React Router でウェイトリストを作る

app/
  root.tsx
  routes.ts
  routes/home.tsx
  routes/pricing.tsx
  routes/waitlist.tsx
  components/waitlist-form.tsx
react-router.config.ts
.env

IKIFORM_SECRET_KEY=ik_sk_your_secret_key

{
  "version": 1,
  "title": "Waitlist",
  "fields": [
    { "id": "email", "type": "email", "label": "Email", "required": true, "placeholder": "you@company.com" },
    { "id": "ref", "type": "text", "label": "Source", "validation": { "max_length": 40 } }
  ]
}

import { index, type RouteConfig, route } from "@react-router/dev/routes";

export default [
  index("routes/home.tsx"),
  route("pricing", "routes/pricing.tsx"),
  route("waitlist", "routes/waitlist.tsx"),
] satisfies RouteConfig;

import { data } from "react-router";
import { WaitlistForm } from "../components/waitlist-form";
import type { Route } from "./+types/waitlist";

const EMAIL = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
const SOURCE = /^[a-z0-9_-]{1,40}$/;

export async function action({ request }: Route.ActionArgs) {
  const form = await request.formData();
  const email = String(form.get("email") ?? "").trim();
  if (!EMAIL.test(email)) {
    return data({ ok: false, message: "Enter the email we should send your invite to.", email }, { status: 400 });
  }
  const ref = String(form.get("ref") ?? "");

  const response = await fetch("https://ikiform.com/f/frm_xxxxxxxxxxxxxxxx", {
    method: "POST",
    headers: {
      Accept: "application/json",
      "Content-Type": "application/json",
      Authorization: `Bearer ${process.env.IKIFORM_SECRET_KEY}`,
      Origin: request.headers.get("origin") ?? "",
    },
    body: JSON.stringify({
      email,
      ref: SOURCE.test(ref) ? ref : "direct",
      _gotcha: String(form.get("_gotcha") ?? ""),
    }),
    signal: AbortSignal.timeout(8000),
  }).catch(() => null);

  const result = await response?.json().catch(() => null);
  if (result?.ok) return { ok: true, message: "You're on the list. We'll email you on launch day.", email };
  return data(
    {
      ok: false,
      message: result?.error?.fields?.email?.[0] ?? result?.error?.message ?? "Couldn't join the list. Try again.",
      email,
    },
    { status: response?.status === 429 ? 429 : 400 },
  );
}

export default function Waitlist({ actionData }: Route.ComponentProps) {
  return (
    <main>
      <h1>Join the Acme waitlist</h1>
      <WaitlistForm initial={actionData} />
    </main>
  );
}

import { useFetcher, useLocation } from "react-router";

interface Outcome {
  ok: boolean;
  message: string;
  email: string;
}

export function sourceFor(pathname: string) {
  const slug = pathname.replace(/^\/+|\/+$/g, "").replace(/\//g, "-").toLowerCase();
  return (slug || "home").slice(0, 40);
}

export function WaitlistForm({ initial }: { initial?: Outcome }) {
  const fetcher = useFetcher<Outcome>({ key: "waitlist" });
  const { pathname } = useLocation();
  const outcome = fetcher.data ?? initial;
  const pending = fetcher.state !== "idle";

  if (outcome?.ok) return <p role="status">{outcome.message}</p>;

  return (
    <fetcher.Form method="post" action="/waitlist">
      <label>
        Email
        <input name="email" type="email" autoComplete="email" required defaultValue={outcome?.email} />
      </label>
      <input type="hidden" name="ref" value={sourceFor(pathname)} />
      <input name="_gotcha" type="text" tabIndex={-1} autoComplete="off" hidden />
      <p role="alert">{outcome?.message}</p>
      <button disabled={pending}>{pending ? "Joining" : "Join the waitlist"}</button>
    </fetcher.Form>
  );
}

export function JoinedNote() {
  const fetcher = useFetcher<Outcome>({ key: "waitlist" });
  return fetcher.data?.ok ? <span>You're on the list</span> : <a href="#waitlist">Join the waitlist</a>;
}

import type { ShouldRevalidateFunctionArgs } from "react-router";

export function shouldRevalidate({ formAction, defaultShouldRevalidate }: ShouldRevalidateFunctionArgs) {
  if (formAction === "/waitlist") return false;
  return defaultShouldRevalidate;
}

import type { Config } from "@react-router/dev/config";

export default {
  ssr: true,
  prerender: ["/", "/pricing"],
} satisfies Config;