Remix Strong Routes

Worry-free Remix routes with Typescript 💪

Table of Contents

• Background
• Install
• Usage
  • Returning Data inside loader and action
  • Uncaught Errors
  • Define Types
  • Define Loader
  • Define Action
  • Define Route Component
  • Define Error Boundary
  • Configure & Export Route
  • Call Another Route's Loaders
• Contributing
• License

Background

Remix loaders and actions have generally good typescript support, but this project aims to ensure the data types passed around Remix routes are strongly typed. There are three things that can happen in a Remix loader or action:

• Success
• Failure
• Redirects

This library exposes a tiny buildStrongRoute function that adds a small amount of validation logic to Remix's default routing behavior. The good part about this library, is that you do not have to use buildStrongRoute everywhere - you can opt in or out of its behavior per route.

Install

npm install remix-strong-routes

Usage

Returning Data inside loader and action

There are 3 possible options when returning data in a StrongLoader or StrongAction

• Send data to your component with the succeed helper
• Send data to your error boundary with the fail helper.
• Perform an HTTP redirect using the redirect helper

Uncaught Errors

If your strong route loader or action calls toErrorBoundary, but was not built with a StrongErrorBoundary, the error will bubble up to the Remix root error boundary.

Define Types

import {
  StrongResponse,
  StrongRedirect,
  HttpStatusCode,
} from "remix-strong-routes";

type FooResponse = StrongResponse<"Foo", HttpStatusCode.OK>;

type BarResponse = StrongResponse<"Bar", HttpStatusCode.INTERNAL_SERVER_ERROR>;

type RedirectToLogin = StrongRedirect<
  "/login",
  HttpStatusCode.MOVED_PERMANENTLY
>;

Define Loader

import { strongLoader } from "remix-strong-routes";

const loader = strongLoader<BarResponse, FooResponse, RedirectToLogin>(
  async ({ context, request, params }, { fail, redirect, succeed }) => {
    // Try to validate a session
    if (await isUserLoggedIn(request)) {
      // Build a redirect object
      const redirectToLogin: RedirectToLogin = {
        data: "/login",
        status: HttpStatusCode.MOVED_PERMANENTLY,
      };

      // Return a type-safe redirect
      return redirect(redirectToLogin);
    }

    try {
      // Try to load some data
      const fooData = await getFooData();

      // Build a type-safe response object
      const fooResponse: FooResponse = {
        data: fooData,
        status: HttpStatusCode.OK,
      };

      // Return a type-safe success to your component
      return succeed(fooResponse);
    } catch (e) {
      // Build a type-safe response object
      const barResponse: BarResponse = {
        data: "Bar",
        status: HttpStatusCode.INTERNAL_SERVER_ERROR,
      };

      // Return a type-safe error to your error boundary
      return fail(barResponse);
    }
  },
);

Define Action

import { strongAction } from "remix-strong-routes";

const action - strongAction<
  BarResponse,
  FooResponse,
  RedirectToLogin
>(async (
  { context, request, params },
  { fail, redirect, succeed }
) => {
  // ... Same as the loader
});

Define Route Component

import { StrongComponent } from "remix-strong-routes";

const strongComponent: StrongComponent<FooResponse> = ({ status, data }) => {
  return (
    <ul>
      <li>Status: {status}</li>
      <li>Data: {data}</li>
    </ul>
  );
};

Define Error Boundary

import { StrongErrorBoundary } from "remix-strong-routes";

const strongErrorBoundary: StrongErrorBoundary<BarResponse> = ({
  status,
  data,
}) => {
  return (
    <ul>
      <li>Status: {status}</li>
      <li>Data: {data}</li>
    </ul>
  );
};

Configure & Export Route

import { buildStrongRoute } from "remix-strong-routes";

// Build strongly typed route exports
const route = buildStrongRoute<LoaderResponse>({
  routeId: "root",
  loader: strongLoader,
  action: strongAction,
  Component: strongComponent,
  ErrorBoundary: strongErrorBoundary,
});

// Export parts
export const action = route.action;
export const loader = route.loader;
export const ErrorBoundary = route.ErrorBoundary;
export default route.Component;

Call Another Route's Loader

This library uses buildStrongRoute to expose a more ergonomic useRouteLoaderData hook, which is a wrapper around the default Remix useRouteLoaderData hook. There are no guardrails in place within remix-strong-routes to enforce a route's parent-child relationship so it may be a defect if your application is not setup correctly. This may be improved when Remix exposes its route configurations under the hood.

The purpose of this hook is to prevent the need to remember a route's ID more than one time.

You can run npx remix routes --json to reveal all of the route IDs in your app.

import { buildStrongRoute } from "remix-strong-routes";

// Build strongly typed route exports
const route1 = buildStrongRoute<LoaderResponse>({
  // This routeId MUST be precisely what Remix expects
  routeId: "root",
  loader: strongLoader,
  action: strongAction,
  Component: strongComponent,
  ErrorBoundary: strongErrorBoundary,
});

const route2 = buildStrongRoute<LoaderResponse>({
  routeId: "routes/home",
  Component: () => {
    // If route1.routeId is not accurate, this will fail.
    const route1Data = route1.useRouteLoaderData();

    return <pre>{JSON.stringify(route1Data, null, 2)}</pre>;
  },
});

Contributing

PRs accepted.

License

MIT