# Release Updates Signup block

> Dark newsletter signup banner with inline email join form and a rotating WebGL night Earth

Release updates signup: an @-prefixed email field and Join button swap to an aria-live confirmation on submit, over a 3px dot mesh and a blue bloom that pulses on a 12s loop. shadcn Card, Input Group, Button. Changelog, product news.

- Type: Pro block
- Category: [CTA](https://web.dev.reui.io/blocks/marketing/cta.md)
- Page: https://web.dev.reui.io/blocks/marketing/cta/cta-14
- MCP: `get_block("cta-14")`
- Built with: Button, Card, Input Group
- Installs with a ReUI Pro or Ultimate license; setup: https://web.dev.reui.io/docs/license-setup

## Best for

A dark newsletter banner whose one email field and Join button give way to a polite live confirmation on submit

## Agent notes

- `onSubmit` only calls `preventDefault` and sets `joined`, so the email goes nowhere; send the address to your list or API there
- The confirmation shown when `joined` is true is fixed copy promising a Thursday issue, with no error or retry state; match it to your real send day
- `EARTH` is an Unsplash night photo that doubles as the WebGL texture; a different image needs matching `DISC` values in planet.tsx

## When not to use

- Many labeled fields in rows, with selects and checkbox groups to fill in: use the [Form blocks](https://web.dev.reui.io/blocks/application/form.md)
- A version history listing releases with dates and change badges: use [Release Changelog](https://web.dev.reui.io/blocks/application/timeline/timeline-5.md) (`get_block("timeline-5")`)

## Install

```bash
npx shadcn@latest add @reui/cta-14
```

## About CTA blocks

### When to use

- A closing get started band with a headline and 1 or 2 actions, some backed by logos, avatars or a rating
- Email capture for a newsletter, a waitlist or release updates, with an inline email field and submit button
- A sales prompt that books a call or opens a contact route rather than a self-serve signup

### When not to use

- The first screen of a page, with the main headline and a product console above the fold: use the [Hero blocks](https://web.dev.reui.io/blocks/marketing/hero.md)
- A compact promo tile with 1 button, sized to sit beside other cards in an app page: use the [Card blocks](https://web.dev.reui.io/blocks/application/card.md)
- A sign in or sign up page with a password, a magic link or social provider buttons: use the [Auth blocks](https://web.dev.reui.io/blocks/application/auth.md)

### Agent notes

- The headline and every action label are written inline in `Cta` in components/cta.tsx, never in a data file; rewrite them there
- No action is wired: every `href` is a placeholder hash and no email form reaches a backend; connect real routes and a submit handler

Every ReUI item has a twin like this one; the index is https://web.dev.reui.io/llms.txt. Agents with the ReUI MCP (https://web.dev.reui.io/docs/mcp) get the same guidance from the getters named above.