Vue 添加滚动监听

data () {
    return {
      scrolled: false
    }
},
ready () {
    window.addEventListener('scroll', this.handleScroll);
},
methods:{
    handleScroll () {
      this.scrolled = window.scrollY;
      console.log(this.scrolled)
    },
}，
destroyed () {
    window.removeEventListener('scroll', this.handleScroll)
},
created: function () {
    window.addEventListener('scroll', this.handleScroll)
}