onMounted、onCreated等使用

import {onMounted, ref} from 'vue'

export default function useMouse() {
    let x = ref(0)
    let y = ref(0)

    onMounted(() => {
        window.addEventListener('mousemove', e => {
            x.value = e.pageX
            y.value = e.pageY
        })
    })
    return {x, y};//x,y可以在组件中使用
}