In NodeJS I get `ReferenceError: XMLHttpRequest is not defined` when using "rxjs/ajax"

[kasir-barati]

Describe the bug

import { ajax } from 'rxjs/ajax';

const observable$ = ajax.get('https://reqres.in/api/users/2');

observable$.subscribe({
  next(data) {
    console.log(data);
  },
  complete() {
    console.info("And we're done, we've fetched all data we could!");
  },
  error(err) {
    console.error(err);
  },
});

A simple TS snippet with this tsconfig.json:

{
  "compilerOptions": {
    "module": "NodeNext",
    "declaration": true,
    "strict": true,
    "removeComments": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "target": "ES2024",
    "sourceMap": true,
    "outDir": "./dist",
    "baseUrl": "./",
    "allowSyntheticDefaultImports": true,
    "incremental": false,
    "skipLibCheck": true
  },
  "exclude": ["node_modules", "dist"]
}

And this pacakge.json:

{
  "name": "rxjs",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "ts-node"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "rxjs": "^7.8.1",
    "ts-node": "^10.9.2"
  }
}

Expected behavior

Just work

Reproduction code

N/A.

Reproduction URL

No response

Version

7.8.1

Environment

Linux, Ubuntu

Additional context

No response

[kwonoj]

Rxjs does not provide or polyfills global for the environment does not have it. It's up to user's config to porvide necessary polyfill.

[kasir-barati]

Either please confirm if this is a bug (which I doubt), or add some sort of docs in your website please