vue 使用element el-tree 樹形控件設置默認節點高亮

 <div class='tree'>
            <el-tree :data="treeList" :highlight-current="highLight" ref="treeList" :load="getTree"  :render-content="renderContent" :expand-on-click-node='false' :default-expanded-keys='[0]' node-key='id' :props="defaultProps" @node-click="handleNodeClick" lazy></el-tree>
        </div>

設置highlight-current爲true，設置ref="treeList"

     created(){
         
            this.$nextTick(function(){
                this.$refs.treeList.setCurrentKey(0);  //"treeList"是你自己在樹形控件上設置的 ref="treeList" 的名稱
            })
           
        },

vue created方法中調用setCurrentKey方法設置根節點高亮