setInterval timer

Wraps the native setInterval as a state machine: stays in ON while emitting interval events.

State diagram

stateDiagram-v2
    [*] --> starting : start
    starting --> on : start 🟢
    starting --> [*] : start 🔴
    on --> stopping : stop
    stopping --> off : stop 🟢
    stopping --> on : stop 🔴

Key points

• @ChangeState([FSM.INIT, FSM.OFF], FSM.ON) — start
• @ChangeState([], FSM.OFF) — stop() from any state
• Emits 'interval' events via this.emit for external listeners

Usage

const t = new SetIntervalFSM('tick')
t.on('interval' as any, () => console.log('tick'))
await t.start(1000)
// ... later
await t.stop()

Differences from the original

This example corresponds to afsm/fsms/setInterval.ts.