element之tree组件样式重写

1. 改写实现效果：

2.页面代码

3.样式代码

  .el-tree {
    background: #fff;
  }

  .tree-com .el-icon-caret-right:before {
    content: "";
    display: inline-block;
    background: url('./right.jpg');
    background-size: 7px 14px;
    width: 7px;
    height: 14px;
  }

  .tree-com .is-leaf.el-icon-caret-right:before {
    background: none;
  }