-at-brightnight what is the exact error + stack trace you are getting, and what does ur FixJSDOMEnvironment.ts file look like?

[marc-at-brightnight]

@marc-at-brightnight what is the exact error + stack trace you are getting, and what does ur FixJSDOMEnvironment.ts file look like?

----stack trace-----
/Users/mnhmbp/PycharmProjects/my-app/node_modules/ky/distribution/utils/delay.js:13
      signal.throwIfAborted();

TypeError: signal.throwIfAborted is not a function
    at throwIfAborted (/Users/mnhmbp/PycharmProjects/my-app/node_modules/ky/source/utils/delay.ts:15:11)
    at new Promise (<anonymous>)
    at delay (/Users/mnhmbp/PycharmProjects/my-app/node_modules/ky/source/utils/delay.ts:13:9)
    at Ky._retry (/Users/mnhmbp/PycharmProjects/my-app/node_modules/ky/source/core/Ky.ts:259:16)
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at Promise.result.<computed> [as json] (/Users/mnhmbp/PycharmProjects/my-app/node_modules/ky/source/core/Ky.ts:86:27)

// FixJSDOMEnvironment.ts

import JSDOMEnvironment from 'jest-environment-jsdom';

// https://github.com/facebook/jest/blob/v29.4.3/website/versioned_docs/version-29.4/Configuration.md#testenvironment-string
export default class FixJSDOMEnvironment extends JSDOMEnvironment {
  constructor(...args: ConstructorParameters<typeof JSDOMEnvironment>) {
    super(...args);

    // FIXME https://github.com/jsdom/jsdom/issues/1724
    this.global.fetch = fetch;
    this.global.Headers = Headers;
    this.global.Request = Request;
    this.global.Response = Response;
    this.global.AbortController = AbortController;
  }
}

// package.json

"dependencies: {
  "ky": "^1.1.3",
  "jest-environment-jsdom": "^29.7.0"
  ...
}

Appreciate you taking a look!

[darrinmn9]

hmm... not sure, looks just like mine. (additionally i have this.global.FormData = FormData;, but that doesnt seem like ur issue here)

[darrinmn9]

totally agree! I am just trying to upgrade a large, existing jest test suite. But yes the longterm goal is to get off JSDOM... because as you've mentioned we have better solutions in 2024.