# 3D cube loader

> An isometric cube spinning on its axis, each face in a slightly different shade so it reads as solid.

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

## Where to use it

A 3D cube loader in pure CSS says “packages” and “building blocks” without a word. Use it on the tracking page of a shipping company, while a 3D product configurator prepares its model or during the upload step of a cloud storage app. The faces are shaded so it looks solid, with no images or libraries.

Choose a mid-tone main color: the side faces are darkened from it automatically, so a very dark color leaves no contrast. Make the second color lighter, since it paints the top and bottom and gives the cube its light.

## Code

### HTML

```html
<div class="ul-cube-w"><div class="ul-cube"><i></i><i></i><i></i><i></i><i></i><i></i></div></div>
```

### CSS

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

.ul-cube-w {
  perspective: calc(var(--s) * 8);
}

.ul-cube {
  position: relative;
  width: var(--s);
  height: var(--s);
  transform-style: preserve-3d;
  animation: ul-cube calc(3s / var(--k)) cubic-bezier(.65,0,.35,1) infinite;
}

.ul-cube i {
  position: absolute;
  inset: 0;
  border-radius: 8%;
  background: var(--c1);
}

.ul-cube i:nth-child(1) {
  transform: translateZ(calc(var(--s) / 2));
}

.ul-cube i:nth-child(2) {
  transform: rotateY(180deg) translateZ(calc(var(--s) / 2));
}

.ul-cube i:nth-child(3) {
  transform: rotateY(90deg) translateZ(calc(var(--s) / 2));
  background: color-mix(in srgb,var(--c1) 70%,#000);
}

.ul-cube i:nth-child(4) {
  transform: rotateY(-90deg) translateZ(calc(var(--s) / 2));
  background: color-mix(in srgb,var(--c1) 70%,#000);
}

.ul-cube i:nth-child(5) {
  transform: rotateX(90deg) translateZ(calc(var(--s) / 2));
  background: var(--c2);
}

.ul-cube i:nth-child(6) {
  transform: rotateX(-90deg) translateZ(calc(var(--s) / 2));
  background: var(--c2);
}

@keyframes ul-cube {
  0% {
    transform: rotateX(-30deg) rotateY(45deg);
  }
  50% {
    transform: rotateX(-30deg) rotateY(225deg);
  }
  100% {
    transform: rotateX(-30deg) rotateY(405deg);
  }
}
```

### React

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

const css = `
.ul-cube-w {
  perspective: calc(var(--s) * 8);
}

.ul-cube {
  position: relative;
  width: var(--s);
  height: var(--s);
  transform-style: preserve-3d;
  animation: ul-cube calc(3s / var(--k)) cubic-bezier(.65,0,.35,1) infinite;
}

.ul-cube i {
  position: absolute;
  inset: 0;
  border-radius: 8%;
  background: var(--c1);
}

.ul-cube i:nth-child(1) {
  transform: translateZ(calc(var(--s) / 2));
}

.ul-cube i:nth-child(2) {
  transform: rotateY(180deg) translateZ(calc(var(--s) / 2));
}

.ul-cube i:nth-child(3) {
  transform: rotateY(90deg) translateZ(calc(var(--s) / 2));
  background: color-mix(in srgb,var(--c1) 70%,#000);
}

.ul-cube i:nth-child(4) {
  transform: rotateY(-90deg) translateZ(calc(var(--s) / 2));
  background: color-mix(in srgb,var(--c1) 70%,#000);
}

.ul-cube i:nth-child(5) {
  transform: rotateX(90deg) translateZ(calc(var(--s) / 2));
  background: var(--c2);
}

.ul-cube i:nth-child(6) {
  transform: rotateX(-90deg) translateZ(calc(var(--s) / 2));
  background: var(--c2);
}

@keyframes ul-cube {
  0% {
    transform: rotateX(-30deg) rotateY(45deg);
  }
  50% {
    transform: rotateX(-30deg) rotateY(225deg);
  }
  100% {
    transform: rotateX(-30deg) rotateY(405deg);
  }
}
`;

export default function LoaderCube() {
  return (
    <>
      <style>{css}</style>
      <div
        style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "72px",
          "--k": "1",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <div className="ul-cube-w"><div className="ul-cube"><i></i><i></i><i></i><i></i><i></i><i></i></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 “3D cube loader” block (Loaders) from AIMRAN Library to my project.

## What it is
An isometric cube spinning on its axis, each face in a slightly different shade so it reads as solid.

## 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-cube-w {
  perspective: calc(var(--s) * 8);
}

.ul-cube {
  position: relative;
  width: var(--s);
  height: var(--s);
  transform-style: preserve-3d;
  animation: ul-cube calc(3s / var(--k)) cubic-bezier(.65,0,.35,1) infinite;
}

.ul-cube i {
  position: absolute;
  inset: 0;
  border-radius: 8%;
  background: var(--c1);
}

.ul-cube i:nth-child(1) {
  transform: translateZ(calc(var(--s) / 2));
}

.ul-cube i:nth-child(2) {
  transform: rotateY(180deg) translateZ(calc(var(--s) / 2));
}

.ul-cube i:nth-child(3) {
  transform: rotateY(90deg) translateZ(calc(var(--s) / 2));
  background: color-mix(in srgb,var(--c1) 70%,#000);
}

.ul-cube i:nth-child(4) {
  transform: rotateY(-90deg) translateZ(calc(var(--s) / 2));
  background: color-mix(in srgb,var(--c1) 70%,#000);
}

.ul-cube i:nth-child(5) {
  transform: rotateX(90deg) translateZ(calc(var(--s) / 2));
  background: var(--c2);
}

.ul-cube i:nth-child(6) {
  transform: rotateX(-90deg) translateZ(calc(var(--s) / 2));
  background: var(--c2);
}

@keyframes ul-cube {
  0% {
    transform: rotateX(-30deg) rotateY(45deg);
  }
  50% {
    transform: rotateX(-30deg) rotateY(225deg);
  }
  100% {
    transform: rotateX(-30deg) rotateY(405deg);
  }
}
`;

export default function LoaderCube() {
  return (
    <>
      <style>{css}</style>
      <div
        style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "72px",
          "--k": "1",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <div className="ul-cube-w"><div className="ul-cube"><i></i><i></i><i></i><i></i><i></i><i></i></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.
````