el-tree选中背景变色

1、加  属性    highlight-current

<el-tree :props="treeProps" :load="loadNode" highlight-current @node-click="clickNode" lazy></el-tree>

2、加样式

<style >

.el-tree-node.is-current > .el-tree-node__content {
  background-color: rgb(64, 158, 255) !important;
}

</style>