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Toggle Group

A toggle group is used to toggle either one option or multiple options.

Properties

Features

  • Fully managed keyboard navigation.
  • Supports horizontal and vertical orientation.
  • Support for multiple selection.

Installation

To use the toggle group machine in your project, run the following command in your command line:

npm install @zag-js/toggle-group @zag-js/vue
# or
yarn add @zag-js/toggle-group @zag-js/vue

This command will install the framework agnostic toggle group logic and the reactive utilities for your framework of choice.

Anatomy

To set up the toggle group correctly, you'll need to understand its anatomy and how we name its parts.

Each part includes a data-part attribute to help identify them in the DOM.

Usage

First, import the toggle group package into your project

import * as toggle from "@zag-js/toggle-group"

The toggle group package exports two key functions:

  • machine — The state machine logic for the toggle group widget as described in the WAI-ARIA spec.
  • connect — The function that translates the machine's state to JSX attributes and event handlers.

You'll need to provide a unique id to the useMachine hook. This is used to ensure that every part has a unique identifier.

Next, import the required hooks and functions for your framework and use the toggle group machine in your project 🔥

<script setup>
import * as toggle from "@zag-js/toggle-group"
import { normalizeProps, useMachine } from "@zag-js/vue";
import { computed } from "vue";

const [state, send] = useMachine(toggle.machine({ id: '1' }))
const api = computed(() => toggle.connect(state.value, send, normalizeProps))
</script>

<template>
  <div v-bind="api.rootProps">
    <button v-bind="api.getItemProps({ value: 'bold' })">B</button>
    <button v-bind="api.getItemProps({ value: 'italic' })">I</button>
    <button v-bind="api.getItemProps({ value: 'underline' })">U</button>
  </div>
</template>

Changing the orientation

By default, the toggle group is assumed to be horizontal. To change the orientation to vertical, set the orientation property in the machine's context to vertical.

const [state, send] = useMachine(
  toggle.machine({
    orientation: "vertical",
  }),
)

Listening for value changes

When the pressed toggle in the group changes, onValueChange callback is invoked.

const [state, send] = useMachine(
  toggle.machine({
    onValueChange(details) {
      // details => { value: string[] }
      console.log(details.value)
    },
  }),
)

Allowing multiple selection

Set the multiple property in the machine's context to true to allow multiple options to be toggled.

const [state, send] = useMachine(
  toggle.machine({
    multiple: true,
  }),
)

Disabling the toggle group

Set the disabled property in the machine's context to true to disable the toggle group.

const [state, send] = useMachine(
  toggle.machine({
    disabled: true,
  }),
)

Disabling a toggle

Set the disabled property in the getToggleProps function to true to disable a toggle.

//...
<div {...api.rootProps}>
  <button {...api.getToggleProps({ value: "bold", disabled: true })}>B</button>
</div>
//...

Disabling focus loop

The toggle group loops keyboard navigation by default. To disable this, set the loop property in the machine's context to false.

const [state, send] = useMachine(
  toggle.machine({
    loop: false,
  }),
)

Disabling roving focus management

The toggle group uses roving focus management by default. To disable this, set the rovingFocus property in the machine's context to false.

const [state, send] = useMachine(
  toggle.machine({
    rovingFocus: false,
  }),
)

Styling Guide

Earlier, we mentioned that each toggle group part has a data-part attribute added to them to select and style them in the DOM.

Pressed State

The toggle is pressed, the data-state attribute is applied to the toggle button with on or off values.

[data-part="toggle"][data-state="on|off"] {
  /* styles for toggle button */
}

Focused State

When a toggle button is focused, the data-focus is applied to the root and matching toggle button.

[data-part="root"][data-focus] {
  /* styles for the root */
}

[data-part="toggle"][data-focus] {
  /* styles for the toggle */
}

Disabled State

When a toggle button is disabled, the data-disabled is applied to the root and matching toggle button.

[data-part="root"][data-disabled] {
  /* styles for the root */
}

[data-part="toggle"][data-disabled] {
  /* styles for the toggle */
}

Methods and Properties

Machine Context

The toggle group machine exposes the following context properties:

  • idsPartial<{ root: string; toggle(value: string): string; }>The ids of the elements in the toggle. Useful for composition.
  • disabledbooleanWhether the toggle is disabled.
  • valuestring[]The values of the toggles in the group.
  • onValueChange(details: ValueChangeDetails) => voidFunction to call when the toggle is clicked.
  • loopFocusbooleanWhether to loop focus inside the toggle group.
  • rovingFocusbooleanWhether to use roving tab index to manage focus.
  • orientationOrientationThe orientation of the toggle group.
  • multiplebooleanWhether to allow multiple toggles to be selected.
  • dir"ltr" | "rtl"The document's text/writing direction.
  • idstringThe unique identifier of the machine.
  • getRootNode() => ShadowRoot | Node | DocumentA root node to correctly resolve document in custom environments. E.x.: Iframes, Electron.

Machine API

The toggle group api exposes the following methods:

  • valuestring[]The value of the toggle group.
  • setValue(values: string[]) => voidFunction to set the value of the toggle group.
  • getItemState(props: ItemProps) => ItemStateReturns the state of the toggle item.

Accessibility

Uses roving tabindex to manage focus movement among items.

Keyboard Interactions

  • Tab
    Moves focus to either the pressed item or the first item in the group.
  • Space
    Activates/deactivates the item.
  • Enter
    Activates/deactivates the item.
  • ArrowDown
    Moves focus to the next item in the group.
  • ArrowRight
    Moves focus to the next item in the group.
  • ArrowUp
    Moves focus to the previous item in the group.
  • ArrowLeft
    Moves focus to the previous item in the group.
  • Home
    Moves focus to the first item.
  • End
    Moves focus to the last item.

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