vue+element树组件懒加载及样式修改

---

一、案例一

1、效果图

2、主要代码

（1）html

<template>  
   <div class="selOrgCon">
     <div class="center">
       <el-tree :props="props" :load="loadNode" lazy show-checkbox class="selOrgTree">
         <span class="custom-tree-node" slot-scope="{ node }">
           <span class="tree_point">
             {{ node.label }}span>
         span>
       el-tree>
     div>
template>

（2）js

<script>
export default {
  name: 'selOrg',
  data() {
    return {
      props: {
        label: 'orgName',
        children: 'zones',
        isLeaf: 'leaf'
      },
    }
  },
  methods: {
    // 懒加载
    loadNode(node, resolve) {
      if (node.level === 0) {
        return resolve([{ orgName: this.$global.yhname, syncId: this.$global.loginName }]);
      }
      if (node.level > 0) {
        // 懒加载下级组织--请求接口
        this.api_shyk.getOrgTree(node.data.syncId, res => {
          // res.data是个数组
          if (res.code == 0) {
            resolve(res.data);
          }
        })
      }

    }
  }
}
</script>

（3）css

.selOrgCon {
  padding-top: 15px;

  .center {
    width: 95%;
    margin: 3% auto;
  }
}

.selOrgTree {
    background: transparent;
	
	// 图标样式
    .el-tree-node__content>.el-tree-node__expand-icon {
        position: absolute;
        right: 1%;
        font-size: 0.28rem;
        color: red;

        &::before {
            content: "\E6E0";
        }

        &.is-leaf {
            display: none;
        }
    }

   
    .el-tree-node {
    	// 允许换行
        white-space: normal;

        .el-tree-node__content {
            margin-bottom: 2%;
            border-radius: 4px;
            font-size: 0.25rem;
            color: #000;
            height: auto;

            .custom-tree-node {
                width: 93%;
                background: #ffffff;
                border-radius: 4px;
                padding: 2%;
                padding-right: 6%;
                box-sizing: border-box;

                &:hover {
                    background-color: transparent;
                }
            }
            
			//选择框样式
            .el-checkbox__inner {
                border-radius: 50%;
                background: transparent;
                border-color: #8f9092;
                &:hover{
                    border-color: #ff4040;
                }
            }

            .el-checkbox__input.is-checked .el-checkbox__inner, .el-checkbox__input.is-indeterminate .el-checkbox__inner {
                background-color: #ff4040;
                border-color: #ff4040;
            }
            .el-checkbox__input.is-focus .el-checkbox__inner {
                border-color: #ff4040;
            }

        }
    }

    .el-tree-node__content:hover, .el-upload-list__item:hover {
        background-color: transparent;
    }
}