el-tree 与 el-popover 一起使用，以避免事件冒泡

  <el-tree ref="sceneTreeRef" :filter-node-method="filterNode" class="scene-layer-tree" show-checkbox
            node-key="nodeKey" :allow-drag="allowDragHandler" :allow-drop="allowDropHandler" @node-drop="handleDrop"
            :data="TreeData.list" draggable default-expand-all @check="check">
            <template #default="{ data }">
                <span :title="data.title" class="tree-item-title">
                    <i class="fal fa-folder-open" style="color: #f2cc7b; margin: 5px" v-if="data.type == 'group'"></i>
                    <!-- 可以选择用一个< span >将整个< el-popover >包起来，给span加 一个 @click.stop，即可阻止冒泡 -->
                    <span @click.stop>
                        <el-popover placement="top" :width="200" trigger="click" class="propovers">
                            <template #reference>
                                <i class="fal fa-cog icon-setting"></i>
                            </template>
                            <template #default>
                                <div class="edit-item" v-if="data.type != 'root'" @click=editLayer(data)>
                                    <i class="fal fa-edit"></i>
                                    <span>{{ $t("x_edit") }}</span>
                                </div>
                                <div class="edit-item" v-if="data.type == 'group' || data.type == 'root'"
                                    @click="addNewLayer(data)">
                                    <i class="fal fa-layer-plus"></i>
                                    <span>{{ $t("x_add_a_new_layer") }}</span>
                                </div>
                                <div class="edit-item" v-if="data.type == 'group' || data.type == 'root'"
                                    @click="addFolder(data)">
                                    <i class="fal fa-folder-plus"></i>
                                    <span>{{ $t("x_add_folders") }}</span>
                                </div>
                                <div class="edit-item" v-if="data.type != 'root'" @click="deleteLayerFromTree(data)">
                                    <i class="fal fa-trash-alt"></i>
                                    <span>{{ $t("x_delete") }}</span>
                                </div>
                            </template>
                        </el-popover>
                    </span>
                    {{ data.title }}
                </span>
            </template>
        </el-tree>

解决方法： 可以选择用一个< span >将整个< el-popover >包起来，给span加 一个 @click.stop，即可阻止冒泡