@xstate/svelte

This package contains utilities for using XState with Svelte.

• Read the full documentation in the XState docs.
• Read our contribution guidelines.

Quick Start

1. Install xstate and @xstate/svelte:

npm i xstate @xstate/svelte

Via CDN

<script src="https://unpkg.com/@xstate/svelte/dist/xstate-svelte.min.js"></script>

By using the global variable XStateSvelte

or

<script src="https://unpkg.com/@xstate/svelte/dist/xstate-svelte.fsm.min.js"></script>

By using the global variable XStateSvelteFSM

2. Import useMachine

<script>
  import { useMachine } from '@xstate/svelte';
  import { createMachine } from 'xstate';

  const toggleMachine = createMachine({
    id: 'toggle',
    initial: 'inactive',
    states: {
      inactive: {
        on: { TOGGLE: 'active' }
      },
      active: {
        on: { TOGGLE: 'inactive' }
      }
    }
  });

  const { state, send } = useMachine(toggleMachine);
</script>

<button on:click={() => send('TOGGLE')}>
  {$state.value === 'inactive'
    ? 'Click to activate'
    : 'Active! Click to deactivate'}
</button>