useSingle

A composable that extends useSelection to enforce single-item selection. Automatically clears the previous selection before selecting a new item, ensuring only one item is selected at any time.

Usage

The useSingle composable is used when you have a collection of items but want to allow only one to be selected at any time.

import { useSingle } from '@vuetify/v0'

const single = useSingle()

// Register items first
single.register({ id: 'apple', value: 'Apple' })
single.register({ id: 'banana', value: 'Banana' })

// Select by ID
single.select('apple')
console.log(single.selectedId) // 'apple'
console.log(single.selectedValue) // 'Apple'

// Selecting a new item automatically clears the previous selection
single.select('banana')
console.log(single.selectedId) // 'banana' (replaces apple)

API

• Type

  export interface SingleTicket extends SelectionTicket {}
  
  export interface SingleContext<Z extends SingleTicket> extends SelectionContext<Z> {
    selectedId: ComputedRef<ID | undefined>
    selectedIndex: ComputedRef<number>
    selectedItem: ComputedRef<Z | undefined>
    selectedValue: ComputedRef<unknown>
  }
  
  export interface SingleOptions extends SelectionOptions {}

• Details

  • selectedId: The ID of the currently selected item (or undefined if none).
  • selectedIndex: The index position of the selected item in the collection (-1 if none).
  • selectedItem: The full object of the selected item (or undefined if none).
  • selectedValue: The value property of the selected item (or undefined if none).

selectedId

• Type

  ID | undefined

• Details Returns the ID of the currently selected item. undefined if no item is selected.

• Example

  const single = useSingle()
  single.register({ id: 'apple' })
  single.select('apple')
  console.log(single.selectedId) // 'apple'

selectedIndex

• Type

  number

• Details The zero-based index of the selected item in the collection. Returns -1 if no item is selected.

• Example

  const single = useSingle()
  single.register({ id: 'apple', value: 'Apple' })
  single.register({ id: 'banana', value: 'Banana' })
  single.select('apple')
  console.log(single.selectedIndex) // 0 (if apple is first in collection)
  

selectedItem

• Type

  Z | undefined

• Details The full object for the selected item, including all properties from the ticket.

• Example

  const single = useSingle()
  single.register({ id: 'apple', value: 'Apple', category: 'fruit' })
  single.register({ id: 'banana', value: 'Banana', category: 'fruit' })
  single.select('apple')
  console.log(single.selectedItem)
  // {
  //   id: 'apple',
  //   value: 'Apple',
  //   category: 'fruit',
  //   selected: true,
  //   ...
  // }

selectedValue

• Type

  unknown

• Details Returns only the value property of the selected item.

• Example

  const single = useSingle()
  single.register({ id: 'apple', value: 'Apple' })
  single.register({ id: 'banana', value: 'Banana' })
  single.select('banana')
  console.log(single.selectedValue) // 'Banana'