Splitter

Alpha

A component that divides your layout into resizable sections.

Panel A

Panel B

Panel C

vue

<script setup lang="ts">
import { SplitterGroup, SplitterPanel, SplitterResizeHandle } from 'radix-vue'
</script>

<template>
  <div class="w-full h-64 px-8 text-green9 font-medium text-sm">
    <SplitterGroup
      id="splitter-group-1"
      direction="horizontal"
    >
      <SplitterPanel
        id="splitter-group-1-panel-1"
        :min-size="20"
        class="bg-white rounded-xl flex items-center justify-center"
      >
        Panel A
      </SplitterPanel>
      <SplitterResizeHandle
        id="splitter-group-1-resize-handle-1"
        class="w-2"
      />
      <SplitterPanel
        id="splitter-group-1-panel-2"
        :min-size="20"
      >
        <SplitterGroup
          id="splitter-group-2"
          direction="vertical"
        >
          <SplitterPanel
            id="splitter-group-2-panel-1"
            :min-size="20"
            class="bg-white rounded-xl flex items-center justify-center"
          >
            Panel B
          </SplitterPanel>
          <SplitterResizeHandle
            id="splitter-group-2-resize-handle-1"
            class="h-2"
          />
          <SplitterPanel
            id="splitter-group-2-panel-2"
            :min-size="20"
            class="bg-white rounded-xl flex items-center justify-center"
          >
            Panel C
          </SplitterPanel>
        </SplitterGroup>
      </SplitterPanel>
    </SplitterGroup>
  </div>
</template>

Credit

This component was heavily inspired by react-resizable-panels by Bryan Vaughn.

Features

Supports keyboard interaction.
Supports horizontal/vertical layout.
Supports nested layout.
Supports Right to Left direction.
Can resize across another panel.
Can be mounted conditionally.

Installation

Install the component from your command line.

$ npm add radix-vue

Anatomy

Import all parts and piece them together.

vue

<script setup>
import { SplitterGroup, SplitterPanel, SplitterResizeHandle } from 'radix-vue'
</script>

<template>
  <SplitterGroup>
    <SplitterPanel />
    <SplitterResizeHandle />
  </SplitterGroup>
</template>

API Reference

Group

Contains all the parts of a Splitter.

Prop	Default	Type
`as`	`'div'`	`AsTag \| Component` The element or component this component should render as. Can be overwrite by `asChild`
`asChild`		`boolean` Change the default rendered element for the one passed as a child, merging their props and behavior. Read our Composition guide for more details.
`autoSaveId`	`null`	`string \| null` Unique id used to auto-save group arrangement via `localStorage`.
`direction*`		`'vertical' \| 'horizontal'` The group orientation of splitter.
`id`		`string \| null` Group id; falls back to `useId` when not provided.
`keyboardResizeBy`	`10`	`number \| null` Step size when arrow key was pressed.
`storage`	`defaultStorage`	`PanelGroupStorage` Custom storage API; defaults to localStorage

Emit	Payload
`layout`	`[val: number[]]` Event handler called when group layout changes

Slots (default)	Payload
`layout`	`number[]` Current size of layout

Data Attribute	Value
`[data-orientation]`	`"vertical" \| "horizontal"`
`[data-state]`	`"collapsed" \| "expanded" \| "Present when collapsbile"`

Panel

A collapsible section.

Prop	Default	Type
`as`	`'div'`	`AsTag \| Component` The element or component this component should render as. Can be overwrite by `asChild`
`asChild`		`boolean` Change the default rendered element for the one passed as a child, merging their props and behavior. Read our Composition guide for more details.
`collapsedSize`		`number` The size of panel when it is collapsed.
`collapsible`		`boolean` Should panel collapse when resized beyond its `minSize`. When `true`, it will be collapsed to `collapsedSize`.
`defaultSize`		`number` Initial size of panel (numeric value between 1-100)
`id`		`string` Panel id (unique within group); falls back to `useId` when not provided
`maxSize`		`number` The maximum allowable size of panel (numeric value between 1-100); defaults to `100`
`minSize`		`number` The minimum allowable size of panel (numeric value between 1-100); defaults to `10`
`order`		`number` The order of panel within group; required for groups with conditionally rendered panels

Emit	Payload
`collapse`	`[]` Event handler called when panel is collapsed.
`expand`	`[]` Event handler called when panel is expanded.
`resize`	`[size: number, prevSize: number]` Event handler called when panel is resized; size parameter is a numeric value between 1-100.

Slots (default)	Payload
`isCollapsed`	`boolean` Is the panel collapsed
`isExpanded`	`boolean` Is the panel expanded

Methods	Type
`collapse`	`() => void` If panel is `collapsible`, collapse it fully.
`expand`	`() => void` If panel is currently collapsed, expand it to its most recent size.
`getSize`	`() => number` Gets the current size of the panel as a percentage (1 - 100).
`resize`	`(size: number) => void` Resize panel to the specified percentage (1 - 100).

Resize Handle

Handle that use for resizing.

Prop	Default	Type
`as`	`'div'`	`AsTag \| Component` The element or component this component should render as. Can be overwrite by `asChild`
`asChild`		`boolean` Change the default rendered element for the one passed as a child, merging their props and behavior. Read our Composition guide for more details.
`disabled`		`boolean` Disable drag handle
`hitAreaMargins`		`PointerHitAreaMargins` Allow this much margin when determining resizable handle hit detection
`id`		`string` Resize handle id (unique within group); falls back to `useId` when not provided
`tabindex`	`0`	`number` Tabindex for the handle

Emit	Payload
`dragging`	`[isDragging: boolean]` Event handler called when dragging the handler.

Data Attribute	Value
`[data-state]`	`"drag" \| "hover" \| "inactive"`
`[data-disabled]`	Present when disabled
`[data-orientation]`	`"vertical" \| "horizontal"`

Examples

Collapsible

Use the collapsible prop to allow the panel to collapse into collapsedSize when minSize is reached.

(collapsedSize and minSize props are required.)

vue

<template>
  <SplitterGroup>
    <SplitterPanel
      collapsible
      :collapsed-size="10"
      :min-size="35"
    >
      Panel A
    </SplitterPanel>
    <SplitterResizeHandle />
    <SplitterPanel>
      Panel B
    </SplitterPanel>
  </SplitterGroup>
</template>

Persist in localStorage

Use the autoSaveId prop to save the layout data into localStorage.

vue

<template>
  <SplitterGroup auto-save-id="any-id">
    …
  </SplitterGroup>
</template>

Persist layout with SSR

By default, Splitter uses localStorage to persist layouts. With server rendering, this can cause a flicker when the default layout (rendered on the server) is replaced with the persisted layout (in localStorage). The way to avoid this flicker is to also persist the layout with a cookie like so:

vue

<!-- with Nuxt -->
<script setup lang="ts">
const layout = useCookie<number[]>('splitter:layout')
</script>

<template>
  <SplitterGroup
    direction="horizontal"
    @layout="layout = $event"
  >
    <SplitterPanel :default-size="layout[0]">
      …
    </SplitterPanel>
    <SplitterResizeHandle />
    <SplitterPanel :default-size="layout[1]">
      …
    </SplitterPanel>
  </SplitterGroup>
</template>

Collapse/Expand programmatically

Sometimes panels need to resize or collapse/expand in response to user actions. SplitterPanel exposes the collapse and expand methods to achieve this.

vue

<script setup lang="ts">
const panelRef = ref<InstanceType<typeof SplitterPanel>>()
</script>

<template>
  <button
    @click="panelRef?.isCollapsed ? panelRef?.expand() : panelRef?.collapse() "
  >
    {{ panelRef?.isCollapsed ? 'Expand' : 'Collapse' }}
  </button>

  <SplitterGroup>
    <SplitterPanel
      ref="panelRef"
      collapsible
      :collapsed-size="10"
      :min-size="35"
    >
      …
    </SplitterPanel>
    <SplitterResizeHandle />
    <SplitterPanel>
      …
    </SplitterPanel>
  </SplitterGroup>
</template>

Custom handle

Customize the handle by passing any element as the slot.

vue

<template>
  <SplitterGroup>
    <SplitterPanel>
      …
    </SplitterPanel>
    <SplitterResizeHandle>
      <Icon icon="radix-icons-drag-handle-dots-2" />
    </SplitterResizeHandle>
    <SplitterPanel>
      …
    </SplitterPanel>
  </SplitterGroup>
</template>

SSR

Splitter component heavily relies on unique id, however for Vue<3.4 we don't have a reliable way of generating SSR-friendly id.

Thus, if you are using Nuxt or other SSR framework, you are required to manually add the id for all Splitter components. Alternatively, you can wrap the component with <ClientOnly>.

vue

<template>
  <SplitterGroup id="group-1">
    <SplitterPanel id="group-1-panel-1">
      …
    </SplitterPanel>
    <SplitterResizeHandle id="group-1-resize-1">
      <Icon icon="radix-icons-drag-handle-dots-2" />
    </SplitterResizeHandle>
    <SplitterPanel id="group-1-panel-2">
      …
    </SplitterPanel>
  </SplitterGroup>
</template>

Accessibility

Adheres to the Window Splitter WAI-ARIA design pattern.

Keyboard Interactions

Key	Description
`Enter`	If the primary pane is not collapsed, collapses the pane. If the pane is collapsed, restores the splitter to its previous position.
`ArrowDown`	Moves a horizontal splitter down.
`ArrowUp`	Moves a horizontal splitter up.
`ArrowRight`	Moves a vertical splitter to the right.
`ArrowLeft`	Moves a vertical splitter to the left.
`Home`	Moves splitter to the position that gives the primary pane its smallest allowed size.
`End`	Moves splitter to the position that gives the primary pane its largest allowed size.

Splitter ​

Features ​

Installation ​

Anatomy ​

API Reference ​

Group ​

Panel ​

Resize Handle ​

Examples ​

Collapsible ​

Persist in localStorage ​

Persist layout with SSR ​

Collapse/Expand programmatically ​

Custom handle ​

SSR ​

Accessibility ​

Keyboard Interactions ​