remix-utils
Version:
This package contains simple utility functions to use with [React Router](https://reactrouter.com/).
31 lines • 1.23 kB
JavaScript
import { data } from "react-router";
/**
* Create a new Response with a redirect set to the URL the user was before.
* It uses the Referer header to detect the previous URL. It asks for a fallback
* URL in case the Referer couldn't be found, this fallback should be a URL you
* may be ok the user to land to after an action even if it's not the same.
* @example
* export async function action({ request }: ActionFunctionArgs) {
* await doSomething(request);
* // If the user was on `/search?query=something` we redirect to that URL
* // but if we couldn't we redirect to `/search`, which is an good enough
* // fallback
* return redirectBack(request, { fallback: "/search" });
* }
*/
export function redirectBack(request, { fallback, ...init }) {
let responseInit = init;
if (typeof responseInit === "number") {
responseInit = { status: responseInit };
}
else if (responseInit.status === undefined) {
responseInit.status = 302;
}
let headers = new Headers(responseInit.headers);
headers.set("Location", request.headers.get("Referer") ?? fallback);
return data(null, {
...responseInit,
headers,
});
}
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