The global "fetch" module is incompatible with the 'original' global node fetch module.

[j-o-r]

Expected Behavior

Expecting fetch to be compatible with the original Node.js fetch API.

Actual Behavior

The node-fetch module (https://www.npmjs.com/package/node-fetch) overwrites the global fetch module and is incompatible, causing the following error in all underlying imported modules using fetch.

TypeError: res.body.getReader is not a function

Steps to Reproduce the Problem

import bfetch from 'node-fetch';

// error getReader
async function nodefetchExample() {
  const response = await bfetch('https://google.com');
  const reader = await response.body.getReader();
}

nodefetchExample().catch(error => console.error(error));

// no error in original fetch
async function fetchExample() {
  const response = await fetch('https://google.com');
  const reader = await response.body.getReader();
}

fetchExample().catch(error => console.error(error));

https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream/getReader

Solution:

Do not replace or overwrite the global fetch module with node-fetch if it is already present.
This will also supports the proposed AbortController #527

Specifications

• Version: 7.2.3
• Platform: Node v20.6.1