vue中的hook的使用

## vue3中的hook的使用

import { reactive,onMounted,onBeforeUnmount } from "vue";
export default function(){
  let point = reactive({
    x:0,
    y:0
  })
  function MyPoint(event){
      point.x = event.pageX
      point.y = event.pageY
      console.log(event.pageY,event.pageX);
      
    }
  onMounted(()=>{
    window.addEventListener('click',MyPoint)
  })
  onBeforeUnmount(()=>{
    window.removeEventListener('click',MyPoint)
  })
  return point
}