# Toast

> Notifications that stack like a deck and spread out on hover. Time runs out on a thin line, a swipe dismisses, and a loading toast turns into a success.

Overlays · toast, notification, stack, swipe · HTML, CSS, vanilla JS · no dependencies · updated 2026-10-16
Demo: https://kodza.dev/components/toast-notification/

## Files

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

- [`kodza-toast-notification.css`](https://kodza.dev/registry/toast-notification/kodza-toast-notification.css) · 10.1 KB
- [`kodza-toast-notification.js`](https://kodza.dev/registry/toast-notification/kodza-toast-notification.js) · 10.5 KB
- [`kodza-toast-notification.html`](https://kodza.dev/registry/toast-notification/kodza-toast-notification.html) · 0.7 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-toast-notification.css https://kodza.dev/registry/toast-notification/kodza-toast-notification.css
curl -fsSL --create-dirs -o kodza/kodza-toast-notification.js https://kodza.dev/registry/toast-notification/kodza-toast-notification.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-toast`
- Variables (set them on the root element itself: it declares its own defaults):
  - `--kz-toast-bg: #ffffff`
  - `--kz-toast-fg: #0a0a0a`
  - `--kz-toast-muted: rgba(10, 10, 10, 0.6)`
  - `--kz-toast-line: rgba(10, 10, 10, 0.1)`
  - `--kz-toast-soft: rgba(10, 10, 10, 0.06)`
  - `--kz-toast-ink: #0a0a0a`
  - `--kz-toast-on-ink: #ffffff`
  - `--kz-toast-shadow: 0 16px 40px -18px rgba(10, 10, 10, 0.35)`
  - `--kz-toast-width: 360px`
  - `--kz-toast-gap: 10px`
  - `--kz-toast-edge: 20px`
  - `--kz-toast-ease: cubic-bezier(0.22, 1, 0.36, 1)`
- Attributes:
  - `data-action` (e.g. `Undo`)
  - `data-then` (e.g. `Deployed. On a Tuesday, like adults.`)
  - `data-toast` (e.g. `Copied. Paste responsibly.`, `Deploying to production…`, `Component moved to the trash.`, `Build failed: 1 error, 0 regrets.`)
  - `data-type` (e.g. `success`, `loading`, `error`)
- Events: `kodza:toast-action` (bubbling, from the root)
- Hooks on the root element: `root.kodzaToast` (see the comment at the top of the JS)
- 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-toast {
    --kz-toast-bg: #1b1b1b;
    --kz-toast-fg: #f2f2f0;
    --kz-toast-muted: rgba(242, 242, 240, 0.62);
    --kz-toast-line: rgba(255, 255, 255, 0.12);
    --kz-toast-soft: rgba(255, 255, 255, 0.07);
    --kz-toast-ink: #f2f2f0;
    --kz-toast-on-ink: #0a0a0a;
    --kz-toast-shadow: 0 16px 40px -18px rgba(0, 0, 0, 0.8);
  }
}
```

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

## Use it

### Plain HTML page

- CSS: `kodza/kodza-toast-notification.css` next to the page (the Files commands as they are), linked in `<head>`: `<link rel="stylesheet" href="kodza/kodza-toast-notification.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-toast-notification.js`, loaded with `<script src="kodza/kodza-toast-notification.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$/{r kodza/kodza-toast-notification.css' -e 'd' -e '}' -e '/^KODZA-JS$/{r kodza/kodza-toast-notification.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-toast-notification', $uri . 'kodza-toast-notification.css', [], filemtime($dir . 'kodza-toast-notification.css'));
    wp_enqueue_script('kodza-toast-notification', $uri . 'kodza-toast-notification.js', [], filemtime($dir . 'kodza-toast-notification.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-toast { --kz-toast-fg: var(TEXT, #0a0a0a); --kz-toast-bg: var(BACKGROUND, #ffffff); --kz-toast-ink: var(ACCENT, #0a0a0a); --kz-toast-on-ink: 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.

### Shopify

- Files: `assets/kodza-toast-notification.css` and `assets/kodza-toast-notification.js` (the Files commands with `-o assets/…`).
- In the section: `{{ 'kodza-toast-notification.css' | asset_url | stylesheet_tag }}` and `<script src="{{ 'kodza-toast-notification.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/`): `Toast.tsx` (below), the CSS block under Code saved as `toast-notification.css` and the JS block as `toast-notification.js`, both as they are. The HTML block is already inside the component: skip it.
- Use it: `import { Toast } from '@/components/kodza/Toast';` then `<Toast />`. Props: `vars` (the `--kz-…` variables listed under API, e.g. `vars={{ '--kz-toast-bg': … }}`), `onToastAction` (the `kodza:toast-action` 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 './toast-notification.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 — Toast, for React. From https://kodza.dev/components/toast-notification/
// 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: toast-notification.css and toast-notification.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 './toast-notification.css';

export type ToastProps = Omit<ComponentPropsWithoutRef<'div'>, "children" | "vars" | "onToastAction"> & {
  /** Settings, as CSS variables on the root */
  vars?: {
    /** default: #ffffff */
    "--kz-toast-bg"?: string | number;
    /** default: #0a0a0a */
    "--kz-toast-fg"?: string | number;
    /** default: rgba(10, 10, 10, 0.6) */
    "--kz-toast-muted"?: string | number;
    /** default: rgba(10, 10, 10, 0.1) */
    "--kz-toast-line"?: string | number;
    /** default: rgba(10, 10, 10, 0.06) */
    "--kz-toast-soft"?: string | number;
    /** default: #0a0a0a */
    "--kz-toast-ink"?: string | number;
    /** default: #ffffff */
    "--kz-toast-on-ink"?: string | number;
    /** default: 0 16px 40px -18px rgba(10, 10, 10, 0.35) */
    "--kz-toast-shadow"?: string | number;
    /** default: 360px */
    "--kz-toast-width"?: string | number;
    /** default: 10px */
    "--kz-toast-gap"?: string | number;
    /** default: 20px */
    "--kz-toast-edge"?: string | number;
    /** default: cubic-bezier(0.22, 1, 0.36, 1) */
    "--kz-toast-ease"?: string | number;
  };
  /** "kodza:toast-action", fired by the script (bubbles from the root) */
  onToastAction?: (event: CustomEvent) => void;
  className?: string;
};

export function Toast({ vars, onToastAction, className, style, ...rest }: ToastProps) {
  const ref = useRef<ComponentRef<'div'>>(null);
  const classes = ["kodza-toast", 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('./toast-notification.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 || !onToastAction) return;
    const listener = (event: Event) => onToastAction(event as CustomEvent);
    root.addEventListener("kodza:toast-action", listener);
    return () => root.removeEventListener("kodza:toast-action", listener);
  }, [onToastAction, key]);

  return (
    <div key={key} {...rest} className={classes} style={{ ...vars, ...style } as CSSProperties} ref={ref}>
      <div className="kodza-toast__triggers">
        <button className="kodza-toast__trigger" type="button" data-toast="Copied. Paste responsibly." data-type="success">Copy code</button>
        {' '}
        <button className="kodza-toast__trigger" type="button" data-toast="Deploying to production…" data-type="loading" data-then="Deployed. On a Tuesday, like adults.">Deploy</button>
        {' '}
        <button className="kodza-toast__trigger" type="button" data-toast="Component moved to the trash." data-action="Undo">Delete</button>
        {' '}
        <button className="kodza-toast__trigger" type="button" data-toast="Build failed: 1 error, 0 regrets." data-type="error">Break the build</button>
      </div>
      <ol className="kodza-toast__stack" aria-label="Notifications" />
    </div>
  );
}
```

## Code

```html
<div class="kodza-toast">
  <div class="kodza-toast__triggers">
    <button class="kodza-toast__trigger" type="button" data-toast="Copied. Paste responsibly." data-type="success">Copy code</button>
    <button class="kodza-toast__trigger" type="button" data-toast="Deploying to production…" data-type="loading" data-then="Deployed. On a Tuesday, like adults.">Deploy</button>
    <button class="kodza-toast__trigger" type="button" data-toast="Component moved to the trash." data-action="Undo">Delete</button>
    <button class="kodza-toast__trigger" type="button" data-toast="Build failed: 1 error, 0 regrets." data-type="error">Break the build</button>
  </div>
  <ol class="kodza-toast__stack" aria-label="Notifications"></ol>
</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 — Toast
   Notifications that stack like a deck at the bottom right: the newest in front, the older
   ones peeking behind, smaller. Hover the deck and it spreads out; each one has a thin line
   that runs out with its time, paused while you read. Swipe one to the right to dismiss it.
   A loading toast turns into a success when its work is done, its words rolling. Monochrome:
   the kind is said by its icon. Trigger them with data-toast on a button, or from your code
   with root.kodzaToast({ text, type, action, onAction, duration, then, promise }).
   Everything is tuned with the --kz-toast-* variables. */
.kodza-toast {
  --kz-toast-bg: #ffffff;
  --kz-toast-fg: #0a0a0a;
  --kz-toast-muted: rgba(10, 10, 10, 0.6);
  --kz-toast-line: rgba(10, 10, 10, 0.1);
  --kz-toast-soft: rgba(10, 10, 10, 0.06);
  --kz-toast-ink: #0a0a0a;
  --kz-toast-on-ink: #ffffff;
  --kz-toast-shadow: 0 16px 40px -18px rgba(10, 10, 10, 0.35);
  --kz-toast-width: 360px;
  --kz-toast-gap: 10px;
  --kz-toast-edge: 20px;
  --kz-toast-ease: cubic-bezier(0.22, 1, 0.36, 1);

  color: var(--kz-toast-fg);
}

.kodza-toast__triggers {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.kodza-toast__trigger {
  height: 40px;
  padding: 0 16px;
  border: 0;
  border-radius: 999px;
  background: var(--kz-toast-bg);
  box-shadow: inset 0 0 0 1px var(--kz-toast-line);
  color: inherit;
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.kodza-toast__trigger:hover {
  box-shadow: inset 0 0 0 1px var(--kz-toast-muted);
}

.kodza-toast__trigger:active {
  transform: scale(0.97);
}

.kodza-toast__trigger:focus-visible,
.kodza-toast__action:focus-visible,
.kodza-toast__close:focus-visible {
  outline: 2px solid var(--kz-toast-fg);
  outline-offset: 2px;
}

/* The stack, fixed in the corner */
.kodza-toast__stack {
  position: fixed;
  right: var(--kz-toast-edge);
  bottom: var(--kz-toast-edge);
  z-index: 60;
  width: min(var(--kz-toast-width), calc(100vw - var(--kz-toast-edge) * 2));
  height: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* The pointer area of the spread deck, so it does not fold back while you move over the gaps */
.kodza-toast__stack.is-spread::before {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: var(--kz-toast-span, 0);
}

.kodza-toast__item {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 14px 14px 14px 16px;
  overflow: hidden;
  border-radius: 14px;
  background: var(--kz-toast-bg);
  box-shadow: 0 0 0 1px var(--kz-toast-line), var(--kz-toast-shadow);
  font-size: 14px;
  line-height: 1.4;
  touch-action: pan-y;
  transform-origin: 50% 0;
  /* Folded: each older toast a little higher and smaller. Spread: each above the next. */
  transform: translate(var(--kz-drag, 0px), calc(var(--kz-fold, 0px) * -1)) scale(calc(1 - var(--kz-lift, 0) * 0.05));
  opacity: var(--kz-alpha, 1);
  transition:
    transform 0.45s var(--kz-toast-ease),
    opacity 0.3s ease;
}

.kodza-toast__stack.is-spread .kodza-toast__item {
  transform: translate(var(--kz-drag, 0px), calc(var(--kz-offset, 0px) * -1));
  opacity: 1;
}

.kodza-toast__item.is-dragging {
  transition: none;
}

/* Arriving from below, leaving to the right */
.kodza-toast__item.is-entering {
  opacity: 0;
  transform: translateY(110%) scale(0.92);
  transition: none;
}

.kodza-toast__item.is-leaving {
  opacity: 0;
  transform: translate(calc(100% + var(--kz-toast-edge)), calc(var(--kz-fold, 0px) * -1));
  transition: transform 0.35s cubic-bezier(0.65, 0, 0.35, 1), opacity 0.3s ease;
  pointer-events: none;
}

.kodza-toast__icon {
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
}

.kodza-toast__icon svg {
  grid-area: 1 / 1;
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.kodza-toast__tick {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 0.45s var(--kz-toast-ease) 0.15s;
}

.kodza-toast__item[data-type="success"] .kodza-toast__tick {
  stroke-dashoffset: 0;
}

.kodza-toast__spinner {
  animation: kodza-toast-spin 0.8s linear infinite;
  transition: opacity 0.2s ease;
}

.kodza-toast__item:not([data-type="loading"]) .kodza-toast__spinner {
  opacity: 0;
  animation: none;
}

@keyframes kodza-toast-spin {
  to {
    transform: rotate(360deg);
  }
}

.kodza-toast__text {
  display: grid;
  overflow: hidden;
  font-weight: 500;
}

.kodza-toast__text > span {
  grid-area: 1 / 1;
}

.kodza-toast__end {
  display: flex;
  align-items: center;
  gap: 4px;
}

.kodza-toast__action {
  height: 30px;
  padding: 0 12px;
  border: 0;
  border-radius: 999px;
  background: var(--kz-toast-ink);
  color: var(--kz-toast-on-ink);
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
}

.kodza-toast__close {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: none;
  color: var(--kz-toast-muted);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.kodza-toast__close:hover {
  background: var(--kz-toast-soft);
  color: var(--kz-toast-fg);
}

.kodza-toast__close svg {
  width: 11px;
  height: 11px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
}

/* Time left: a thin line at the bottom that runs out, paused while the deck is spread */
.kodza-toast__time {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--kz-toast-soft);
}

.kodza-toast__time::after {
  content: "";
  display: block;
  height: 100%;
  background: var(--kz-toast-line);
  transform-origin: left;
  animation: kodza-toast-time var(--kz-time, 4s) linear forwards;
}

.kodza-toast__stack.is-spread .kodza-toast__time::after,
.kodza-toast__item[data-type="loading"] .kodza-toast__time::after {
  animation-play-state: paused;
}

@keyframes kodza-toast-time {
  from {
    transform: scaleX(1);
  }

  to {
    transform: scaleX(0);
  }
}

@media (max-width: 480px) {
  .kodza-toast {
    --kz-toast-edge: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kodza-toast__item,
  .kodza-toast__item.is-leaving,
  .kodza-toast__tick,
  .kodza-toast__trigger {
    transition-duration: 0.01ms !important;
  }

  .kodza-toast__spinner {
    animation: none;
  }
}

/* Theming example — on a dark background:
.dark-section .kodza-toast {
  --kz-toast-bg: #1b1b1b;
  --kz-toast-fg: #f2f2f0;
  --kz-toast-muted: rgba(242, 242, 240, 0.62);
  --kz-toast-line: rgba(255, 255, 255, 0.12);
  --kz-toast-soft: rgba(255, 255, 255, 0.07);
  --kz-toast-ink: #f2f2f0;
  --kz-toast-on-ink: #0a0a0a;
  --kz-toast-shadow: 0 16px 40px -18px rgba(0, 0, 0, 0.8);
}
*/

/* kodza-guard 2c3df5b63199 — 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-toast__trigger):not(#_) {
  outline: revert;
  outline-offset: revert;
}

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

.kodza-toast:not(#_),
.kodza-toast__triggers:not(#_) {
  box-sizing: revert;
}

.kodza-toast__trigger:not(#_) {
  margin: revert;
  text-decoration: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: 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-toast__stack:not(#_) {
  border: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  box-sizing: revert;
  float: 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-toast__trigger:not(#_):where(:not([hidden])),
.kodza-toast__stack:not(#_):where(:not([hidden])) {
  display: revert;
}

.kodza-toast__trigger:not(#_):where([hidden]),
.kodza-toast__stack:not(#_):where([hidden]) {
  display: none;
}

.kodza-toast__stack:not(#_)::before,
.kodza-toast__time:not(#_)::after {
  box-sizing: revert;
}

/* 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-toast__trigger:not(#_) {
  height: 40px;
  padding: 0 16px;
  border: 0;
  border-radius: 999px;
  background: var(--kz-toast-bg);
  box-shadow: inset 0 0 0 1px var(--kz-toast-line);
  color: inherit;
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.kodza-toast__trigger:hover:not(#_) {
  box-shadow: inset 0 0 0 1px var(--kz-toast-muted);
}

.kodza-toast__trigger:active:not(#_) {
  transform: scale(0.97);
}

.kodza-toast__trigger:focus-visible:not(#_) {
  outline: 2px solid var(--kz-toast-fg);
  outline-offset: 2px;
}

.kodza-toast__stack:not(#_) {
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (prefers-reduced-motion: reduce) {
  .kodza-toast__trigger: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 — Toast
// Keeps the deck: positions (folded or spread), timers that pause while the deck is spread or
// the tab is hidden, swipe to dismiss, actions, and loading toasts that turn into successes.
// root.kodzaToast({ text, type: "success" | "error" | "info" | "loading", action, onAction,
// duration, then, promise }) returns a function that closes it. data-toast on a button does the
// same, with data-type, data-action and data-then (a loading toast's text once done).
(() => {
  const SELECTOR = '.kodza-toast';
  const reduceMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  const ease = 'cubic-bezier(0.22, 1, 0.36, 1)';
  const ICONS = {
    success: '<svg viewBox="0 0 18 18"><circle cx="9" cy="9" r="7.5"/><path class="kodza-toast__tick" d="M5.8 9.2l2.2 2.1 4.2-4.6" pathLength="1"/></svg>',
    error: '<svg viewBox="0 0 18 18"><circle cx="9" cy="9" r="7.5"/><path d="M9 5.5v4.2M9 12.3v.1"/></svg>',
    info: '<svg viewBox="0 0 18 18"><circle cx="9" cy="9" r="7.5"/><path d="M9 8.3v4.2M9 5.7v.1"/></svg>',
    loading: '<svg class="kodza-toast__spinner" viewBox="0 0 18 18"><path d="M9 1.5A7.5 7.5 0 1 1 1.5 9"/></svg><svg viewBox="0 0 18 18"><circle cx="9" cy="9" r="7.5" opacity="0"/><path class="kodza-toast__tick" d="M5.8 9.2l2.2 2.1 4.2-4.6" pathLength="1"/></svg>',
  };
  const cross = '<svg viewBox="0 0 12 12" aria-hidden="true"><path d="M3 3l6 6M9 3 3 9"/></svg>';
  const MAX = 3;

  // One instance. Everything it starts is tied to `signal`, so kodza:destroy stops it all
  function mount(root, signal) {
    const stack = root.querySelector('.kodza-toast__stack');
    if (!stack) return;
    stack.setAttribute('aria-live', 'polite');
    const items = [];
    let spread = false;

    // Folded: lift = index from the front. Spread: offset = heights of the newer ones plus gaps.
    const layout = () => {
      const gap = parseFloat(getComputedStyle(root).getPropertyValue('--kz-toast-gap')) || 10;
      let offset = 0;
      const front = items[0]?.el.offsetHeight || 0;
      items.forEach((toast, i) => {
        const h = toast.el.offsetHeight;
        toast.el.style.setProperty('--kz-lift', i);
        // Folded, each older toast shows its top edge above the one in front, whatever its height
        toast.el.style.setProperty('--kz-fold', `${front - h + i * 10}px`);
        toast.el.style.setProperty('--kz-offset', `${offset}px`);
        toast.el.style.setProperty('--kz-alpha', i < MAX ? 1 : 0);
        toast.el.style.zIndex = String(100 - i);
        toast.el.inert = i >= MAX;
        offset += h + gap;
      });
      stack.style.setProperty('--kz-toast-span', `${offset}px`);
    };

    const roll = (box, text) => {
      const prev = box.lastElementChild;
      const span = Object.assign(document.createElement('span'), { textContent: text });
      box.append(span);
      if (!prev) return;
      if (reduceMotion) return prev.remove();
      const timing = { duration: 380, easing: ease };
      prev.animate([{ transform: 'none' }, { transform: 'translateY(-110%)' }], { ...timing, fill: 'forwards' }).finished.then(() => prev.remove());
      span.animate([{ transform: 'translateY(110%)' }, { transform: 'none' }], timing);
    };

    const dismiss = (toast) => {
      if (toast.gone) return;
      toast.gone = true;
      clearTimeout(toast.timer);
      toast.el.classList.add('is-leaving');
      items.splice(items.indexOf(toast), 1);
      layout();
      if (!items.length) {
        spread = false;
        stack.classList.remove('is-spread');
      }
      setTimeout(() => toast.el.remove(), reduceMotion ? 0 : 360);
    };

    // The timer only runs while the deck is folded and the tab visible
    const arm = (toast) => {
      clearTimeout(toast.timer);
      if (toast.type === 'loading' || spread || document.hidden) return;
      toast.started = performance.now();
      toast.timer = setTimeout(() => dismiss(toast), toast.left);
    };
    const pause = (toast) => {
      if (!toast.started) return;
      clearTimeout(toast.timer);
      toast.left = Math.max(400, toast.left - (performance.now() - toast.started));
      toast.started = 0;
    };

    const toast = ({ text = '', type = 'info', action, onAction, duration = 4000, then, promise } = {}) => {
      const el = document.createElement('li');
      el.className = 'kodza-toast__item is-entering';
      el.dataset.type = type;
      el.setAttribute('role', type === 'error' ? 'alert' : 'status');
      el.innerHTML = `<span class="kodza-toast__icon" aria-hidden="true">${ICONS[type] || ICONS.info}</span><span class="kodza-toast__text"></span><span class="kodza-toast__end"></span><span class="kodza-toast__time" aria-hidden="true"></span>`;
      el.style.setProperty('--kz-time', `${duration}ms`);
      const words = el.querySelector('.kodza-toast__text');
      roll(words, text);
      const end = el.querySelector('.kodza-toast__end');
      const item = { el, type, left: duration, started: 0, timer: 0, gone: false };
      if (action) {
        const button = Object.assign(document.createElement('button'), { type: 'button', className: 'kodza-toast__action', textContent: action });
        button.addEventListener('click', () => {
          onAction?.();
          root.dispatchEvent(new CustomEvent('kodza:toast-action', { detail: { action, text }, bubbles: true }));
          dismiss(item);
        }, { signal });
        end.append(button);
      }
      const close = Object.assign(document.createElement('button'), { type: 'button', className: 'kodza-toast__close', innerHTML: cross });
      close.setAttribute('aria-label', 'Dismiss');
      close.addEventListener('click', () => dismiss(item), { signal });
      end.append(close);

      stack.prepend(el);
      items.unshift(item);
      layout();
      // In from below, then the timer starts
      requestAnimationFrame(() => requestAnimationFrame(() => {
        el.classList.remove('is-entering');
        arm(item);
      }));
      while (items.length > MAX + 2) dismiss(items[items.length - 1]);

      // A loading toast becomes a success (or an error) when its work is done
      const finish = (ok, message) => {
        if (item.gone) return;
        item.type = ok ? 'success' : 'error';
        el.dataset.type = item.type;
        if (message) roll(words, message);
        el.querySelector('.kodza-toast__time').replaceWith(Object.assign(document.createElement('span'), { className: 'kodza-toast__time' }));
        item.left = duration;
        arm(item);
      };
      if (type === 'loading') {
        const work = promise || new Promise((resolve) => setTimeout(resolve, 1800));
        Promise.resolve(work).then(() => finish(true, then), (error) => finish(false, error?.message || 'That did not work.'));
      }

      // Swipe to the right to dismiss
      let start = null;
      el.addEventListener('pointerdown', (event) => {
        if (event.target.closest('button')) return;
        start = { x: event.clientX, time: performance.now() };
        el.setPointerCapture(event.pointerId);
        el.classList.add('is-dragging');
      }, { signal });
      el.addEventListener('pointermove', (event) => {
        if (!start) return;
        const dx = event.clientX - start.x;
        el.style.setProperty('--kz-drag', `${dx > 0 ? dx : dx / 4}px`);
      }, { signal });
      const release = (event) => {
        if (!start) return;
        const dx = event.clientX - start.x;
        const fast = dx / Math.max(1, performance.now() - start.time) > 0.5;
        start = null;
        el.classList.remove('is-dragging');
        if (dx > 90 || (fast && dx > 30)) return dismiss(item);
        el.style.setProperty('--kz-drag', '0px');
      };
      el.addEventListener('pointerup', release, { signal });
      el.addEventListener('pointercancel', release, { signal });
      return () => dismiss(item);
    };
    root.kodzaToast = toast;
    signal.addEventListener('abort', () => delete root.kodzaToast);

    // The deck spreads under the pointer (or the keyboard), timers pause
    const setSpread = (on) => {
      if (spread === on) return;
      spread = on;
      stack.classList.toggle('is-spread', on);
      items.forEach((item) => (on ? pause(item) : arm(item)));
    };
    stack.addEventListener('pointerenter', () => setSpread(true), { signal });
    stack.addEventListener('pointerleave', () => setSpread(false), { signal });
    stack.addEventListener('focusin', () => setSpread(true), { signal });
    stack.addEventListener('focusout', (event) => !stack.contains(event.relatedTarget) && setSpread(false), { signal });
    document.addEventListener('visibilitychange', () => items.forEach((item) => (document.hidden ? pause(item) : arm(item))), { signal });

    root.querySelectorAll('[data-toast]').forEach((button) => button.addEventListener('click', () => toast({
      text: button.dataset.toast,
      type: button.dataset.type || 'info',
      action: button.dataset.action,
      then: button.dataset.then,
    }), { 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).