element-UI tree树形控件 修改小三角图标

.el-tree /deep/ .el-tree-node__expand-icon.expanded
{
-webkit-transform: rotate(0deg);
transform: rotate(0deg);
}
//有子节点 且未展开
.el-tree /deep/ .el-icon-caret-right:before
{
background: url("./images/folder.png") no-repeat 0 3px;
content: '';
display: block;
width: 16px;
height: 16px;
font-size: 16px;
background-size: 16px;
}
//有子节点 且已展开
.el-tree /deep/ .el-tree-node__expand-icon.expanded.el-icon-caret-right:before
{
background: url("./images/folderOpen.png") no-repeat 0 3px;
content: '';
display: block;
width: 16px;
height: 16px;
font-size: 16px;
background-size: 16px;
}
//没有子节点
.el-tree /deep/.el-tree-node__expand-icon.is-leaf::before
{
background: url("./images/file.png") no-repeat 0 3px;
content: '';
display: block;
width: 16px;
height: 16px;
font-size: 16px;
background-size: 16px;
}

本文转自： https://blog.csdn.net/weixin_45428021/article/details/123478696?spm=1001.2101.3001.6650.2&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-2.pc_relevant_aa&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-2.pc_relevant_aa&utm_relevant_index=5