# Stacked toasts

> Each new notification lands on top of the pile while older ones shrink back, with four on screen at most.

- Category: [Toasts](https://library.aimran.es/components/toasts)
- Built with: HTML + CSS
- Live editor: https://library.aimran.es/blocks/uv-toast-stack
- Library: AIMRAN Library (https://library.aimran.es), free, no sign-up, by Aimran Oukham

## Where to use it

For moments when notifications arrive in bursts. Think of the order screen of a busy restaurant on a Friday night, or the dashboard of an online store during a sale: every new order lands on top and the previous ones step back without disappearing. Stacked toast notifications, in the style Sonner made popular in React apps.

The pile keeps the four latest and drops the oldest, so do not use it for anything people must not miss. Group repeats: “3 new orders” beats three identical cards. And add a way to clear them all once the rush is over.

## Code

### HTML

```html
<div class="uv-zstack"><button class="fire">Add notification</button><div class="pile"><div class="toast"><i>✦</i><span><b>Recent activity</b><small>The project was updated.</small></span></div></div></div>
```

### CSS

```css
.uv-zstack {
  --c1: #0071e3;
  --c2: #8ec5ff;
  --s: 16px;
  /* tamaño */
  --k: 1;
  /* velocidad */
  --fg: #1d1d1f;
  /* texto */
  --bg: #f5f5f7;
  /* fondo */
}

.uv-zstack {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  position: relative;
  width: 20em;
  height: 14em;
  font-size: var(--s);
}

.uv-zstack>.fire {
  position: absolute;
  left: 50%;
  top: 50%;
  translate: -50% -50%;
  padding: .8em 1.25em;
  border: 0;
  border-radius: 999px;
  font: inherit;
  font-weight: 600;
  color: #fff;
  background: var(--c1);
  cursor: pointer;
  transition: transform calc(0.25s / var(--k)) cubic-bezier(.34,1.56,.64,1);
  top: 35%;
}

.uv-zstack .pile {
  position: absolute;
  left: 50%;
  bottom: .3em;
  width: 18em;
  translate: -50% 0;
}

.uv-zstack .toast {
  position: absolute;
  z-index: 2;
  left: 50%;
  bottom: .5em;
  display: flex;
  align-items: center;
  gap: .75em;
  width: 18em;
  padding: .85em;
  border-radius: 1em;
  color: var(--fg);
  background: var(--bg);
  box-shadow: inset 0 0 0 1px color-mix(in srgb,var(--fg) 10%,transparent),0 18px 45px rgba(0,0,0,.18);
  opacity: 0;
  pointer-events: none;
  position: relative;
  left: auto;
  bottom: auto;
  width: 100%;
  margin-top: -2.5em;
  transform: scale(calc(1 - var(--i,0)*.04)) translateY(calc(var(--i,0)*-.45em));
  transform-origin: bottom;
  opacity: 1;
  pointer-events: auto;
  animation: uv-zstack calc(0.5s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-zstack .toast i {
  display: grid;
  place-items: center;
  width: 2em;
  height: 2em;
  border-radius: .65em;
  font-style: normal;
  color: #fff;
  background: var(--c1);
}

.uv-zstack .toast span {
  display: grid;
  gap: .1em;
}

.uv-zstack small {
  opacity: .5;
}

@keyframes uv-zstack {
  from {
    opacity: 0;
    transform: translateY(-3em) scale(.85);
  }
}
```

### JavaScript

```js
document.querySelectorAll(".uv-zstack").forEach(el => {
  const b=el.querySelector(".fire"),p=el.querySelector(".pile"),base=p.innerHTML;let n=1;b.addEventListener("click",()=>{n++;p.insertAdjacentHTML("afterbegin",base.replace("Recent activity","Notification "+n));Array.from(p.children).forEach((x,i)=>x.style.setProperty("--i",String(Math.min(i,3))));if(p.children.length>4)p.lastElementChild.remove()})
});
```

### React

```tsx
// @ts-nocheck: setup() es JavaScript del DOM sin tipos, el mismo de la pestaña JS.
import { useEffect, useRef, type CSSProperties } from "react";

const css = `
.uv-zstack {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  position: relative;
  width: 20em;
  height: 14em;
  font-size: var(--s);
}

.uv-zstack>.fire {
  position: absolute;
  left: 50%;
  top: 50%;
  translate: -50% -50%;
  padding: .8em 1.25em;
  border: 0;
  border-radius: 999px;
  font: inherit;
  font-weight: 600;
  color: #fff;
  background: var(--c1);
  cursor: pointer;
  transition: transform calc(0.25s / var(--k)) cubic-bezier(.34,1.56,.64,1);
  top: 35%;
}

.uv-zstack .pile {
  position: absolute;
  left: 50%;
  bottom: .3em;
  width: 18em;
  translate: -50% 0;
}

.uv-zstack .toast {
  position: absolute;
  z-index: 2;
  left: 50%;
  bottom: .5em;
  display: flex;
  align-items: center;
  gap: .75em;
  width: 18em;
  padding: .85em;
  border-radius: 1em;
  color: var(--fg);
  background: var(--bg);
  box-shadow: inset 0 0 0 1px color-mix(in srgb,var(--fg) 10%,transparent),0 18px 45px rgba(0,0,0,.18);
  opacity: 0;
  pointer-events: none;
  position: relative;
  left: auto;
  bottom: auto;
  width: 100%;
  margin-top: -2.5em;
  transform: scale(calc(1 - var(--i,0)*.04)) translateY(calc(var(--i,0)*-.45em));
  transform-origin: bottom;
  opacity: 1;
  pointer-events: auto;
  animation: uv-zstack calc(0.5s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-zstack .toast i {
  display: grid;
  place-items: center;
  width: 2em;
  height: 2em;
  border-radius: .65em;
  font-style: normal;
  color: #fff;
  background: var(--c1);
}

.uv-zstack .toast span {
  display: grid;
  gap: .1em;
}

.uv-zstack small {
  opacity: .5;
}

@keyframes uv-zstack {
  from {
    opacity: 0;
    transform: translateY(-3em) scale(.85);
  }
}
`;

// Interacción en JavaScript del DOM: la misma que en la pestaña JS.
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function setup(el: any) {
  const b=el.querySelector(".fire"),p=el.querySelector(".pile"),base=p.innerHTML;let n=1;b.addEventListener("click",()=>{n++;p.insertAdjacentHTML("afterbegin",base.replace("Recent activity","Notification "+n));Array.from(p.children).forEach((x,i)=>x.style.setProperty("--i",String(Math.min(i,3))));if(p.children.length>4)p.lastElementChild.remove()})
}

export default function ToastStack() {
  const ref = useRef<HTMLDivElement>(null);

  useEffect(() => {
    const el = ref.current?.firstElementChild;
    return el ? setup(el) : undefined;
  }, []);

  return (
    <>
      <style>{css}</style>
      <div
        ref={ref} style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <div className="uv-zstack"><button className="fire">Add notification</button><div className="pile"><div className="toast"><i>✦</i><span><b>Recent activity</b><small>The project was updated.</small></span></div></div></div>
      </div>
    </>
  );
}
```

## Prompt for AI assistants

Paste this into ChatGPT, Claude, Cursor, v0 or Lovable to adapt the block to your stack (Tailwind, Vue, Svelte…):

````text
I want to add the “Stacked toasts” block (Toasts) from AIMRAN Library to my project.

## What it is
Each new notification lands on top of the pile while older ones shrink back, with four on screen at most.

## Chosen settings
- Main color: #0071e3
- Secondary color: #8ec5ff
- Size: 16px (from 12 to 24px)
- Speed: 1x (from 0.5 to 2x)
- Text: "Recent activity"

## What I need
1. Add it to my project with the same look and animation as the reference code: same sizes, colours, radii, shadows, timings and easing.
2. It is built with plain HTML and CSS (the reference wraps it in a React component with its CSS). If my project uses something else (Vue, Svelte, Astro, plain HTML…), translate it without losing any behaviour. If I use Tailwind, turn the styles into classes; if not, keep the CSS in its own file.
3. Expose the settings above as props (or CSS variables) with those values as defaults.
4. Make it work well on phones: nothing that depends only on hover, touch targets of at least 44 px and no overflow on 320 px screens.
5. Make it look right in light and dark mode.
6. Keep it accessible: semantic HTML, roles and aria-* where needed, visible focus and keyboard support.
7. Respect prefers-reduced-motion: with reduced motion, no big animations but the same end result.

## Reference code
```tsx
// @ts-nocheck: setup() es JavaScript del DOM sin tipos, el mismo de la pestaña JS.
import { useEffect, useRef, type CSSProperties } from "react";

const css = `
.uv-zstack {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  position: relative;
  width: 20em;
  height: 14em;
  font-size: var(--s);
}

.uv-zstack>.fire {
  position: absolute;
  left: 50%;
  top: 50%;
  translate: -50% -50%;
  padding: .8em 1.25em;
  border: 0;
  border-radius: 999px;
  font: inherit;
  font-weight: 600;
  color: #fff;
  background: var(--c1);
  cursor: pointer;
  transition: transform calc(0.25s / var(--k)) cubic-bezier(.34,1.56,.64,1);
  top: 35%;
}

.uv-zstack .pile {
  position: absolute;
  left: 50%;
  bottom: .3em;
  width: 18em;
  translate: -50% 0;
}

.uv-zstack .toast {
  position: absolute;
  z-index: 2;
  left: 50%;
  bottom: .5em;
  display: flex;
  align-items: center;
  gap: .75em;
  width: 18em;
  padding: .85em;
  border-radius: 1em;
  color: var(--fg);
  background: var(--bg);
  box-shadow: inset 0 0 0 1px color-mix(in srgb,var(--fg) 10%,transparent),0 18px 45px rgba(0,0,0,.18);
  opacity: 0;
  pointer-events: none;
  position: relative;
  left: auto;
  bottom: auto;
  width: 100%;
  margin-top: -2.5em;
  transform: scale(calc(1 - var(--i,0)*.04)) translateY(calc(var(--i,0)*-.45em));
  transform-origin: bottom;
  opacity: 1;
  pointer-events: auto;
  animation: uv-zstack calc(0.5s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-zstack .toast i {
  display: grid;
  place-items: center;
  width: 2em;
  height: 2em;
  border-radius: .65em;
  font-style: normal;
  color: #fff;
  background: var(--c1);
}

.uv-zstack .toast span {
  display: grid;
  gap: .1em;
}

.uv-zstack small {
  opacity: .5;
}

@keyframes uv-zstack {
  from {
    opacity: 0;
    transform: translateY(-3em) scale(.85);
  }
}
`;

// Interacción en JavaScript del DOM: la misma que en la pestaña JS.
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function setup(el: any) {
  const b=el.querySelector(".fire"),p=el.querySelector(".pile"),base=p.innerHTML;let n=1;b.addEventListener("click",()=>{n++;p.insertAdjacentHTML("afterbegin",base.replace("Recent activity","Notification "+n));Array.from(p.children).forEach((x,i)=>x.style.setProperty("--i",String(Math.min(i,3))));if(p.children.length>4)p.lastElementChild.remove()})
}

export default function ToastStack() {
  const ref = useRef<HTMLDivElement>(null);

  useEffect(() => {
    const el = ref.current?.firstElementChild;
    return el ? setup(el) : undefined;
  }, []);

  return (
    <>
      <style>{css}</style>
      <div
        ref={ref} style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <div className="uv-zstack"><button className="fire">Add notification</button><div className="pile"><div className="toast"><i>✦</i><span><b>Recent activity</b><small>The project was updated.</small></span></div></div></div>
      </div>
    </>
  );
}
```

Give me the complete final code, ready to paste, and tell me in one line where to put it in my project.
````