# Split Panel
[component-header:sl-split-panel]
Split panels display two adjacent panels, allowing the user to reposition them.
```html preview
Start
End
```
```jsx react
import { SlSplitPanel } from '@shoelace-style/shoelace/dist/react';
const App = () => (
Start
End
);
```
## Examples
### Initial Position
To set the initial position, use the `position` attribute. If no position is provided, it will default to 50% of the available space.
```html preview
Start
End
```
### Initial Position in Pixels
To set the initial position in pixels instead of a percentage, use the `position-in-pixels` attribute.
```html preview
Start
End
```
```jsx react
import { SlSplitPanel } from '@shoelace-style/shoelace/dist/react';
const App = () => (
Start
End
);
```
### Vertical
Add the `vertical` attribute to render the split panel in a vertical orientation where the start and end panels are stacked. You also need to set a height when using the vertical orientation.
```html preview
Start
End
```
```jsx react
import { SlSplitPanel } from '@shoelace-style/shoelace/dist/react';
const App = () => (
Start
End
);
```
### Snapping
To snap panels at specific positions while dragging, add the `snap` attribute with one or more space-separated values. Values must be in pixels or percentages. For example, to snap the panel at `100px` and `50%`, use `snap="100px 50%"`. You can also customize how close the divider must be before snapping with the `snap-threshold` attribute.
```html preview
```
```jsx react
import { SlSplitPanel } from '@shoelace-style/shoelace/dist/react';
const css = `
.split-panel-snapping {
position: relative;
}
.split-panel-snapping-dots::before,
.split-panel-snapping-dots::after {
content: '';
position: absolute;
bottom: -12px;
width: 6px;
height: 6px;
border-radius: 50%;
background: var(--sl-color-neutral-400);
transform: translateX(-3px);
}
.split-panel-snapping-dots::before {
left: 100px;
}
.split-panel-snapping-dots::after {
left: 50%;
}
`;
const App = () => (
<>
);
```
### Disabled
Add the `disabled` attribute to prevent the divider from being repositioned.
```html preview
Start
End
```
```jsx react
import { SlSplitPanel } from '@shoelace-style/shoelace/dist/react';
const App = () => (
Start
End
);
```
### Setting the Primary Panel
By default, both panels will grow or shrink proportionally when the host element is resized. If a primary panel is designated, it will maintain its size and the secondary panel will grow or shrink to fit the remaining space. You can set the primary panel to `start` or `end` using the `primary` attribute.
Try resizing the example below with each option and notice how the panels respond.
```html preview
```
```jsx react
import { useState } from 'react';
import { SlSplitPanel, SlSelect, SlMenuItem } from '@shoelace-style/shoelace/dist/react';
const App = () => {
const [primary, setPrimary] = useState('');
return (
<>
Start
End
setPrimary(event.target.value)}
>
None
Start
End
);
};
```
### Min & Max
To set a minimum or maximum size of the primary panel, use the `--min` and `--max` custom properties. Since the secondary panel is flexible, size constraints can only be applied to the primary panel. If no primary panel is designated, these constraints will be applied to the `start` panel.
This examples demonstrates how you can ensure both panels are at least 150px using `--min`, `--max`, and the `calc()` function.
```html preview
Start
End
```
```jsx react
import { SlSplitPanel } from '@shoelace-style/shoelace/dist/react';
const App = () => (
Start
End
);
```
### Nested Split Panels
Create complex layouts that can be repositioned independently by nesting split panels.
```html preview
Start
```
```jsx react
import { SlSplitPanel } from '@shoelace-style/shoelace/dist/react';
const App = () => (
Start
);
```
### Customizing the Divider
You can target the `divider` part to apply CSS properties to the divider. To add a handle, slot an icon or another element into the `handle` slot. When customizing the divider, make sure to think about focus styles for keyboard users.
```html preview
Start
End
```
```jsx react
import { SlSplitPanel, SlIcon } from '@shoelace-style/shoelace/dist/react';
const App = () => (
Start
End
);
```
Here's a more elaborate example that changes the divider's color and width and adds a styled handle.
```html preview
```
```jsx react
import { SlSplitPanel, SlIcon } from '@shoelace-style/shoelace/dist/react';
const css = `
.split-panel-handle sl-split-panel {
--divider-width: 2px;
}
.split-panel-handle sl-split-panel::part(divider) {
background-color: var(--sl-color-pink-600);
}
.split-panel-handle sl-icon {
position: absolute;
border-radius: var(--sl-border-radius-small);
background: var(--sl-color-pink-600);
color: var(--sl-color-neutral-0);
padding: .5rem .125rem;
}
.split-panel-handle sl-split-panel::part(divider):focus-visible {
background-color: var(--sl-color-primary-600);
}
.split-panel-handle sl-split-panel:focus-within sl-icon {
background-color: var(--sl-color-primary-600);
color: var(--sl-color-neutral-0);
}
`;
const App = () => (
<>
);
```
[component-metadata:sl-split-panel]