on-v-chat-scroll-top-reached does't call the method

I am trying like this 

```
<div class="_chatBox_main _1scrollbar" v-chat-scroll="{smooth: true, notSmoothOnInit: true, image: true, always: false }" @on-v-chat-scroll-top-reached='handleScroll' ref="chat">
```

Here `@on-v-chat-scroll-top-reached` doesn't trigger the method `handleScroll`

Any solution?