Function cleanupEffect

packages/reactivity/src/effect.ts:569–582

(e: ReactiveEffect)

}

function cleanupEffect(e: ReactiveEffect) {
  const { cleanup } = e
  e.cleanup = undefined
  if (cleanup) {
    // run cleanup without active effect
    const prevSub = activeSub
    activeSub = undefined
    try {
      cleanup()
    } finally {
      activeSub = prevSub
    }
  }
}