> For the complete documentation index, see [llms.txt](https://docs.matestack.io/matestack-ui-core/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.matestack.io/matestack-ui-core/1.5.0/reactivity/vuejs-event-hub.md).

# Vue.js Event Hub

Matestack offers an event hub, which can be used to communicate between components.

## Emitting events

`app/matestack/components/some_component.js`

```javascript
MatestackUiCore.Vue.component('some-component', {
  mixins: [MatestackUiCore.componentMixin],
  data() {
    return {}
  },
  mounted(){
    MatestackUiCore.matestackEventHub.$emit("some-event", { some: "optional data" })
  }
})
```

Use `MatestackUiCore.matestackEventHub.$emit(EVENT_NAME, OPTIONAL PAYLOAD)`

## Receiving events

`app/matestack/components/some_component.js`

```javascript
MatestackUiCore.Vue.component('some-component', {
  mixins: [MatestackUiCore.componentMixin],
  data() {
    return {}
  },
  methods: {
    reactToEvent(payload){
      console.log(payload)
    }
  },
  mounted(){
    MatestackUiCore.matestackEventHub.$on("some-event", this.reactToEvent)
  },
  beforeDestroy: function() {
    matestackEventHub.$off("some-event", this.reactToEvent)
  }
})
```

Make sure to cancel the event listener within the `beforeDestroy` hook!