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javascript - vuejs on scroll 修复侧边栏，

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在销毁/组件或路由更改 vuejs 后，滚动侦听器仍然完好无损。window.removeEventListener即使我尝试了这两种beforeDestroy()方法和销毁方法来删除滚动事件侦听器，也无法在更改路由或组件时工作。

标签： javascriptvue.jsvuejs2dom-eventsvue-router

解决方案

<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>

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