vuejs on scroll 修复侧边栏，答案

【问题标题】：vuejs on scroll fix the side bar,vuejs on scroll 修复侧边栏，
【发布时间】：2019-04-30 02:06:25
【问题描述】：

 <div class="col-sm-4 my-orders-order-now">
    <div :class="{ fixed: fixedOrderPanel }">
      <FixedPannel />
    </div>
    
  </div>



data () {
  return {
    orders: [],
    loading: false,
    fixedOrderPanel: false
 }
},

mounted () {
   this.getJokes()
   if (window !== undefined && window.addEventListener) {
    window.addEventListener('scroll',() => this.handleScroll(window.scrollY));
  }

},

 destroyed: function () { //Not working

 console.log('Afore')
    if (window !== undefined && window.removeEventListener) {
         window.removeEventListener('scroll', 
              ()=>this.handleScroll(window.scrollY));

    }
},

 methods: {
   handleScroll: function(scrolled){
   console.log('scrolling')
    if (scrolled > 160) {
        this.fixedOrderPanel = true
    } else {
        this.fixedOrderPanel = false
    }

},

}

window.removeEventListener 的滚动监听器在销毁/组件或路由更改 vuejs 后仍然完好无损。 window.removeEventListener 在更改路由或组件时不起作用，即使我尝试了 beforeDestroy() 和销毁的方法来删除滚动事件侦听器。

【问题讨论】：

Javascript removeEventListener not working的可能重复
这与您上次发布此内容时 linked to 的规范中列出的方法相同
我正在为侧边栏问题提供解决方案，没有匿名功能问题，删除重复

标签： javascript vue.js vuejs2 dom-events vue-router

【解决方案1】：

<div class="col-sm-4 my-orders-order-now">
   <div :class="{ fixed: fixedOrderPanel }">
     <FixedPannel />
   </div>

</div>  


components: {
    FixedPannel
}, 

mounted () {
    this.getJokes()
    document.addEventListener('scroll',  this.handleScroll);
  },

 destroyed: function () {
    document.removeEventListener('scroll', this.handleScroll);

 },

 methods: {

    handleScroll: function(){
        const checkWindow = window !== undefined && window.scrollY;

        if (checkWindow && window.scrollY > 160) {
           this.fixedOrderPanel = true
        } else {
           this.fixedOrderPanel = false
       }

     const scrollFix = (scrolled) => {
        if (scrolled > 160) {

           this.fixedOrderPanel = true
         } else {
           this.fixedOrderPanel = false
        }
    }

    }
}

<style>
.fixed{
  position: fixed;
  top: 0px;
  padding: 1%;
 }

</style>

【讨论】：