svelte robot factory

example

view in REPL

<!--
  example integration with https://thisrobot.life
	supports send, context, and machine (to include machine.current & machine.state)
-->

<script>
	import service from './store.js';
	import Child from './Child.svelte'
	const send = $service.send;
	$: current = $service.machine.current
</script>

<div>Current state value: {current}</div>
<Child/>

<button on:click={() => send('toggle')}>
	Toggle
</button>

/// svelte-robot-factory
import { writable } from 'svelte/store';
import { interpret } from 'robot3';

export function useMachine(machine, event) {
    
    const {subscribe, set} = writable(
        interpret(machine, service => set(service), event)
    )
    return {subscribe};
}

/// store
import { createMachine, state, transition, invoke, reduce } from 'robot3';
import { useMachine } from './svelte-robot-factory.js';
const context = event => ({
	foo: event.foo
});
const event = {
	foo: 'foo'
};
const machine = createMachine({
	inactive: state(
		transition('toggle', 'active', 
							 reduce((ctx, ev)=>({ ...ctx, foo: 'bar'}))
							)
	),
	active: state(
		transition('toggle', 'inactive', 
							 reduce((ctx, ev)=>({ ...ctx, foo: 'foo'}))
							)
	)
}, context);

const service = useMachine(machine, event);
export default service;

/// Child.svelte
<script>
import service from './store.js';
$: foo = $service.context.foo;
</script>

<div>Context value of foo property: {foo}</div>