<li
  v-for="item in resourceList"
  :key="item.id"
  @click="handleClickFolder(item)"
  @contextmenu.prevent="openMenu($event,item)"
  >
  </li>

<ul v-show="visible" :style="{left:left+'px',top:top+'px'}" class="contextmenu">
 <!-- <li v-if="rightClickItem.fileType==99" @click="handleClickFolder(rightClickItem)">打开</li>
 <li @click="handleDelete(rightClickItem)">删除</li>
 <li @click="handleDownloadFile(rightClickItem)" v-if="rightClickItem.fileType!=99">下载</li>
 <li @click="handlePreviewFile(rightClickItem)" v-if="rightClickItem.fileType!=99">预览</li>
 <li @click="handleUpdate(rightClickItem)">编辑</li> -->
 <li>内容</li>
 </ul>

data() { 
 return {
 visible: false,
 top: 0,
 left: 0
 }
}

 watch: {
 visible(value) {
 if (value) {
 document.body.addEventListener('click', this.closeMenu)
 } else {
 document.body.removeEventListener('click', this.closeMenu)
 }
 }
 }

 openMenu(e, item) {
 this.rightClickItem = item;

 let x = e.clientX;
 let y = e.clientY;

 this.top = y;
 this.left = x;
 
 this.visible = true;
 },
 closeMenu() {
 this.visible = false;
 }

.contextmenu {
 margin: 0;
 background: #fff;
 z-index: 3000;
 position: fixed;
 list-style-type: none;
 padding: 5px 0;
 border-radius: 4px;
 font-size: 12px;
 font-weight: 400;
 color: #333;
 box-shadow: 2px 2px 3px 0 rgba(0, 0, 0, 0.3);
}

.contextmenu li {
 margin: 0;
 padding: 7px 16px;
 cursor: pointer;
}

.contextmenu li:hover {
 background-color: rgb(3, 125, 243);;
 color: white;
}