Event Bus

The Event Bus is a system that works based on events.
When you call defineRule, it returns an instance of RouterRuleBus that can be used to listen for the following events.

• rule-resolve
  This event is triggered when any navigation is resolved.
• rule-accept
  This event is triggered when any navigation is accepted, more accurately, when next() or next(true) is called.
• rule-deny
  This event is triggered when any navigation is denied, more accurately, when next(false) is called.
• rule-redirect
  This event is triggered when any navigation is redirected, more accurately, navigation is resolved without accept or denied.
• no-rule-match
  This event is triggered when no rule is match in the end. In this situation, navigation will be accepted by default.

To use the event bus, simply do the following

const { bus } = defineRule(/** ... */)

bus.on('rule-resolve', event => {
    console.log(event.from) // The guard parameter `from`
    console.log(event.to) // The guard parameter `to`
    console.log(event.context) // The final context object when resolved
    console.log(event.remark) // The remark of the resolved rule
    console.log(event.index) // The index of the resolved rule
    console.log(event.nextParam) // The parameter passed in to `next` when resolved
})

Yes, it's quite straightforward!