1.复制

说明：复制Tree树形控件。

<script>
export default {
  data() {
    return {
      data: [{
        label: '一级 1',
        children: [{
          label: '二级 1-1',
          children: [{
            label: '三级 1-1-1'
          }]
        }]
      }, {
        label: '一级 2',
        children: [{
          label: '二级 2-1',
          children: [{
            label: '三级 2-1-1'
          }]
        }, {
          label: '二级 2-2',
          children: [{
            label: '三级 2-2-1'
          }]
        }]
      }, {
        label: '一级 3',
        children: [{
          label: '二级 3-1',
          children: [{
            label: '三级 3-1-1'
          }]
        }, {
          label: '二级 3-2',
          children: [{
            label: '三级 3-2-1'
          }]
        }]
      }],
      defaultProps: {
        children: 'children',
        label: 'label'
      }
    };
  },
  methods: {
    handleNodeClick(data) {
      console.log(data);
    }
  }
};
</script>
<template>
<div>
  <h1>我是树形控件</h1>
  <el-tree :data="data" :props="defaultProps" @node-click="handleNodeClick"></el-tree>
</div>
</template>

<style scoped>

</style>

2.显示 

3.图标

3.1新增图标

说明：每一个label前面都有一个定制图标

<template>
<div>
  <h1>我是树形控件</h1>
  <el-tree :data="data" :props="defaultProps" @node-click="handleNodeClick">
      <span slot-scope="{ node, data }" style="align-items: center">
        <i class="icon-book">
          <img style="width: 20px;" src="../../gis/images/bookmark-one.png">
        </i>
        <span>{{node.label}}</span>
      </span>
  </el-tree>
</div>
</template>

或者

<template>
<div>
  <h1>我是树形控件</h1>
  <el-tree class="custom-el-tree" :data="data" :props="defaultProps" @node-click="handleNodeClick">
    <template v-slot="{ node, data }">
    <span style="align-items: center">
      <i>
        <img style="width: 20px;" src="../../gis/images/bookmark-one.png">
      </i>
      <span>{{ node.label }}</span>
    </span>
    </template>
  </el-tree>
</div>
</template>

 

 

3.2修改默认图标

说明： 将默认箭头形式变成加号形式。

<style scoped>
/* 加号*/
/deep/ .custom-el-tree .el-icon-caret-right:before {
  content: "\e6d9";
  font-size: 18px;
}

</style>

 

4.源码

<script>
export default {
  data() {
    return {
      data: [{
        label: '一级 1',
        children: [{
          label: '二级 1-1',
          children: [{
            label: '三级 1-1-1'
          }]
        }]
      }, {
        label: '一级 2',
        children: [{
          label: '二级 2-1',
          children: [{
            label: '三级 2-1-1'
          }]
        }, {
          label: '二级 2-2',
          children: [{
            label: '三级 2-2-1'
          }]
        }]
      }, {
        label: '一级 3',
        children: [{
          label: '二级 3-1',
          children: [{
            label: '三级 3-1-1'
          }]
        }, {
          label: '二级 3-2',
          children: [{
            label: '三级 3-2-1'
          }]
        }]
      }],
      defaultProps: {
        children: 'children',
        label: 'label'
      }
    };
  },
  methods: {
    handleNodeClick(data) {
      console.log(data);
    }
  }
};
</script>
<template>
<div>
  <h1>我是树形控件</h1>
  <el-tree class="custom-el-tree" :data="data" :props="defaultProps" @node-click="handleNodeClick">
    <template v-slot="{ node, data }">
    <span style="align-items: center">
      <i>
        <img style="width: 20px;" src="../../gis/images/bookmark-one.png">
      </i>
      <span>{{ node.label }}</span>
    </span>
    </template>
  </el-tree>
</div>
</template>

<style scoped>
/* 加号*/
/deep/ .custom-el-tree .el-icon-caret-right:before {
  content: "\e6d9";
  font-size: 18px;
}

</style>