Controlled or uncontrolled inputs?

Uncontrolled with `FormData` is the least code. Use controlled inputs only if you need live validation UI.

How do I handle file uploads?

Send the raw `FormData` as the fetch body and don't set `Content-Type` — the browser adds the multipart boundary automatically.

React guide

In a plain React SPA (Vite, CRA, etc.) you don't have a backend — which is exactly the case FormLoom is built for. Wire an `onSubmit` handler that serializes the form and `fetch`es FormLoom. You get a stored submission, a spam score, and a transactional email without standing up an API.

Approach

Use an uncontrolled form with `new FormData(e.currentTarget)` for the least code, or controlled inputs with `useState` if you need validation UI. POST JSON with `Accept: application/json`.

Code

ContactForm.tsx

// ContactForm.tsx — React (works in Vite, CRA, Next 'use client')
"use client";
import { useState } from "react";

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

  async function onSubmit(e: React.FormEvent<HTMLFormElement>) {
    e.preventDefault();
    const form = e.currentTarget;
    const res = await fetch("https://formloom.vercel.app/api/submit/YOUR_ACCESS_KEY", {
      method: "POST",
      headers: { "Content-Type": "application/json", Accept: "application/json" },
      body: JSON.stringify(Object.fromEntries(new FormData(form))),
    });
    setStatus((await res.json()).success ? "ok" : "error");
    if (status !== "error") form.reset();
  }

  if (status === "ok") return <p>Thanks — we got your message.</p>;
  return (
    <form onSubmit={onSubmit}>
      <label>
        Name
        <input type="text" name="name" required />
      </label>
      <label>
        Email
        <input type="email" name="email" required />
      </label>
      <label>
        Message
        <textarea name="message" required placeholder="How can we help?"></textarea>
      </label>
      <!-- honeypot: bots fill this, humans don't see it -->
      <input type="checkbox" name="botcheck" style="display:none" tabindex="-1" autocomplete="off" />
      <button type="submit">Send</button>
    </form>
  );
}

submit.ts

// npm i @formloom/client
import { createForm } from "@formloom/client";

type Contact = {
  name: string;
  email: string;
  message: string;
};

const form = createForm<Contact>("YOUR_ACCESS_KEY");

// End-to-end typed: TS errors if you send the wrong shape.
const { success, message } = await form.submit({
  name: form.name.value,
  email: form.email.value,
  message: form.message.value,
});

contact.html

<form id="contact-form">
  <label>
    Name
    <input type="text" name="name" required />
  </label>
  <label>
    Email
    <input type="email" name="email" required />
  </label>
  <label>
    Message
    <textarea name="message" required placeholder="How can we help?"></textarea>
  </label>
  <!-- honeypot: bots fill this, humans don't see it -->
  <input type="checkbox" name="botcheck" style="display:none" tabindex="-1" autocomplete="off" />
  <button type="submit">Send</button>
</form>

<script>
const form = document.getElementById("contact-form");
form.addEventListener("submit", async (e) => {
  e.preventDefault();
  const res = await fetch("https://formloom.vercel.app/api/submit/YOUR_ACCESS_KEY", {
    method: "POST",
    headers: { "Content-Type": "application/json", Accept: "application/json" },
    body: JSON.stringify(Object.fromEntries(new FormData(form))),
  });
  const data = await res.json();
  if (data.success) {
    form.reset();
    alert("Thanks — we got your message.");
  } else {
    alert(data.message || "Something went wrong.");
  }
});
</script>

Gotchas

Call `e.preventDefault()` so the browser doesn't do a full navigation.
Mark the component `"use client"` if you're inside Next.js App Router.
For file uploads, send the raw `FormData` (don't JSON.stringify) and omit the `Content-Type` header so the browser sets the multipart boundary.

FAQ

No. FormLoom is the backend — your React app POSTs directly to it from the browser.

See the full React contact form page with a live demo.