Next.js 联系表单（无需后端）

<form action="https://formhook.app/f/YOUR_API_KEY" method="POST">
  <label>
    Email
    <input type="email" name="email" required />
  </label>

  <label>
    Message
    <textarea name="message" required></textarea>
  </label>

  <!-- honeypot: bots fill this; humans don't see it -->
  <input type="text" name="_gotcha" tabindex="-1" autocomplete="off" hidden />

  <!-- optional: send users to a thank-you page after a native POST -->
  <input type="hidden" name="_redirect" value="https://example.com/thanks" />

  <button type="submit">Send</button>
</form>

"use client";

import { useState } from "react";

export function ContactForm() {
  const [status, setStatus] = useState<"idle" | "sending" | "ok" | "error">("idle");

  async function onSubmit(e: React.FormEvent<HTMLFormElement>) {
    e.preventDefault();
    setStatus("sending");

    const form = e.currentTarget;
    const data = Object.fromEntries(new FormData(form));

    const res = await fetch("https://formhook.app/f/YOUR_API_KEY", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify(data),
    });

    setStatus(res.ok ? "ok" : "error");
    if (res.ok) form.reset();
  }

  if (status === "ok") return <p>Thanks - we'll be in touch.</p>;

  return (
    <form onSubmit={onSubmit}>
      <input type="email" name="email" placeholder="Email" required />
      <textarea name="message" placeholder="Message" required />
      <input type="text" name="_gotcha" tabIndex={-1} hidden />
      <button type="submit" disabled={status === "sending"}>
        {status === "sending" ? "Sending…" : "Send"}
      </button>
      {status === "error" && <p>Something went wrong. Please try again.</p>}
    </form>
  );
}