node-fetch-native

node-fetch-native

A redistribution of node-fetch v3 (+ more!) for better backward and forward compatibility.

Why this package?

• We can no longer require('node-fetch') with the latest version. This stopped popular libraries from upgrading and dependency conflicts between node-fetch@2 and node-fetch@3.
• With upcoming versions of Node.js, native fetch is being supported. We are prepared for native fetch support using this package yet keep supporting older Node versions.
• With the introduction of native fetch to Node.js via undici there is no easy way to support http proxies!

Features:

✅ Prefer to native globals when available (See Node.js experimental fetch).

✅ Compact build and less install size with zero dependencies ^vs

✅ Support both CommonJS (require) and ESM (import) usage

✅ Use native version if imported without node condition using conditional exports with zero bundle overhead

✅ Polyfill support for Node.js

✅ Compact and simple proxy supporting both Node.js versions without native fetch using HTTP Agent and versions with native fetch using Undici Proxy Agent

Usage

Install node-fetch-native dependency:

# npm
npm i node-fetch-native

# yarn
yarn add node-fetch-native

# pnpm
pnpm i node-fetch-native

You can now either import or require the dependency:

// ESM
import fetch from "node-fetch-native";

// CommonJS
const fetch = require("node-fetch-native");

More named exports:

// ESM
import {
  fetch,
  Blob,
  FormData,
  Headers,
  Request,
  Response,
  AbortController,
} from "node-fetch-native";

// CommonJS
const {
  fetch,
  Blob,
  FormData,
  Headers,
  Request,
  Response,
  AbortController,
} = require("node-fetch-native");

Force using non-native version

Sometimes you want to explicitly use none native (node-fetch) implementation of fetch in case of issues with the native/polyfill version of globalThis.fetch with Node.js or runtime environment.

You have two ways to do this:

• Set the FORCE_NODE_FETCH environment variable before starting the application.
• Import from node-fetch-native/node

Polyfill support

Using the polyfill method, we can ensure global fetch is available in the environment and all files. Natives are always preferred.

Note: I don't recommend this if you are authoring a library! Please prefer the explicit methods.

// ESM
import "node-fetch-native/polyfill";

// CJS
require("node-fetch-native/polyfill");

// You can now use fetch() without any import!

Proxy Support

Node.js has no built-in support for HTTP Proxies for fetch (see nodejs/undici#1650 and nodejs/node#8381)

This package bundles a compact and simple proxy-supported solution for both Node.js versions without native fetch using HTTP Agent and versions with native fetch using Undici Proxy Agent.

By default, https_proxy, http_proxy, HTTPS_PROXY, and HTTP_PROXY environment variables will be checked and used (in order) for the proxy and if not any of them are set, the proxy will be disabled. You can override it using the url option passed to createFetch and createProxy utils.

By default, no_proxy and NO_PROXY environment variables will be checked and used for the (comma-separated) list of hosts to ignore the proxy for. You can override it using the noProxy option passed to createFetch and createProxy utils. The entries starting with a dot will be used to check the domain and also any subdomain.

[!NOTE] Using export conditions, this utility adds proxy support for Node.js and for other runtimes, it will simply return native fetch.

[!IMPORTANT] Proxy support is under development. Check unjs/node-fetch-native#107 for the roadmap and contributing!

fetch with proxy support

You can simply import { fetch } from node-fetch-native/proxy with a preconfigured fetch function that has proxy support.

import { fetch } from "node-fetch-native/proxy";

console.log(await fetch("https://icanhazip.com").then((r) => r.text());

createFetch utility

You can use the createFetch utility to instantiate a fetch instance with custom proxy options.

import { createFetch } from "node-fetch-native/proxy";

const fetch = createFetch({ url: "http://localhost:9080" });

console.log(await fetch("https://icanhazip.com").then((r) => r.text());

createProxy utility

createProxy returns an object with agent and dispatcher keys that can be passed as fetch options.

import { fetch } from "node-fetch-native";
import { createProxy } from "node-fetch-native/proxy";

const proxy = createProxy();
// const proxy = createProxy({ url: "http://localhost:8080" });

console.log(await fetch("https://icanhazip.com", { ...proxy }).then((r) => r.text());

Alias to node-fetch

Using this method, you can ensure all project dependencies and usages of node-fetch can benefit from improved node-fetch-native and won't conflict between node-fetch@2 and node-fetch@3.

npm

Using npm overrides:

// package.json
{
  "overrides": {
    "node-fetch": "npm:node-fetch-native@latest"
  }
}

yarn

Using yarn selective dependency resolutions:

// package.json
{
  "resolutions": {
    "node-fetch": "npm:node-fetch-native@latest"
  }
}

pnpm

Using pnpm.overrides:

// package.json
{
  "pnpm": {
    "overrides": {
      "node-fetch": "npm:node-fetch-native@latest"
    }
  }
}

License

Made with 💛 Published under the MIT license.