superset2/docs/developer_docs/components/ui/loading.mdx

---
title: Loading
sidebar_label: Loading
---

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import { StoryWithControls } from '../../../src/components/StorybookWrapper';

# Loading

The Loading component from Superset's UI library.

## Live Example

<StoryWithControls
  component="Loading"
  props={{
  size: "m",
  position: "normal",
  muted: false
}}
  controls={[
  {
    name: "size",
    label: "Size",
    type: "select",
    options: [
      "s",
      "m",
      "l"
    ],
    description: "Size of the spinner: s (40px), m (70px), or l (100px)."
  },
  {
    name: "position",
    label: "Position",
    type: "select",
    options: [
      "normal",
      "floating",
      "inline"
    ],
    description: "Position style: normal (inline flow), floating (overlay), or inline."
  },
  {
    name: "muted",
    label: "Muted",
    type: "boolean",
    description: "Whether to show a muted/subtle version of the spinner."
  }
]}
/>

## Try It

Edit the code below to experiment with the component:

```tsx live
function Demo() {
  return (
    <div>
      {['normal', 'floating', 'inline'].map(position => (
        <div
          key={position}
          style={{
            marginBottom: 40,
            padding: 20,
            border: '1px solid #eee',
            position: 'relative',
            minHeight: 80,
          }}
        >
          <h4 style={{ marginTop: 0 }}>{position}</h4>
          <Loading position={position} size="m" />
        </div>
      ))}
    </div>
  );
}
```

## Size and Opacity Showcase

```tsx live
function SizeShowcase() {
  const sizes = ['s', 'm', 'l'];
  return (
    <div style={{ padding: 20 }}>
      <div style={{ display: 'grid', gridTemplateColumns: 'repeat(4, 1fr)', gap: 20, alignItems: 'center' }}>
        <div><strong>Size</strong></div>
        <div><strong>Normal</strong></div>
        <div><strong>Muted</strong></div>
        <div><strong>Usage</strong></div>
        {sizes.map(size => (
          <React.Fragment key={size}>
            <div style={{ fontWeight: 'bold' }}>
              {size.toUpperCase()} ({size === 's' ? '40px' : size === 'm' ? '70px' : '100px'})
            </div>
            <div style={{ textAlign: 'center', padding: 10, border: '1px solid #eee' }}>
              <Loading size={size} position="normal" />
            </div>
            <div style={{ textAlign: 'center', padding: 10, border: '1px solid #eee' }}>
              <Loading size={size} muted position="normal" />
            </div>
            <div style={{ fontSize: 12, color: '#666' }}>
              {size === 's' && 'Filter bars, inline'}
              {size === 'm' && 'Explore pages'}
              {size === 'l' && 'Full page loading'}
            </div>
          </React.Fragment>
        ))}
      </div>
    </div>
  );
}
```

## Contextual Examples

```tsx live
function ContextualDemo() {
  return (
    <div style={{ padding: 20 }}>
      <h4>Filter Bar (size="s", muted)</h4>
      <div style={{ height: 40, backgroundColor: '#f5f5f5', display: 'flex', alignItems: 'center', padding: '0 10px', gap: 10, marginBottom: 30 }}>
        <span>Filter 1:</span>
        <Loading size="s" muted position="normal" />
        <span>Filter 2:</span>
        <Loading size="s" muted position="normal" />
      </div>

      <h4>Dashboard Grid (size="s", muted)</h4>
      <div style={{ display: 'grid', gridTemplateColumns: 'repeat(3, 1fr)', gap: 10, marginBottom: 30 }}>
        {[1, 2, 3].map(i => (
          <div key={i} style={{ height: 100, backgroundColor: '#fafafa', border: '1px solid #ddd', display: 'flex', alignItems: 'center', justifyContent: 'center' }}>
            <Loading size="s" muted position="normal" />
          </div>
        ))}
      </div>

      <h4>Main Loading (size="l")</h4>
      <div style={{ height: 200, display: 'flex', alignItems: 'center', justifyContent: 'center', border: '2px dashed #ccc' }}>
        <Loading size="l" position="normal" />
      </div>
    </div>
  );
}
```

## Props

| Prop | Type | Default | Description |
|------|------|---------|-------------|
| `size` | `string` | `"m"` | Size of the spinner: s (40px), m (70px), or l (100px). |
| `position` | `string` | `"normal"` | Position style: normal (inline flow), floating (overlay), or inline. |
| `muted` | `boolean` | `false` | Whether to show a muted/subtle version of the spinner. |

## Import

```tsx
import { Loading } from '@superset/components';
```

---

:::tip[Improve this page]
This documentation is auto-generated from the component's Storybook story.
Help improve it by [editing the story file](https://github.com/apache/superset/edit/master/superset-frontend/packages/superset-ui-core/src/components/Loading/Loading.stories.tsx).
:::