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Web Fetch API

When browsers added window.fetch, they also add three other objects: Headers, Request, and Response. Remix is built upon this API.

When you do this:

const res = await fetch(url);

That res is an instance of Response. And you can make a response yourself:

const res = new Response(
  JSON.stringify({ hello: "there" })
);
const json = await res.json();
console.log(json);
// { hello: "there" }

Rather than pick a server-side API, Remix adopts the Web Fetch API for all http handling. Note that our deployment wrappers like @remix-run/express are simply adapters between the deployment server's API and the Web API. @remix-run/express interprets a Web API Response that you return from a loader or your server entry into an express response.

While you can use these APIs directly in Remix, you'll typically use response helpers instead:

Globally Available

Remix adds Request, Response, Headers, and fetch to your loader's global context, so you can use them anywhere just like in the browser. We figure if "what".blink() made it into the global context of node, we can add these browser globals to make Remix a little nicer to work with.

MDN Docs

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

Docs and examples licensed under MIT