• Fix missing files in the isomorphic-unfetch@4.0.1 and 4.0.0 releases.

Full Changelog: isomorphic-4.0.1...isomorphic-4.0.2

What's Changed

• Add TypeScript definitions and export them @developit in #159
• Add Package Exports to both unfetch and isomorphic-unfetch

New Contributors

• @RishikeshDarandale made their first contribution to isomorphic-unfetch in #156

Full Changelog: 4.2.0...5.0.0

What's Changed

• update node-fetch to 3.x by @RishikeshDarandale in #156
• (in unfetch core) add TypeScript definitions by @developit in #159

New Contributors

• @RishikeshDarandale made their first contribution in #156

Full Changelog: isomorphic-3.1.0...isomorphic-4.0.1

• Fix unintentional use of arrow functions in some 4.1.0 builds (#138, thanks @simon04!)
• Fix usage in Web Workers (#109)
• .json() parse errors return a rejected Promise instead of throwing (#112, thanks @sunsean!)
• Improved TypeScript typings (#117 & #121, thanks @Andarist & @0x80!)
• Add support for passing URL objects to fetch() (#141, thanks @Edorka for the tip!)

Please make sure to also update to isomorphic-unfetch@3.1.0, which includes a security fix for node-fetch. (thanks @sakito21)

• Fix TypeScript definitions (#99 #105 - thanks @stephenmathieson & @fnatte!)
• Drop another 20 bytes, now 478b 🐕

Quick publishing fix.

🦄 Small breaking change for awesome ponyness:

• unfetch is now a pure ponyfill.
• unfetch/polyfill is now the polyfill version (even smaller than the ponyfill!)
• All modules are shipped in all formats, and the polyfill is now < 500b.
• Also a little bugfix for IE11 (#85, thanks @khusa)

TL;DR: require('unfetch') no longer returns window.fetch when it exists. For that, use unfetch/polyfill.

This change makes unfetch lovely to use as a polyfill from HTML:

<script src="https://unpkg.com/unfetch/polyfill"></script>
<!-- that's it! -->
<script>foo = await fetch('/foo.json')</script>

Otherwise, if you're using Unfetch and bundling your code, continue as you were before:

if (!self.fetch) self.fetch = require('unfetch');
// or simply:
import 'unfetch/polyfill';

Important - the one thing to avoid:

Since unfetch is a proper ponyfill, it will now overwrite fetch even in supported browsers if you do the following

// never do this!
window.fetch = require('unfetch');

• Fixes an IE11 bug (#85, thanks @khusa!)

• Fixes a little TypeScript definition issue in unfetch@3.1.0 / isomorphic-unfetch@2.1.0. Thanks @schonert & @wereHamster.

Also released: isomorphic-unfetch@2.1.0 - now with node-fetch 2.x, TypeScript definitions and a readme.

• TypeScript definitions!
• Fixes a bug in response status code parsing
• Fixes XHR being potentially synchronous in really old browsers
• Fixes parsing of empty header values
• Serves up the umd bundle on unpkg.com