# Shimmer skeleton card

> A placeholder post with avatar, image and text lines, while a band of light sweeps across it.

- Category: [Loaders](https://library.aimran.es/components/loaders)
- Built with: HTML + CSS
- Live editor: https://library.aimran.es/blocks/css-skeleton
- Library: AIMRAN Library (https://library.aimran.es), free, no sign-up, by Aimran Oukham

## Where to use it

The shimmer effect, a soft band of light sliding across grey shapes, is what most people now associate with “content on its way”. This CSS skeleton loader is shaped like a social post, with author, image and text, so it fits a community feed, the article list of a news site or a recipe blog’s latest posts.

Because it is plain HTML and CSS, it works on static and server-rendered sites too, before any JavaScript runs. Keep the highlight color only slightly lighter than the base; a bright flash across every card gets tiring when a whole page is loading.

## Code

### HTML

```html
<div class="ul-sk"><div class="ul-sk-h"><i class="a"></i><div><i></i><i class="s"></i></div></div><i class="img"></i><i></i><i class="s"></i></div>
```

### CSS

```css
.ul-sk {
  --c1: #0071e3;
  --c2: #8ec5ff;
  --s: 72px;
  /* tamaño */
  --k: 1;
  /* velocidad */
  --bg: #f5f5f7;
}

.ul-sk {
  width: calc(var(--s) * 4.5);
  padding: calc(var(--s) / 4);
  border-radius: 18px;
  background: color-mix(in srgb,var(--c1) 5%,var(--bg));
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 8px 24px rgba(0,0,0,.06);
}

.ul-sk-h {
  display: flex;
  gap: 12px;
  align-items: center;
}

.ul-sk-h>div {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ul-sk i {
  display: block;
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(100deg,color-mix(in srgb,var(--c1) 12%,transparent) 40%,color-mix(in srgb,var(--c2) 35%,transparent) 50%,color-mix(in srgb,var(--c1) 12%,transparent) 60%);
  background-size: 300% 100%;
  animation: ul-sk calc(1.6s / var(--k)) ease-in-out infinite;
}

.ul-sk i.a {
  width: calc(var(--s) * .8);
  height: calc(var(--s) * .8);
  border-radius: 50%;
  flex: none;
}

.ul-sk i.s {
  width: 60%;
}

.ul-sk i.img {
  height: calc(var(--s) * 1.6);
  border-radius: 12px;
}

@keyframes ul-sk {
  from {
    background-position: 100% 0;
  }
  to {
    background-position: 0 0;
  }
}
```

### React

```tsx
import type { CSSProperties } from "react";

const css = `
.ul-sk {
  width: calc(var(--s) * 4.5);
  padding: calc(var(--s) / 4);
  border-radius: 18px;
  background: color-mix(in srgb,var(--c1) 5%,var(--bg));
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 8px 24px rgba(0,0,0,.06);
}

.ul-sk-h {
  display: flex;
  gap: 12px;
  align-items: center;
}

.ul-sk-h>div {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ul-sk i {
  display: block;
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(100deg,color-mix(in srgb,var(--c1) 12%,transparent) 40%,color-mix(in srgb,var(--c2) 35%,transparent) 50%,color-mix(in srgb,var(--c1) 12%,transparent) 60%);
  background-size: 300% 100%;
  animation: ul-sk calc(1.6s / var(--k)) ease-in-out infinite;
}

.ul-sk i.a {
  width: calc(var(--s) * .8);
  height: calc(var(--s) * .8);
  border-radius: 50%;
  flex: none;
}

.ul-sk i.s {
  width: 60%;
}

.ul-sk i.img {
  height: calc(var(--s) * 1.6);
  border-radius: 12px;
}

@keyframes ul-sk {
  from {
    background-position: 100% 0;
  }
  to {
    background-position: 0 0;
  }
}
`;

export default function LoaderSkeleton() {
  return (
    <>
      <style>{css}</style>
      <div
        style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "72px",
          "--k": "1",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <div className="ul-sk"><div className="ul-sk-h"><i className="a"></i><div><i></i><i className="s"></i></div></div><i className="img"></i><i></i><i className="s"></i></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 “Shimmer skeleton card” block (Loaders) from AIMRAN Library to my project.

## What it is
A placeholder post with avatar, image and text lines, while a band of light sweeps across it.

## Chosen settings
- Main color: #0071e3
- Secondary color: #8ec5ff
- Size: 72px (from 24 to 120px)
- Speed: 1x (from 0.5 to 2x)

## 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
import type { CSSProperties } from "react";

const css = `
.ul-sk {
  width: calc(var(--s) * 4.5);
  padding: calc(var(--s) / 4);
  border-radius: 18px;
  background: color-mix(in srgb,var(--c1) 5%,var(--bg));
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 8px 24px rgba(0,0,0,.06);
}

.ul-sk-h {
  display: flex;
  gap: 12px;
  align-items: center;
}

.ul-sk-h>div {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ul-sk i {
  display: block;
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(100deg,color-mix(in srgb,var(--c1) 12%,transparent) 40%,color-mix(in srgb,var(--c2) 35%,transparent) 50%,color-mix(in srgb,var(--c1) 12%,transparent) 60%);
  background-size: 300% 100%;
  animation: ul-sk calc(1.6s / var(--k)) ease-in-out infinite;
}

.ul-sk i.a {
  width: calc(var(--s) * .8);
  height: calc(var(--s) * .8);
  border-radius: 50%;
  flex: none;
}

.ul-sk i.s {
  width: 60%;
}

.ul-sk i.img {
  height: calc(var(--s) * 1.6);
  border-radius: 12px;
}

@keyframes ul-sk {
  from {
    background-position: 100% 0;
  }
  to {
    background-position: 0 0;
  }
}
`;

export default function LoaderSkeleton() {
  return (
    <>
      <style>{css}</style>
      <div
        style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "72px",
          "--k": "1",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <div className="ul-sk"><div className="ul-sk-h"><i className="a"></i><div><i></i><i className="s"></i></div></div><i className="img"></i><i></i><i className="s"></i></div>
      </div>
    </>
  );
}
```

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