FEEDBACK FORM · AJAX (VANILLA JS)

Feedback Form for AJAX (vanilla JS)

Rating + free-text feedback with optional follow-up email. Free for 500 submissions per month — no backend, no SDK, no plugin.

Get free access key Copy the code

500/mo free·no card·drop-in for AJAX (vanilla JS)

form.htmlhtml23 lines

01<form action="https://splitforms.com/api/submit" method="POST">
02  <input type="hidden" name="access_key" value="YOUR_ACCESS_KEY">
03  <input type="hidden" name="subject" value="New feedback submission">
04 
05  <label for="rating">How would you rate your experience? *</label>
06  <select id="rating" name="rating" required>
07    <option value="">Choose…</option>
08    <option>★★★★★</option>
09    <option>★★★★☆</option>
10    <option>★★★☆☆</option>
11    <option>★★☆☆☆</option>
12    <option>★☆☆☆☆</option>
13  </select>
14  <label for="feedback">What can we do better? *</label>
15  <textarea id="feedback" name="feedback" placeholder="Be honest — we won't take it personally." required></textarea>
16  <label for="email">Email (optional, for follow-up)</label>
17  <input id="email" type="email" name="email" placeholder="you@example.com">
18 
19  <!-- honeypot — bots fill every field -->
20  <input type="checkbox" name="botcheck" style="display:none" tabindex="-1" autocomplete="off">
21 
22  <button type="submit">Send</button>
23</form>

500

submissions / mo, free

fields, ready to ship

code outputs

60s

from copy to inbox

§ 00AJAX (vanilla JS) + Feedback Formplatform-specific integration guide

Why AJAX (vanilla JS) developers choose splitforms for feedback form

The feedback form on this page integrates with AJAX (vanilla JS)'s development workflow using the form markup in your AJAX (vanilla JS) project. Whether you're deploying to a static host or a server-rendered platform, the form posts standard <code>FormData</code> to splitforms, so your backend complexity stays at zero. AJAX (vanilla JS)'s ecosystem has strong tooling for UI, but form delivery is a separate concern that splitforms handles independently — Free includes spam filtering and a submissions dashboard; Starter adds email notifications and webhooks.

§ 00Quick answerHTML · feedback

Yes — this is the shortest safe path for AJAX (vanilla JS).

Use the HTML snippet on this page, keep the feedback form fields visible in your AJAX (vanilla JS) UI, and let splitforms handle delivery, spam filtering, storage, and webhooks.

best implementation

Paste the HTML version, then replace YOUR_ACCESS_KEY.

The posted payload contains how would you rate your experience?, what can we do better?, email (optional, for follow-up). Required fields are how would you rate your experience? and what can we do better?.

native ajax (vanilla js) reality

Vanilla JS / AJAX forms have been the no-framework default since jQuery's heyday.

use case fit

Customer feedback is the cheapest product research you have. The form captures NPS / CSAT plus an open comment — and routes negative responses to a Slack channel for same-day triage.

§ 01Feedback Form × AJAX (vanilla JS)why this combination, in 80 words

Built for AJAX (vanilla JS) developers who hate operating a backend.

Splitforms is the form backend for AJAX (vanilla JS) sites. One POST endpoint, no SDK, no plugin — drop the feedback form into a page and ship.

Splitforms is the form backend for AJAX (vanilla JS) sites. One POST endpoint, spam filtering, and a real dashboard — drop-in, no server, no PHP. Free for 500 dashboard submissions per month; Starter adds email, signed webhooks, exports, and retained uploads; Pro is $5/mo for 5,000.

✦ what you get on the free plan

✓500 form submissions per month
✓2 forms on Free; unlimited forms on Pro
✓Spam protection (honeypot + classifier)
✓Webhooks: Slack, Discord, WhatsApp, custom
✓CSV export of all submissions
✓Email notifications (CC and BCC on Pro)

§ 02Copy-paste codeHTML · 23 lines

Drop into any AJAX (vanilla JS) project.

Replace YOUR_ACCESS_KEY with your splitforms key, paste into a AJAX (vanilla JS) page, and ship. No build-time integration required.

form.htmlhtml23 lines

01<form action="https://splitforms.com/api/submit" method="POST">
02  <input type="hidden" name="access_key" value="YOUR_ACCESS_KEY">
03  <input type="hidden" name="subject" value="New feedback submission">
04 
05  <label for="rating">How would you rate your experience? *</label>
06  <select id="rating" name="rating" required>
07    <option value="">Choose…</option>
08    <option>★★★★★</option>
09    <option>★★★★☆</option>
10    <option>★★★☆☆</option>
11    <option>★★☆☆☆</option>
12    <option>★☆☆☆☆</option>
13  </select>
14  <label for="feedback">What can we do better? *</label>
15  <textarea id="feedback" name="feedback" placeholder="Be honest — we won't take it personally." required></textarea>
16  <label for="email">Email (optional, for follow-up)</label>
17  <input id="email" type="email" name="email" placeholder="you@example.com">
18 
19  <!-- honeypot — bots fill every field -->
20  <input type="checkbox" name="botcheck" style="display:none" tabindex="-1" autocomplete="off">
21 
22  <button type="submit">Send</button>
23</form>

§ 03Setup3 steps · 60 seconds · zero config

Generate, embed, receive.

Three actions stand between you and your first feedback form submission. None of them require a backend, a database, or a CAPTCHA library.

STEP 01GENERATE

Generate a free splitforms key

Create your form

key=sk_live_••••••••

STEP 02EMBED

Paste the feedback form into your AJAX (vanilla JS) project

Drop the form snippet into a AJAX (vanilla JS) page, component, or layout. Replace YOUR_ACCESS_KEY with the key from your dashboard. The form action is a hard-coded URL — no env vars or build-time wiring needed.

snippethtml

<form action="https://splitforms.com/api/submit" method="POST">
  …
</form>

STEP 03RECEIVE

Receive submissions

Dashboard updates live on Free. Starter adds email delivery, signed webhooks, CSV export, Slack/Discord forwarding, and BCC to your team.

inbox · 1 newjust now

FROM contact@yoursite.com

New feedback submission

Maya Iyer maya@studio71.co

Loved the demo — quick question about pricing on the 3-year plan. Are usage limits per project or account-wide?

§ 03bCustomer Feedback Form (NPS / CSAT / Open-Ended)template-specific playbook

The reason this feedback form exists.

Webhooks into Slack / Linear / Productboard · NPS detractor triage in minutes.

why it matters

Feedback forms cost almost nothing to ship and pay back disproportionately — every NPS detractor (score 0-6) is a conversation that prevents churn, every promoter (9-10) is a referral or testimonial source. The form is simple: 0-10 rating, an optional comment, and an email. The leverage is in the routing: detractors auto-DM your support lead in Slack within minutes, promoters get a 'mind leaving us a G2 / Trustpilot review?' follow-up, passives go into a digest. Survey tools (SurveyMonkey, Typeform, Hotjar) charge $30-100/mo for the same pattern. The form pattern is 30 lines of HTML.

route the submission

Capture rating + comment

Required: 0-10 NPS rating (or 1-5 CSAT for transactional surveys). Optional: comment textarea, email for follow-up. Keep it minimal — long surveys tank completion.

Route by score

Webhook branches on score: 0-6 (detractors) DM Slack support channel; 7-8 (passives) go to weekly digest; 9-10 (promoters) trigger a G2 / Trustpilot review-request email.

Push to your tools

Detractor comments to Linear / Productboard for product triage. Promoter quotes to a 'testimonials' Notion database for marketing. Raw data to a CSV / BigQuery / dbt warehouse for trend analysis.

§ 03cAJAX (vanilla JS) production notesnative path · deploy · gotchas

What changes when this feedback form lives in AJAX (vanilla JS).

These notes come from the AJAX (vanilla JS) platform registry and are rendered on this template page so crawlers see the framework-specific answer without opening a separate guide.

without splitforms

Vanilla JS / AJAX forms have been the no-framework default since jQuery's heyday. Without splitforms, the 'AJAX' part is one fetch line; the operational part is everything else: a backend route, an SMTP provider, a database for submissions, a honeypot or reCAPTCHA, a thank-you page, error handling for HTTP 4xx/5xx, retry logic. For 'JS-only on a static host' setups (Cloudflare Pages, GitHub Pages, S3), there's literally no server to run the route on — historically that meant Formspree, Formspark, Web3Forms, Basin. Splitforms is the modern entry: same shape, better free tier, better spam filtering, and signed webhooks from Starter.

deploy notes

Vanilla JS deploys to any static host — the snippet is HTML + inline <script>, no build step. CSP: if your site sets connect-src 'self', add https://splitforms.com to the directive or fetch is blocked. Browser support: native fetch is in every browser back to Edge 18 — the snippet runs without polyfills on every market-share-relevant browser. The progressive-enhancement variant (Pattern B) keeps the form working when JS fails to load — useful on flaky networks, ad-blocked clients, or for accessibility tools that disable JS.

AJAX (vanilla JS) gotcha

Forgetting e.preventDefault() reloads the page

Without preventDefault, the browser does its own form submission to wherever the form's action attribute points (or the current page) AND your fetch runs. You see a flash, the page reloads, and your handler's effects are lost.

AJAX (vanilla JS) gotcha

FormData includes ALL form fields — even disabled ones get dropped

new FormData(form) skips inputs without a name attribute, skips disabled inputs, skips unchecked checkboxes/radios. If a field doesn't show up in your splitforms inbox, check whether it's disabled at submit time.

AJAX (vanilla JS) gotcha

fetch() doesn't reject on HTTP 4xx/5xx — only network errors

If splitforms returns a 401 (bad key) or 429 (rate limit), fetch resolves successfully. You have to check res.ok or data.success yourself. Wrapping in try/catch only catches network failures, not HTTP errors.

AJAX (vanilla JS) gotcha

Double-click submit fires two requests

Without disabling the button on the first click, a quick double-click sends two POSTs. Both succeed; the user sees one success message; you see two submissions. Always set button.disabled = true at the start of the handler.

PATTERN A

Pattern A — fetch + FormData + status element

Single submit listener. new FormData(form) reads inputs, append the access key, POST. Update an aria-live status <p> with the result. ~25 lines, no library. Use the same wiring for the feedback form fields on this page.

pattern-a.htmlhtml16 lines

01<form id="cf">
02  <input name="email" type="email" required />
03  <textarea name="message" required></textarea>
04  <button type="submit">Send</button>
05  <p id="msg" aria-live="polite"></p>
06</form>
07<script>
08  document.getElementById("cf").addEventListener("submit", async (e) => {
09    e.preventDefault();
10    const fd = new FormData(e.currentTarget);
11    fd.append("access_key", "YOUR_ACCESS_KEY");
12    const r = await fetch("https://splitforms.com/api/submit", { method: "POST", body: fd });
13    const data = await r.json();
14    document.getElementById("msg").textContent = data.success ? "Thanks!" : (data.message || "Try again");
15  });
16</script>

PATTERN B

Pattern B — progressive enhancement (works without JS)

Form has a real action attribute and a redirect hidden field — works with JS disabled (browser POSTs natively, splitforms 302s). When JS is available, the listener intercepts for inline UX. Best of both worlds, no compromise. Use the same wiring for the feedback form fields on this page.

pattern-b.htmlhtml13 lines

01<form id="cf" action="https://splitforms.com/api/submit" method="POST">
02  <input type="hidden" name="access_key" value="YOUR_ACCESS_KEY" />
03  <input type="hidden" name="redirect"   value="/thanks.html" />
04  <input name="email" type="email" required />
05  <button type="submit">Send</button>
06</form>
07<script>
08  document.getElementById("cf").addEventListener("submit", async (e) => {
09    e.preventDefault();
10    const r = await fetch(e.target.action, { method: "POST", body: new FormData(e.target) });
11    if ((await r.json()).success) location.href = "/thanks.html";
12  });
13</script>

§ 04Field-by-field rundown3 fields · names you POST

What every field actually does.

Each field below ships in the feedback form template — rename, remove, or add your own. Splitforms accepts any name you POST.

ratingREQUIRED

SELECT

How would you rate your experience?

NPS / CSAT signal — quantitative complement to the comment field.

★★★★★★★★★☆★★★☆☆★★☆☆☆★☆☆☆☆

feedbackREQUIRED

TEXTAREA

What can we do better?

Free-text input — no character limit, expands as the visitor types.

placeholder · Be honest — we won't take it personally.

Email (optional, for follow-up)

Reply-to address — splitforms wires this so hitting reply goes back to the sender.

placeholder · you@example.com

§ 05Feedback Form on other frameworks22 frameworks · same backend

One backend. Every framework.

The same feedback form template works on every framework splitforms supports. Pick yours.

§ 06Questions9 answered

Feedback Form on AJAX (vanilla JS) — FAQ.

Direct answers, no marketing fluff. Missing one? Email hello@splitforms.com.

01Does this feedback form work on AJAX (vanilla JS)?

Yes. The form is plain HTML with a single POST endpoint, so it runs on any AJAX (vanilla JS) site without server-side code, plugins, or SDKs. Drop the snippet into a AJAX (vanilla JS) page or component and submissions land in your splitforms dashboard.

02How much does the feedback form cost on AJAX (vanilla JS)?

Free for 500 submissions per month — no credit card, no trial. Pro is $5/mo for 5,000 submissions, and there's a one-time $59 3-year plan (15,000 submissions/mo for 36 months). The same pricing applies regardless of which framework hosts the form.

03Can I customize the fields?

Yes. The template ships with sensible defaults (how would you rate your experience?, what can we do better?, email (optional, for follow-up)…) — add, remove, or rename any of them. Splitforms accepts whatever fields you POST.

04How does spam protection work on the feedback form?

A hidden honeypot field catches dumb bots, and a tuned classifier scores the rest. You only see real submissions in your dashboard. No CAPTCHA, no friction for human users — and it works the same on AJAX (vanilla JS) as on any other framework.

05Can I send the feedback form submissions to Slack or Discord?

Yes. Webhooks are available on Starter and above, with auto-formatted payloads for Slack, Discord, and WhatsApp (via CallMeBot). Or send raw signed JSON to any URL — Zapier, n8n, your own server. Configure in the splitforms dashboard.

06Will it work on a static AJAX (vanilla JS) site?

Yes — the form posts directly to splitforms from the browser, so no server is involved. Works on Vercel, Netlify, GitHub Pages, Cloudflare Pages, S3, or any plain Apache host.

07Should I use NPS or CSAT?

NPS (0-10) for relationship surveys ('how likely are you to recommend us?') sent quarterly or after major moments. CSAT (1-5) for transactional surveys ('how was this support ticket?') sent right after the interaction. Different questions, different cadences, both common patterns.

08Will I get response bias from a public form?

Yes — open-link feedback skews toward people with strong feelings (positive or negative). For statistically representative measurement, send the survey via email to a random sample of users. The public form catches the heat-of-moment feedback you'd otherwise miss.

09Can I push to Slack / Linear / Productboard?

Yes — webhook the JSON. Slack has incoming webhooks (free); Linear and Productboard accept inbound issue creation via Zapier or native APIs. Detractor comments showing up as a Linear issue with the rating prefilled in the title is a powerful workflow.

§ 07Comparisonvs Web3Forms · vs Formspree

splitforms vs everything else.

Same drop-in API. More free submissions, Starter signed webhooks, MCP support no other backend has.

Feature	Web3Forms	Formspree	splitforms
Free monthly submissions	250	50	500
Custom fields beyond contact	Yes	Pro tier	Free
Webhooks (Slack / Discord)	Pro tier	Pro tier	Free, signed
AI / MCP submission inbox	No	No	Yes
Long-term plan (3-year flat)	—	—	$59 every 3 years

§ 08More templates for AJAX (vanilla JS)0 adjacent patterns

Ship a feedback form on AJAX (vanilla JS) in 60 seconds.

500 submissions per month, free forever. No credit card. Copy the snippet above and paste it into your AJAX (vanilla JS) project.

Get free access key →Read the docs

founders pricing locked in · early access open

Feedback Form for AJAX (vanilla JS)

Why AJAX (vanilla JS) developers choose splitforms for feedback form

Yes — this is the shortest safe path for AJAX (vanilla JS).

Paste the HTML version, then replace YOUR_ACCESS_KEY.

Built for AJAX (vanilla JS) developers who hate operating a backend.

Drop into any AJAX (vanilla JS) project.

Generate, embed, receive.

Generate a free splitforms key

Paste the feedback form into your AJAX (vanilla JS) project

Receive submissions

The reason this feedback form exists.

Capture rating + comment

Route by score

Push to your tools

What changes when this feedback form lives in AJAX (vanilla JS).

Forgetting e.preventDefault() reloads the page

FormData includes ALL form fields — even disabled ones get dropped

fetch() doesn't reject on HTTP 4xx/5xx — only network errors

Double-click submit fires two requests

Pattern A — fetch + FormData + status element

Pattern B — progressive enhancement (works without JS)

What every field actually does.

How would you rate your experience?

What can we do better?

Email (optional, for follow-up)

One backend. Every framework.

Feedback Form on AJAX (vanilla JS) — FAQ.

splitforms vs everything else.

Other ready-to-ship AJAX (vanilla JS) forms.

Ship a feedback form on AJAX (vanilla JS) in 60 seconds.