How do I avoid a full page navigation on submit?

Add a small client-side script that calls `fetch()` with `Accept: application/json` and shows your own success state.

Can I keep Astro's zero-JS promise?

Yes — the plain ` ` variant uses no JavaScript at all.

Astro guide

Astro ships zero JS by default, and your contact form shouldn't break that. With FormLoom you write a normal `<form action method="POST">` in an `.astro` page and it just works on a fully static build — no API routes, no server adapter, no client island. If you want AJAX with a success state, add a tiny `<script>` island; otherwise the plain form is the whole integration.

Approach

Drop a `<form action="https://api.formloom.ai/submit/KEY" method="POST">` into any `.astro` page. For an inline success message without a full page reload, progressively enhance with a small client-side script.

Code

src/pages/contact.astro

---
// src/pages/contact.astro — static, no server needed
---
<form action="https://formloom.vercel.app/api/submit/YOUR_ACCESS_KEY" method="POST">
  <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>

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>

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,
});

Gotchas

On a static Astro build there is no server — so use the plain HTML form (browser POSTs directly to FormLoom) rather than an Astro endpoint.
If you use Astro's hybrid/server output and want server-side handling, create an API route that forwards to FormLoom — but for most static sites you don't need one.
Add a hidden `redirect` field to send users to a thank-you page after submit.

FAQ

No. The plain HTML form POSTs directly to FormLoom from the browser, so it works on a fully static build with no adapter.

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