# Alert

> A message in the page: note, success, warning or error, told apart by the icon, not by color. The icon draws itself, a dismissed alert folds away and an error unfolds its log.

Feedback & loading · alert, callout, message, error · HTML, CSS, vanilla JS · no dependencies · updated 2026-10-21
Demo: https://kodza.dev/components/alert/

## Files

The code below, served as files: byte for byte what the Kodza site copies (the CSS includes its theme guard).

- [`kodza-alert.css`](https://kodza.dev/registry/alert/kodza-alert.css) · 15.1 KB
- [`kodza-alert.js`](https://kodza.dev/registry/alert/kodza-alert.js) · 7.5 KB
- [`kodza-alert.html`](https://kodza.dev/registry/alert/kodza-alert.html) · 2.7 KB · the markup, to adapt and paste into your page

**Can you run shell commands? Download the CSS and the JS, don't retype them.** Retyping costs thousands of tokens and can drop or change lines of the CSS. Put the files where your stack expects them (Use it says where: change the `-o` paths):

```bash
curl -fsSL --create-dirs -o kodza/kodza-alert.css https://kodza.dev/registry/alert/kodza-alert.css
curl -fsSL --create-dirs -o kodza/kodza-alert.js https://kodza.dev/registry/alert/kodza-alert.js
```

Then load the files from your page as Use it shows, instead of pasting the content. The HTML is the part you adapt (text, links, modifiers): paste it from the Code section. Copy the CSS and the JS from the Code section only if you can't run commands, exactly as they are. (Windows PowerShell: `curl.exe`.)

## API

- Root: `.kodza-alert`
- Variables (set them on the root element itself: it declares its own defaults):
  - `--kz-alert-bg: #ffffff`
  - `--kz-alert-fg: #0a0a0a`
  - `--kz-alert-muted: rgba(10, 10, 10, 0.64)`
  - `--kz-alert-line: rgba(10, 10, 10, 0.1)`
  - `--kz-alert-soft: rgba(10, 10, 10, 0.05)`
  - `--kz-alert-error-bg: #0a0a0a`
  - `--kz-alert-error-fg: #ffffff`
  - `--kz-alert-error-muted: rgba(255, 255, 255, 0.68)`
  - `--kz-alert-error-soft: rgba(255, 255, 255, 0.08)`
  - `--kz-alert-radius: 14px`
  - `--kz-alert-ease: cubic-bezier(0.22, 1, 0.36, 1)`
  - `--kz-alert-tone: var(--kz-alert-fg)`
  - `--kz-alert-tone-muted: var(--kz-alert-muted)`
  - `--kz-alert-tone-soft: var(--kz-alert-soft)`
- Modifiers: `.kodza-alert--error`, `.kodza-alert--success`, `.kodza-alert--warning`
- Events: `kodza:alert-close` (bubbling, from the root)
- Lifecycle: `kodza:init` / `kodza:destroy` on `document`, with `{ detail: { root } }` to target a container.

## Dark mode

The values Kodza uses on a dark background (`#0a0a0a`). For a page that follows the system theme, add them after the component's CSS:

```css
@media (prefers-color-scheme: dark) {
  .kodza-alert {
    --kz-alert-bg: #161616;
    --kz-alert-fg: #f2f2f0;
    --kz-alert-muted: rgba(242, 242, 240, 0.64);
    --kz-alert-line: rgba(255, 255, 255, 0.12);
    --kz-alert-soft: rgba(255, 255, 255, 0.07);
    --kz-alert-error-bg: #f2f2f0;
    --kz-alert-error-fg: #0a0a0a;
    --kz-alert-error-muted: rgba(10, 10, 10, 0.64);
    --kz-alert-error-soft: rgba(10, 10, 10, 0.07);
  }
}
```

A site with its own theme switch puts the same rules under its dark selector instead (`[data-theme="dark"] .kodza-alert { … }`); a single dark section, under that section's class.

## Use it

### Plain HTML page

- CSS: `kodza/kodza-alert.css` next to the page (the Files commands as they are), linked in `<head>`: `<link rel="stylesheet" href="kodza/kodza-alert.css">`. Without a shell, paste it in a `<style>` in `<head>` instead. It only touches `kodza-` classes.
- HTML: where the component goes. Paste it as many times as you need: instances never interfere.
- JS: `kodza/kodza-alert.js`, loaded with `<script src="kodza/kodza-alert.js" defer></script>` in `<head>`. Without a shell, paste it in a `<script>` before `</body>` (or in `<head>`: it waits for the page). One copy per page, whatever the number of instances.
- Restyle with the `--kz-…` variables, set on the component's root element itself (the root declares its own defaults, so a value on an ancestor is ignored), and with the modifiers / attributes listed under API.
- Font: it takes the page's own. The Kodza look is Geist: `<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600;700&family=Geist+Mono:wght@400;500&display=swap">`.
- Content added later (AJAX navigation, a SPA route, a builder preview): start it with `document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root: container } }))`; before removing it, the same call with `'kodza:destroy'` stops it and puts the original markup back.

### Claude artifact (claude.ai)

- Paste the CSS in a `<style>` and the JS in a `<script>` at the end, in the artifact itself: it loads stylesheets only from Google Fonts and scripts only from a few CDNs, so no `<link>` or `<script src>` to Kodza.
- Writing the artifact file with a shell? Insert the downloaded files (Files) with a command instead of retyping them: a line `KODZA-CSS` alone inside the `<style>`, `KODZA-JS` inside the `<script>`, then `sed -e '/^KODZA-CSS$/{r kodza/kodza-alert.css' -e 'd' -e '}' -e '/^KODZA-JS$/{r kodza/kodza-alert.js' -e 'd' -e '}' page.html > artifact.html`.
- Font: load Geist from Google Fonts (allowed): `<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600;700&family=Geist+Mono:wght@400;500&display=swap">`.
- Dark mode: the viewer sets `data-theme="dark"` or `"light"` on `<html>`, or nothing when it follows the system. Write the Dark mode rules twice: inside `@media (prefers-color-scheme: dark)` with `:root:not([data-theme="light"])` in front of each selector, and with `:root[data-theme="dark"]` in front of each selector.

### WordPress

- HTML: a **Custom HTML** block (or a pattern / template part). WordPress keeps this markup as it is only for users allowed to post unfiltered HTML (Administrators; Super Admins on multisite): for anyone else it strips tags such as `<svg>`, `<input>` or `<dialog>`, so add it from the theme (a pattern or template part) instead.
- CSS and JS: the downloaded files go in the theme, under `wp-content/themes/<your-theme>/kodza/` (the child theme if there is one), enqueued from its functions.php (or a code-snippets plugin):
  ```php
  add_action('wp_enqueue_scripts', function () {
    $dir = get_stylesheet_directory() . '/kodza/';
    $uri = get_stylesheet_directory_uri() . '/kodza/';
    wp_enqueue_style('kodza-alert', $uri . 'kodza-alert.css', [], filemtime($dir . 'kodza-alert.css'));
    wp_enqueue_script('kodza-alert', $uri . 'kodza-alert.js', [], filemtime($dir . 'kodza-alert.js'), true);
  });
  ```
  Scoped to `kodza-` classes, the CSS never touches the theme. One copy of the JS, whatever the number of blocks.
- No access to the theme files? The CSS can also go, as it is, in **Appearance → Customize → Additional CSS** (classic theme) or **Styles → Additional CSS** in the Site Editor (block theme).
- Theme with AJAX page transitions: fire `kodza:init` on the new content after each swap (and `kodza:destroy` on the old one).
- Performance plugin (WP Rocket, LiteSpeed Cache, Perfmatters…) with **Delay JavaScript execution** turned on: add `kodza` to the scripts it must not delay. Otherwise the component waits for the visitor's first scroll, tap or mouse move, and that first click can be lost.
- Colours: by default, match the theme's palette. After the component's CSS, point these variables at the theme's colours, on the component root, Kodza's value as the fallback:
  `.kodza-alert { --kz-alert-fg: var(TEXT, #0a0a0a); --kz-alert-bg: var(BACKGROUND, #ffffff); }`
  TEXT, BACKGROUND and ACCENT (the colour the theme fills its own buttons with) are the theme's own colour variables — block themes (theme.json, like Twenty Twenty-Five): `--wp--preset--color--contrast`, `--wp--preset--color--base`, `--wp--preset--color--contrast` (they fill their buttons with it; their accent-1… colours are decorative); Astra: `--ast-global-color-2`, `--ast-global-color-4`, `--ast-global-color-0`; Kadence: `--global-palette3`, `--global-palette9`, `--global-palette1`; GeneratePress: `--contrast`, `--base-3`, `--accent`; Blocksy: `--theme-palette-color-4`, `--theme-palette-color-8`, `--theme-palette-color-1`. Use only these names, and only if the site really has them (the theme's CSS, or Styles → Colors): the `--wp--preset--color--black`, `--white`, `--vivid-…` that WordPress adds everywhere are not the theme's palette. Another theme, or one without these variables (Hello Elementor, OceanWP): leave the variables alone, it keeps Kodza's monochrome; same when the developer asks for monochrome or the Kodza look. Leave the translucent greys (`rgba(10, 10, 10, …)`) as they are: they suit any light background. On a dark palette, set the other variables from Dark mode too.
- WordPress turns straight quotes and `--` into typographic ones in the text of a Custom HTML block (not inside `<code>` or `<pre>`).

#### With Elementor

- HTML: an **HTML** widget (Elementor shows it to administrators only). It keeps the code exactly as pasted, straight quotes included.
- CSS and JS: as above. Elementor's Site Settings → Theme Style styles every button, field, link and image of the page, components included; the theme guard at the end of the CSS keeps the component's buttons, fields and link colours as they are.
- The Elementor editor redraws each widget after the page has loaded: without the script below, the component stays still in the editor preview (the published page works). Add it once per site, in the footer like the component's script (`kodza/elementor-editor.js`, or a code-snippets plugin):

```js
// Kodza in the Elementor editor: the editor redraws each HTML widget after the page has loaded.
// Start Kodza in what it draws, stop it in what it replaces or removes. Once per site.
window.addEventListener('elementor/frontend/init', () => {
  if (!elementorFrontend.isEditMode()) return;
  class KodzaWidget extends elementorModules.frontend.handlers.Base {
    onInit() {
      super.onInit();
      this.kodza = [...this.$element[0].children];
      document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root: this.$element[0] } }));
    }
    onDestroy() {
      super.onDestroy();
      this.kodza.forEach((root) => document.dispatchEvent(new CustomEvent('kodza:destroy', { detail: { root } })));
    }
  }
  elementorFrontend.elementsHandler.attachHandler('html', KodzaWidget);
});
```

- No child theme: everything can go in the HTML widget instead, `<style>` with the CSS, the HTML, then `<script>` with the JS. It works on the page and in the editor without the script above. This one reads the page around it, and a script in the widget runs before the rest of the page exists: put its `<script>` in an HTML widget at the bottom of the page instead.

### Shopify

- Files: `assets/kodza-alert.css` and `assets/kodza-alert.js` (the Files commands with `-o assets/…`).
- In the section: `{{ 'kodza-alert.css' | asset_url | stylesheet_tag }}` and `<script src="{{ 'kodza-alert.js' | asset_url }}" defer></script>`, then the HTML.
- The theme editor re-renders sections: restart them with
  `document.addEventListener('shopify:section:load', (e) => document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root: e.target } })));`
  and the same with `shopify:section:unload` → `kodza:destroy`.

### React / Next.js

- Files, side by side (e.g. in `components/kodza/`): `Alert.tsx` (below), the CSS block under Code saved as `alert.css` and the JS block as `alert.js`, both as they are. The HTML block is already inside the component: skip it.
- Use it: `import { Alert } from '@/components/kodza/Alert';` then `<Alert />`. Props: `variant` ("error", "success", "warning", or several in an array), `vars` (the `--kz-…` variables listed under API, e.g. `vars={{ '--kz-alert-bg': … }}`), `onAlertClose` (the `kodza:alert-close` event), `className`, `style` and the other props of its `<div>` (`onClick`, `aria-…`).
- Next.js App Router: it is a Client Component already (`'use client'`). Pages Router: Next.js takes global CSS only in `pages/_app`, so move the `import './alert.css'` line there.
- Safe under StrictMode, client-side navigation and prop changes: when a prop changes, the `key` gives React a fresh element, `kodza:destroy` stops the script on the old one and `kodza:init` starts it on the new one.

```tsx
'use client';
// Kodza — Alert, for React. From https://kodza.dev/components/alert/
// Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license
// Next to this file: alert.css and alert.js, the component's CSS and JS from Kodza, as they are.
// Yours to edit: the markup is plain JSX below.
// The script changes this markup once React has rendered it (it adds layers, splits text, moves
// nodes), so React must not patch it afterwards. When a prop changes, the key gives React a fresh
// element: kodza:destroy stops the script on the old one, kodza:init starts it on the new one.
import { useRef, useEffect, type ComponentPropsWithoutRef, type ComponentRef, type CSSProperties } from 'react';
import './alert.css';

type Variant = "error" | "success" | "warning";

export type AlertProps = Omit<ComponentPropsWithoutRef<'div'>, "children" | "variant" | "vars" | "onAlertClose"> & {
  /** Modifier class(es): .kodza-alert--error, .kodza-alert--success, .kodza-alert--warning */
  variant?: Variant | Variant[];
  /** Settings, as CSS variables on the root */
  vars?: {
    /** default: #ffffff */
    "--kz-alert-bg"?: string | number;
    /** default: #0a0a0a */
    "--kz-alert-fg"?: string | number;
    /** default: rgba(10, 10, 10, 0.64) */
    "--kz-alert-muted"?: string | number;
    /** default: rgba(10, 10, 10, 0.1) */
    "--kz-alert-line"?: string | number;
    /** default: rgba(10, 10, 10, 0.05) */
    "--kz-alert-soft"?: string | number;
    /** default: #0a0a0a */
    "--kz-alert-error-bg"?: string | number;
    /** default: #ffffff */
    "--kz-alert-error-fg"?: string | number;
    /** default: rgba(255, 255, 255, 0.68) */
    "--kz-alert-error-muted"?: string | number;
    /** default: rgba(255, 255, 255, 0.08) */
    "--kz-alert-error-soft"?: string | number;
    /** default: 14px */
    "--kz-alert-radius"?: string | number;
    /** default: cubic-bezier(0.22, 1, 0.36, 1) */
    "--kz-alert-ease"?: string | number;
    /** default: var(--kz-alert-fg) */
    "--kz-alert-tone"?: string | number;
    /** default: var(--kz-alert-muted) */
    "--kz-alert-tone-muted"?: string | number;
    /** default: var(--kz-alert-soft) */
    "--kz-alert-tone-soft"?: string | number;
  };
  /** "kodza:alert-close", fired by the script (bubbles from the root) */
  onAlertClose?: (event: CustomEvent) => void;
  className?: string;
};

export function Alert({ variant, vars, onAlertClose, className, style, ...rest }: AlertProps) {
  const ref = useRef<ComponentRef<'div'>>(null);
  const classes = ["kodza-alert", ...([] as string[]).concat(variant ?? []).map((v) => `kodza-alert--${v}`), className].filter(Boolean).join(' ');
  // Everything the markup is made of: when it changes, React gets a fresh element (see the top)
  const key = JSON.stringify([classes, vars, style, rest]);

  // Starts the script on this element once React has rendered it, stops it when it goes
  useEffect(() => {
    const root = ref.current;
    let live = true;
    // @ts-ignore: a plain script, no types to find
    import('./alert.js').then(() => {
      if (live) document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root } }));
    });
    return () => {
      live = false;
      document.dispatchEvent(new CustomEvent('kodza:destroy', { detail: { root } }));
    };
  }, [key]);

  useEffect(() => {
    const root = ref.current;
    if (!root || !onAlertClose) return;
    const listener = (event: Event) => onAlertClose(event as CustomEvent);
    root.addEventListener("kodza:alert-close", listener);
    return () => root.removeEventListener("kodza:alert-close", listener);
  }, [onAlertClose, key]);

  return (
    <div role="note" key={key} {...rest} className={classes} style={{ ...vars, ...style } as CSSProperties} ref={ref}>
      <svg className="kodza-alert__icon" viewBox="0 0 20 20" aria-hidden="true">
        <circle cx="10" cy="10" r="8" pathLength="1" />
        <path d="M10 9v4.6M10 6.4v.1" pathLength="1" />
      </svg>
      <div className="kodza-alert__body">
        <p className="kodza-alert__title">Zero dependencies</p>
        <p className="kodza-alert__text">This component ships without a single package. Your bundle can relax.</p>
      </div>
      <button className="kodza-alert__close" type="button" aria-label="Dismiss">
        <svg viewBox="0 0 12 12" aria-hidden="true">
          <path d="M3 3l6 6M9 3 3 9" />
        </svg>
      </button>
    </div>
  );
}
```

## Code

```html
<div class="kodza-alert" role="note">
  <svg class="kodza-alert__icon" viewBox="0 0 20 20" aria-hidden="true"><circle cx="10" cy="10" r="8" pathLength="1" /><path d="M10 9v4.6M10 6.4v.1" pathLength="1" /></svg>
  <div class="kodza-alert__body">
    <p class="kodza-alert__title">Zero dependencies</p>
    <p class="kodza-alert__text">This component ships without a single package. Your bundle can relax.</p>
  </div>
  <button class="kodza-alert__close" type="button" aria-label="Dismiss"><svg viewBox="0 0 12 12" aria-hidden="true"><path d="M3 3l6 6M9 3 3 9" /></svg></button>
</div>

<div class="kodza-alert kodza-alert--success" role="note">
  <svg class="kodza-alert__icon" viewBox="0 0 20 20" aria-hidden="true"><circle cx="10" cy="10" r="8" pathLength="1" /><path d="M6.6 10.3l2.3 2.3 4.6-5" pathLength="1" /></svg>
  <div class="kodza-alert__body">
    <p class="kodza-alert__title">Deployed to production</p>
    <p class="kodza-alert__text">It is Friday, 5:58 pm. Bold. We respect it.</p>
  </div>
  <button class="kodza-alert__close" type="button" aria-label="Dismiss"><svg viewBox="0 0 12 12" aria-hidden="true"><path d="M3 3l6 6M9 3 3 9" /></svg></button>
</div>

<div class="kodza-alert kodza-alert--warning" role="note">
  <svg class="kodza-alert__icon" viewBox="0 0 20 20" aria-hidden="true"><path d="M10 2.6 18 16.6H2Z" pathLength="1" /><path d="M10 8.2v4M10 14.4v.1" pathLength="1" /></svg>
  <div class="kodza-alert__body">
    <p class="kodza-alert__title">Deprecated prop</p>
    <p class="kodza-alert__text"><code>size="huge"</code> goes away in v3. Switch to <code>size="lg"</code> before it switches you.</p>
  </div>
  <button class="kodza-alert__close" type="button" aria-label="Dismiss"><svg viewBox="0 0 12 12" aria-hidden="true"><path d="M3 3l6 6M9 3 3 9" /></svg></button>
</div>

<div class="kodza-alert kodza-alert--error" role="note">
  <svg class="kodza-alert__icon" viewBox="0 0 20 20" aria-hidden="true"><path d="M7 2.4h6l4.6 4.6v6L13 17.6H7L2.4 13V7Z" pathLength="1" /><path d="M10 6.4v4.6M10 13.6v.1" pathLength="1" /></svg>
  <div class="kodza-alert__body">
    <p class="kodza-alert__title">Build failed</p>
    <p class="kodza-alert__text">1 error, 0 regrets. The log knows more.</p>
    <button class="kodza-alert__more" type="button" aria-expanded="false"><span>Show log</span><span>Hide log</span></button>
    <div class="kodza-alert__details" hidden>
      <pre><code>src/button.js:42:7
  SyntaxError: Unexpected token '}'
    41 |   return label
  > 42 |   }}
       |    ^ one brace too many</code></pre>
    </div>
  </div>
  <button class="kodza-alert__close" type="button" aria-label="Dismiss"><svg viewBox="0 0 12 12" aria-hidden="true"><path d="M3 3l6 6M9 3 3 9" /></svg></button>
</div>
```

```css
/* Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license */
/* Kodza — Alert
   A message that sits in the page: a note (default), --success, --warning or --error.
   Monochrome: the kind is said by the icon's shape, and an error is inverted, ink on ink.
   The icon draws itself when the alert shows up; dismissed, it folds away and what follows
   slides up instead of jumping. An error can unfold its details (a log, a stack trace).
   Remove [hidden] to show one again, it unfolds the same way.
   Everything is tuned with the --kz-alert-* variables. */
.kodza-alert {
  --kz-alert-bg: #ffffff;
  --kz-alert-fg: #0a0a0a;
  --kz-alert-muted: rgba(10, 10, 10, 0.64);
  --kz-alert-line: rgba(10, 10, 10, 0.1);
  --kz-alert-soft: rgba(10, 10, 10, 0.05);
  --kz-alert-error-bg: #0a0a0a;
  --kz-alert-error-fg: #ffffff;
  --kz-alert-error-muted: rgba(255, 255, 255, 0.68);
  --kz-alert-error-soft: rgba(255, 255, 255, 0.08);
  --kz-alert-radius: 14px;
  --kz-alert-ease: cubic-bezier(0.22, 1, 0.36, 1);

  --kz-alert-tone: var(--kz-alert-fg);
  --kz-alert-tone-muted: var(--kz-alert-muted);
  --kz-alert-tone-soft: var(--kz-alert-soft);

  display: grid;
  box-sizing: border-box;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  padding: 16px 14px 16px 18px;
  border-radius: var(--kz-alert-radius);
  background: var(--kz-alert-bg);
  box-shadow: inset 0 0 0 1px var(--kz-alert-line);
  color: var(--kz-alert-tone);
  font-size: 14px;
  line-height: 1.5;
}

.kodza-alert[hidden] {
  display: none;
}

.kodza-alert--error {
  --kz-alert-tone: var(--kz-alert-error-fg);
  --kz-alert-tone-muted: var(--kz-alert-error-muted);
  --kz-alert-tone-soft: var(--kz-alert-error-soft);

  background: var(--kz-alert-error-bg);
  box-shadow: none;
}

/* The icon draws itself (circle or shape first, then its mark) */
.kodza-alert__icon {
  width: 20px;
  height: 20px;
  margin-top: 1px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.kodza-alert__icon > * {
  stroke-dasharray: 1;
  stroke-dashoffset: 0;
}

.kodza-alert.is-drawing .kodza-alert__icon > * {
  animation: kodza-alert-draw 0.6s cubic-bezier(0.65, 0, 0.35, 1) 0.4s backwards;
}

.kodza-alert.is-drawing .kodza-alert__icon > :nth-child(2) {
  animation-duration: 0.35s;
  animation-delay: 0.85s;
}

@keyframes kodza-alert-draw {
  from {
    stroke-dashoffset: 1;
  }
}

.kodza-alert__body {
  display: grid;
  justify-items: start;
  gap: 2px;
  min-width: 0;
}

.kodza-alert__title {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.kodza-alert__text {
  margin: 0;
  color: var(--kz-alert-tone-muted);
  text-wrap: pretty;
}

.kodza-alert code,
.kodza-alert pre {
  font-family: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.9em;
}

.kodza-alert__text code {
  padding: 1px 5px;
  border-radius: 5px;
  background: var(--kz-alert-tone-soft);
  color: var(--kz-alert-tone);
}

.kodza-alert__close {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  margin: -3px 0 0;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: none;
  color: var(--kz-alert-tone-muted);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.kodza-alert__close:hover {
  background: var(--kz-alert-tone-soft);
  color: var(--kz-alert-tone);
}

.kodza-alert__close svg {
  width: 12px;
  height: 12px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
}

.kodza-alert__close:focus-visible,
.kodza-alert__more:focus-visible {
  outline: 2px solid var(--kz-alert-tone);
  outline-offset: 2px;
}

/* Show log / Hide log: one cell, the words roll */
.kodza-alert__more {
  display: inline-grid;
  margin: 8px 0 0;
  padding: 0 0 1px;
  overflow: hidden;
  border: 0;
  border-bottom: 1px solid currentColor;
  background: none;
  color: var(--kz-alert-tone);
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
}

.kodza-alert__more > span {
  grid-area: 1 / 1;
  transition: transform 0.45s var(--kz-alert-ease), opacity 0.25s ease;
}

.kodza-alert__more > span:nth-child(2),
.kodza-alert__more[aria-expanded="true"] > span:first-child {
  opacity: 0;
  transform: translateY(-110%);
}

.kodza-alert__more > span:nth-child(2) {
  transform: translateY(110%);
}

.kodza-alert__more[aria-expanded="true"] > span:nth-child(2) {
  opacity: 1;
  transform: none;
}

.kodza-alert__details {
  justify-self: stretch;
  overflow: hidden;
}

.kodza-alert__details pre {
  margin: 12px 0 2px;
  padding: 14px 16px;
  overflow-x: auto;
  border-radius: 10px;
  background: var(--kz-alert-tone-soft);
  color: var(--kz-alert-tone);
  font-size: 12.5px;
  line-height: 1.6;
}

@media (prefers-reduced-motion: reduce) {
  .kodza-alert.is-drawing .kodza-alert__icon > * {
    animation: none;
  }

  .kodza-alert__close,
  .kodza-alert__more > span {
    transition-duration: 0.01ms !important;
  }
}

/* Theming example — on a dark background:
.dark-section .kodza-alert {
  --kz-alert-bg: #161616;
  --kz-alert-fg: #f2f2f0;
  --kz-alert-muted: rgba(242, 242, 240, 0.64);
  --kz-alert-line: rgba(255, 255, 255, 0.12);
  --kz-alert-soft: rgba(255, 255, 255, 0.07);
  --kz-alert-error-bg: #f2f2f0;
  --kz-alert-error-fg: #0a0a0a;
  --kz-alert-error-muted: rgba(10, 10, 10, 0.64);
  --kz-alert-error-soft: rgba(10, 10, 10, 0.07);
}
*/

/* kodza-guard ed786f33d355 — generated by Kodza, do not edit.
   Theme guard: keeps a site's own CSS (WordPress themes, Bootstrap, CSS resets…) off this
   component. :not(#_) is always true and weighs as much as an id, so these lines win over
   theme rules made of classes and tags. Customise the component through its --kz-* variables. */

/* What the browser gives, where the component sets it only in some states: at the lowest weight, so its own rules below put it back */

:where(.kodza-alert__close):not(#_),
:where(.kodza-alert__more):not(#_) {
  outline: revert;
  outline-offset: revert;
}

/* What the browser gives, on everything the component leaves to it */

.kodza-alert__icon:not(#_) {
  border: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  margin-right: revert;
  margin-bottom: revert;
  margin-left: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-alert__body:not(#_),
.kodza-alert__details:not(#_),
.kodza-alert__more span:where(:not([class*="kodza-"])):not(#_) {
  box-sizing: revert;
}

.kodza-alert__title:not(#_) {
  border: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-style: revert;
  line-height: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-alert__text:not(#_) {
  border: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-alert__close:not(#_) {
  text-decoration: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  box-shadow: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
  min-height: revert;
}

.kodza-alert__more:not(#_) {
  border-radius: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  box-shadow: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
  min-height: revert;
}

.kodza-alert__close svg:where(:not([class*="kodza-"])):not(#_) {
  border: revert;
  margin: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-alert__text code:where(:not([class*="kodza-"])):not(#_) {
  border: revert;
  margin: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-alert__details pre:where(:not([class*="kodza-"]):not(.kodza-alert__details [class*="kodza-"] *)):not(#_) {
  border: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  font-weight: revert;
  font-style: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
}

.kodza-alert__details code:where(:not([class*="kodza-"]):not(.kodza-alert__details [class*="kodza-"] *)):not(#_) {
  border: revert;
  margin: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-alert__icon:not(#_):where(:not([hidden])),
.kodza-alert__title:not(#_):where(:not([hidden])),
.kodza-alert__text:not(#_):where(:not([hidden])),
.kodza-alert__close svg:where(:not([class*="kodza-"])):not(#_):where(:not([hidden])),
.kodza-alert__text code:where(:not([class*="kodza-"])):not(#_):where(:not([hidden])),
.kodza-alert__details pre:where(:not([class*="kodza-"]):not(.kodza-alert__details [class*="kodza-"] *)):not(#_):where(:not([hidden])),
.kodza-alert__details code:where(:not([class*="kodza-"]):not(.kodza-alert__details [class*="kodza-"] *)):not(#_):where(:not([hidden])) {
  display: revert;
}

.kodza-alert__icon:not(#_):where([hidden]),
.kodza-alert__title:not(#_):where([hidden]),
.kodza-alert__text:not(#_):where([hidden]),
.kodza-alert__close svg:where(:not([class*="kodza-"])):not(#_):where([hidden]),
.kodza-alert__text code:where(:not([class*="kodza-"])):not(#_):where([hidden]),
.kodza-alert__details pre:where(:not([class*="kodza-"]):not(.kodza-alert__details [class*="kodza-"] *)):not(#_):where([hidden]),
.kodza-alert__details code:where(:not([class*="kodza-"]):not(.kodza-alert__details [class*="kodza-"] *)):not(#_):where([hidden]) {
  display: none;
}

/* The component's own rules, one step stronger: real buttons and fields, what it sets on tags themes style (links, lists, headings, images…), and the root width (a theme may narrow it, never widen it) */

.kodza-alert__icon:not(#_) {
  margin-top: 1px;
}

.kodza-alert__title:not(#_) {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.kodza-alert__text:not(#_) {
  margin: 0;
  color: var(--kz-alert-tone-muted);
}

.kodza-alert code:not(#_),
.kodza-alert pre:not(#_) {
  font-family: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.9em;
}

.kodza-alert__text code:not(#_) {
  padding: 1px 5px;
  border-radius: 5px;
  background: var(--kz-alert-tone-soft);
  color: var(--kz-alert-tone);
}

.kodza-alert__close:not(#_) {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  margin: -3px 0 0;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: none;
  color: var(--kz-alert-tone-muted);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.kodza-alert__close:hover:not(#_) {
  background: var(--kz-alert-tone-soft);
  color: var(--kz-alert-tone);
}

.kodza-alert__close:focus-visible:not(#_),
.kodza-alert__more:focus-visible:not(#_) {
  outline: 2px solid var(--kz-alert-tone);
  outline-offset: 2px;
}

.kodza-alert__more:not(#_) {
  display: inline-grid;
  margin: 8px 0 0;
  padding: 0 0 1px;
  overflow: hidden;
  border: 0;
  border-bottom: 1px solid currentColor;
  background: none;
  color: var(--kz-alert-tone);
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
}

.kodza-alert__details pre:not(#_) {
  margin: 12px 0 2px;
  padding: 14px 16px;
  border-radius: 10px;
  background: var(--kz-alert-tone-soft);
  color: var(--kz-alert-tone);
  font-size: 12.5px;
  line-height: 1.6;
}

@media (prefers-reduced-motion: reduce) {
  .kodza-alert__close:not(#_) {
    transition-duration: 0.01ms !important;
  }
}
```

```js
// Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license
// Kodza — Alert
// Draws the icon when an alert shows up, folds it away when dismissed (its height, its padding
// and the gap after it, so what follows slides up), and unfolds it the same way when [hidden]
// is removed. A dismissed alert sends "kodza:alert-close". The details of an error open and
// close at their real height.
(() => {
  const SELECTOR = '.kodza-alert';
  const reduceMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  const ease = 'cubic-bezier(0.22, 1, 0.36, 1)';
  const fold = 'cubic-bezier(0.65, 0, 0.35, 1)';
  let uid = 0;

  // The space between the alert and what follows it (or precedes it, for the last one)
  const space = (el) => {
    const next = el.nextElementSibling;
    const prev = el.previousElementSibling;
    if (next && !next.hidden) return { side: 'marginBottom', px: next.getBoundingClientRect().top - el.getBoundingClientRect().bottom };
    if (prev && !prev.hidden) return { side: 'marginTop', px: el.getBoundingClientRect().top - prev.getBoundingClientRect().bottom };
    return { side: 'marginBottom', px: 0 };
  };

  const draw = (root) => {
    root.classList.remove('is-drawing');
    void root.offsetWidth;
    root.classList.add('is-drawing');
  };

  // One instance. Everything it starts is tied to `signal`, so kodza:destroy stops it all
  function mount(root, signal) {
    const close = root.querySelector('.kodza-alert__close');
    const more = root.querySelector('.kodza-alert__more');
    const details = root.querySelector('.kodza-alert__details');
    let busy = false;
    let keyboard = false;
    document.addEventListener('keydown', () => (keyboard = true), { capture: true, signal });
    document.addEventListener('pointerdown', () => (keyboard = false), { capture: true, signal });

    // The scale of a transformed parent, so the gap is read in the alert's own pixels
    const scale = () => root.getBoundingClientRect().height / root.offsetHeight || 1;

    const dismiss = () => {
      if (busy) return;
      busy = true;
      const hadFocus = root.contains(document.activeElement) && keyboard;
      const after = () => {
        if (signal.aborted) return;
        root.getAnimations().forEach((animation) => animation.cancel());
        busy = false;
        // Without it, the icon would play once on showing again, then once more when drawn
        root.classList.remove('is-drawing');
        root.hidden = true;
        root.dispatchEvent(new CustomEvent('kodza:alert-close', { bubbles: true }));
        // Focus goes on to whatever came next, not back to the top of the page
        if (hadFocus) {
          const focusables = [...document.querySelectorAll('a[href], button:not([disabled]), input, select, textarea, [tabindex]:not([tabindex="-1"])')];
          focusables.find((el) => root.compareDocumentPosition(el) & Node.DOCUMENT_POSITION_FOLLOWING && el.offsetParent)?.focus();
        }
      };
      if (reduceMotion) return after();
      const k = scale();
      const gap = space(root);
      const style = getComputedStyle(root);
      root.animate([
        { opacity: 1, transform: 'none', height: `${root.offsetHeight}px`, paddingTop: style.paddingTop, paddingBottom: style.paddingBottom, [gap.side]: '0px', overflow: 'hidden' },
        { opacity: 0, transform: 'translateX(14px)', offset: 0.35, height: `${root.offsetHeight}px`, paddingTop: style.paddingTop, paddingBottom: style.paddingBottom, [gap.side]: '0px', overflow: 'hidden' },
        { opacity: 0, transform: 'translateX(14px)', height: '0px', paddingTop: '0px', paddingBottom: '0px', [gap.side]: `${-gap.px / k}px`, overflow: 'hidden' },
      ], { duration: 620, easing: fold, fill: 'forwards' }).onfinish = after;
    };

    const unfold = () => {
      if (reduceMotion) return;
      const k = scale();
      const gap = space(root);
      const style = getComputedStyle(root);
      root.animate([
        { opacity: 0, transform: 'translateY(6px)', height: '0px', paddingTop: '0px', paddingBottom: '0px', [gap.side]: `${-gap.px / k}px`, overflow: 'hidden' },
        { opacity: 0, transform: 'translateY(6px)', offset: 0.5, height: `${root.offsetHeight}px`, paddingTop: style.paddingTop, paddingBottom: style.paddingBottom, [gap.side]: '0px', overflow: 'hidden' },
        { opacity: 1, transform: 'none', height: `${root.offsetHeight}px`, paddingTop: style.paddingTop, paddingBottom: style.paddingBottom, [gap.side]: '0px', overflow: 'hidden' },
      ], { duration: 760, easing: ease });
      // Drawn from the start, held empty (CSS delay) until the alert has come in
      draw(root);
    };

    close?.addEventListener('click', dismiss, { signal });
    const observer = new MutationObserver(() => !root.hidden && !busy && unfold());
    observer.observe(root, { attributes: true, attributeFilter: ['hidden'] });
    // A fold still playing on the root (held by fill: forwards) would outlive the restored markup
    signal.addEventListener('abort', () => {
      observer.disconnect();
      root.getAnimations().forEach((animation) => animation.cancel());
    });

    if (more && details) {
      details.id = details.id || `kodza-alert-details-${++uid}`;
      more.setAttribute('aria-controls', details.id);
      more.addEventListener('click', () => {
        const open = more.getAttribute('aria-expanded') !== 'true';
        more.setAttribute('aria-expanded', String(open));
        details.getAnimations().forEach((animation) => animation.cancel());
        const from = details.hidden ? 0 : details.offsetHeight;
        details.hidden = false;
        const to = open ? details.offsetHeight : 0;
        if (reduceMotion) return (details.hidden = !open);
        details.animate([
          { height: `${from}px`, opacity: open ? 0 : 1 },
          { height: `${to}px`, opacity: open ? 1 : 0 },
        ], { duration: open ? 520 : 420, easing: open ? ease : fold }).onfinish = () => (details.hidden = !open);
      }, { signal });
    }
  }

  // Kodza lifecycle, the same in every component: `kodza:init` starts the instances inside
  // event.detail.root (the whole page by default), `kodza:destroy` stops them and puts their
  // markup back. For themes and apps that swap content without a page load.
  const instances = new WeakMap();
  const find = (scope = document) => [scope, ...scope.querySelectorAll(SELECTOR)].filter((el) => el.matches?.(SELECTOR));
  const init = (scope) => find(scope).forEach((root) => {
    if (root.classList.contains('is-ready')) return; // already running, maybe from another copy of this script
    const controller = new AbortController();
    instances.set(root, { controller, html: root.innerHTML, attrs: [...root.attributes].map((a) => [a.name, a.value]) });
    mount(root, controller.signal);
    root.classList.add('is-ready');
  });
  const destroy = (scope) => find(scope).forEach((root) => {
    const instance = instances.get(root);
    if (!instance) return;
    instances.delete(root);
    instance.controller.abort();
    [...root.attributes].forEach((a) => root.removeAttribute(a.name));
    instance.attrs.forEach(([name, value]) => root.setAttribute(name, value));
    root.innerHTML = instance.html;
  });
  document.addEventListener('kodza:init', (event) => init(event.detail?.root));
  document.addEventListener('kodza:destroy', (event) => destroy(event.detail?.root));
  init();
  // Loaded in <head>, the script runs before the markup exists: once more when it is parsed
  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', () => init(), { once: true });
})();
```

Free to use, from Kodza (https://kodza.dev).