Element Cascader 级联选择器 Element Cascader 级联选择器的使用示例

ForeverJPB. 2021-01-29 我要评论

组件—级联选择器

基础用法

<div class="block">
 <span class="demonstration">默认 click 触发子菜单</span>
 <el-cascader
  v-model="value"
  :options="options"
  @change="handleChange"></el-cascader>
</div>
<div class="block">
 <span class="demonstration">hover 触发子菜单</span>
 <el-cascader
  v-model="value"
  :options="options"
  :props="{ expandTrigger: 'hover' }"
  @change="handleChange"></el-cascader>
</div>

<script>
 export default {
  data() {
   return {
    value: [],
    options: [{
     value: 'zhinan',
     label: '指南',
     children: [{
      value: 'shejiyuanze',
      label: '设计原则',
      children: [{
       value: 'yizhi',
       label: '一致'
      }, {
       value: 'fankui',
       label: '反馈'
      }, {
       value: 'xiaolv',
       label: '效率'
      }, {
       value: 'kekong',
       label: '可控'
      }]
     }, {
      value: 'daohang',
      label: '导航',
      children: [{
       value: 'cexiangdaohang',
       label: '侧向导航'
      }, {
       value: 'dingbudaohang',
       label: '顶部导航'
      }]
     }]
    }, {
     value: 'zujian',
     label: '组件',
     children: [{
      value: 'basic',
      label: 'Basic',
      children: [{
       value: 'layout',
       label: 'Layout 布局'
      }, {
       value: 'color',
       label: 'Color 色彩'
      }, {
       value: 'typography',
       label: 'Typography 字体'
      }, {
       value: 'icon',
       label: 'Icon 图标'
      }, {
       value: 'button',
       label: 'Button 按钮'
      }]
     }, {
      value: 'form',
      label: 'Form',
      children: [{
       value: 'radio',
       label: 'Radio 单选框'
      }, {
       value: 'checkbox',
       label: 'Checkbox 多选框'
      }, {
       value: 'input',
       label: 'Input 输入框'
      }, {
       value: 'input-number',
       label: 'InputNumber 计数器'
      }, {
       value: 'select',
       label: 'Select 选择器'
      }, {
       value: 'cascader',
       label: 'Cascader 级联选择器'
      }, {
       value: 'switch',
       label: 'Switch 开关'
      }, {
       value: 'slider',
       label: 'Slider 滑块'
      }, {
       value: 'time-picker',
       label: 'TimePicker 时间选择器'
      }, {
       value: 'date-picker',
       label: 'DatePicker 日期选择器'
      }, {
       value: 'datetime-picker',
       label: 'DateTimePicker 日期时间选择器'
      }, {
       value: 'upload',
       label: 'Upload 上传'
      }, {
       value: 'rate',
       label: 'Rate 评分'
      }, {
       value: 'form',
       label: 'Form 表单'
      }]
     }, {
      value: 'data',
      label: 'Data',
      children: [{
       value: 'table',
       label: 'Table 表格'
      }, {
       value: 'tag',
       label: 'Tag 标签'
      }, {
       value: 'progress',
       label: 'Progress 进度条'
      }, {
       value: 'tree',
       label: 'Tree 树形控件'
      }, {
       value: 'pagination',
       label: 'Pagination 分页'
      }, {
       value: 'badge',
       label: 'Badge 标记'
      }]
     }, {
      value: 'notice',
      label: 'Notice',
      children: [{
       value: 'alert',
       label: 'Alert 警告'
      }, {
       value: 'loading',
       label: 'Loading 加载'
      }, {
       value: 'message',
       label: 'Message 消息提示'
      }, {
       value: 'message-box',
       label: 'MessageBox 弹框'
      }, {
       value: 'notification',
       label: 'Notification 通知'
      }]
     }, {
      value: 'navigation',
      label: 'Navigation',
      children: [{
       value: 'menu',
       label: 'NavMenu 导航菜单'
      }, {
       value: 'tabs',
       label: 'Tabs 标签页'
      }, {
       value: 'breadcrumb',
       label: 'Breadcrumb 面包屑'
      }, {
       value: 'dropdown',
       label: 'Dropdown 下拉菜单'
      }, {
       value: 'steps',
       label: 'Steps 步骤条'
      }]
     }, {
      value: 'others',
      label: 'Others',
      children: [{
       value: 'dialog',
       label: 'Dialog 对话框'
      }, {
       value: 'tooltip',
       label: 'Tooltip 文字提示'
      }, {
       value: 'popover',
       label: 'Popover 弹出框'
      }, {
       value: 'card',
       label: 'Card 卡片'
      }, {
       value: 'carousel',
       label: 'Carousel 走马灯'
      }, {
       value: 'collapse',
       label: 'Collapse 折叠面板'
      }]
     }]
    }, {
     value: 'ziyuan',
     label: '资源',
     children: [{
      value: 'axure',
      label: 'Axure Components'
     }, {
      value: 'sketch',
      label: 'Sketch Templates'
     }, {
      value: 'jiaohu',
      label: '组件交互文档'
     }]
    }]
   };
  },
  methods: {
   handleChange(value) {
    console.log(value);
   }
  }
 };
</script>

禁用选项

<el-cascader :options="options"></el-cascader>

<script>
 export default {
  data() {
   return {
    options: [{
     value: 'zhinan',
     label: '指南',
     disabled: true,
     children: [{
      value: 'shejiyuanze',
      label: '设计原则',
      children: [{
       value: 'yizhi',
       label: '一致'
      }, {
       value: 'fankui',
       label: '反馈'
      }, {
       value: 'xiaolv',
       label: '效率'
      }, {
       value: 'kekong',
       label: '可控'
      }]
     }, {
      value: 'daohang',
      label: '导航',
      children: [{
       value: 'cexiangdaohang',
       label: '侧向导航'
      }, {
       value: 'dingbudaohang',
       label: '顶部导航'
      }]
     }]
    }, {
     value: 'zujian',
     label: '组件',
     children: [{
      value: 'basic',
      label: 'Basic',
      children: [{
       value: 'layout',
       label: 'Layout 布局'
      }, {
       value: 'color',
       label: 'Color 色彩'
      }, {
       value: 'typography',
       label: 'Typography 字体'
      }, {
       value: 'icon',
       label: 'Icon 图标'
      }, {
       value: 'button',
       label: 'Button 按钮'
      }]
     }, {
      value: 'form',
      label: 'Form',
      children: [{
       value: 'radio',
       label: 'Radio 单选框'
      }, {
       value: 'checkbox',
       label: 'Checkbox 多选框'
      }, {
       value: 'input',
       label: 'Input 输入框'
      }, {
       value: 'input-number',
       label: 'InputNumber 计数器'
      }, {
       value: 'select',
       label: 'Select 选择器'
      }, {
       value: 'cascader',
       label: 'Cascader 级联选择器'
      }, {
       value: 'switch',
       label: 'Switch 开关'
      }, {
       value: 'slider',
       label: 'Slider 滑块'
      }, {
       value: 'time-picker',
       label: 'TimePicker 时间选择器'
      }, {
       value: 'date-picker',
       label: 'DatePicker 日期选择器'
      }, {
       value: 'datetime-picker',
       label: 'DateTimePicker 日期时间选择器'
      }, {
       value: 'upload',
       label: 'Upload 上传'
      }, {
       value: 'rate',
       label: 'Rate 评分'
      }, {
       value: 'form',
       label: 'Form 表单'
      }]
     }, {
      value: 'data',
      label: 'Data',
      children: [{
       value: 'table',
       label: 'Table 表格'
      }, {
       value: 'tag',
       label: 'Tag 标签'
      }, {
       value: 'progress',
       label: 'Progress 进度条'
      }, {
       value: 'tree',
       label: 'Tree 树形控件'
      }, {
       value: 'pagination',
       label: 'Pagination 分页'
      }, {
       value: 'badge',
       label: 'Badge 标记'
      }]
     }, {
      value: 'notice',
      label: 'Notice',
      children: [{
       value: 'alert',
       label: 'Alert 警告'
      }, {
       value: 'loading',
       label: 'Loading 加载'
      }, {
       value: 'message',
       label: 'Message 消息提示'
      }, {
       value: 'message-box',
       label: 'MessageBox 弹框'
      }, {
       value: 'notification',
       label: 'Notification 通知'
      }]
     }, {
      value: 'navigation',
      label: 'Navigation',
      children: [{
       value: 'menu',
       label: 'NavMenu 导航菜单'
      }, {
       value: 'tabs',
       label: 'Tabs 标签页'
      }, {
       value: 'breadcrumb',
       label: 'Breadcrumb 面包屑'
      }, {
       value: 'dropdown',
       label: 'Dropdown 下拉菜单'
      }, {
       value: 'steps',
       label: 'Steps 步骤条'
      }]
     }, {
      value: 'others',
      label: 'Others',
      children: [{
       value: 'dialog',
       label: 'Dialog 对话框'
      }, {
       value: 'tooltip',
       label: 'Tooltip 文字提示'
      }, {
       value: 'popover',
       label: 'Popover 弹出框'
      }, {
       value: 'card',
       label: 'Card 卡片'
      }, {
       value: 'carousel',
       label: 'Carousel 走马灯'
      }, {
       value: 'collapse',
       label: 'Collapse 折叠面板'
      }]
     }]
    }, {
     value: 'ziyuan',
     label: '资源',
     children: [{
      value: 'axure',
      label: 'Axure Components'
     }, {
      value: 'sketch',
      label: 'Sketch Templates'
     }, {
      value: 'jiaohu',
      label: '组件交互文档'
     }]
    }]
   };
  }
 };
</script>

可清空

<el-cascader :options="options" clearable></el-cascader>

<script>
 export default {
  data() {
   return {
    options: [{
     value: 'zhinan',
     label: '指南',
     children: [{
      value: 'shejiyuanze',
      label: '设计原则',
      children: [{
       value: 'yizhi',
       label: '一致'
      }, {
       value: 'fankui',
       label: '反馈'
      }, {
       value: 'xiaolv',
       label: '效率'
      }, {
       value: 'kekong',
       label: '可控'
      }]
     }, {
      value: 'daohang',
      label: '导航',
      children: [{
       value: 'cexiangdaohang',
       label: '侧向导航'
      }, {
       value: 'dingbudaohang',
       label: '顶部导航'
      }]
     }]
    }, {
     value: 'zujian',
     label: '组件',
     children: [{
      value: 'basic',
      label: 'Basic',
      children: [{
       value: 'layout',
       label: 'Layout 布局'
      }, {
       value: 'color',
       label: 'Color 色彩'
      }, {
       value: 'typography',
       label: 'Typography 字体'
      }, {
       value: 'icon',
       label: 'Icon 图标'
      }, {
       value: 'button',
       label: 'Button 按钮'
      }]
     }, {
      value: 'form',
      label: 'Form',
      children: [{
       value: 'radio',
       label: 'Radio 单选框'
      }, {
       value: 'checkbox',
       label: 'Checkbox 多选框'
      }, {
       value: 'input',
       label: 'Input 输入框'
      }, {
       value: 'input-number',
       label: 'InputNumber 计数器'
      }, {
       value: 'select',
       label: 'Select 选择器'
      }, {
       value: 'cascader',
       label: 'Cascader 级联选择器'
      }, {
       value: 'switch',
       label: 'Switch 开关'
      }, {
       value: 'slider',
       label: 'Slider 滑块'
      }, {
       value: 'time-picker',
       label: 'TimePicker 时间选择器'
      }, {
       value: 'date-picker',
       label: 'DatePicker 日期选择器'
      }, {
       value: 'datetime-picker',
       label: 'DateTimePicker 日期时间选择器'
      }, {
       value: 'upload',
       label: 'Upload 上传'
      }, {
       value: 'rate',
       label: 'Rate 评分'
      }, {
       value: 'form',
       label: 'Form 表单'
      }]
     }, {
      value: 'data',
      label: 'Data',
      children: [{
       value: 'table',
       label: 'Table 表格'
      }, {
       value: 'tag',
       label: 'Tag 标签'
      }, {
       value: 'progress',
       label: 'Progress 进度条'
      }, {
       value: 'tree',
       label: 'Tree 树形控件'
      }, {
       value: 'pagination',
       label: 'Pagination 分页'
      }, {
       value: 'badge',
       label: 'Badge 标记'
      }]
     }, {
      value: 'notice',
      label: 'Notice',
      children: [{
       value: 'alert',
       label: 'Alert 警告'
      }, {
       value: 'loading',
       label: 'Loading 加载'
      }, {
       value: 'message',
       label: 'Message 消息提示'
      }, {
       value: 'message-box',
       label: 'MessageBox 弹框'
      }, {
       value: 'notification',
       label: 'Notification 通知'
      }]
     }, {
      value: 'navigation',
      label: 'Navigation',
      children: [{
       value: 'menu',
       label: 'NavMenu 导航菜单'
      }, {
       value: 'tabs',
       label: 'Tabs 标签页'
      }, {
       value: 'breadcrumb',
       label: 'Breadcrumb 面包屑'
      }, {
       value: 'dropdown',
       label: 'Dropdown 下拉菜单'
      }, {
       value: 'steps',
       label: 'Steps 步骤条'
      }]
     }, {
      value: 'others',
      label: 'Others',
      children: [{
       value: 'dialog',
       label: 'Dialog 对话框'
      }, {
       value: 'tooltip',
       label: 'Tooltip 文字提示'
      }, {
       value: 'popover',
       label: 'Popover 弹出框'
      }, {
       value: 'card',
       label: 'Card 卡片'
      }, {
       value: 'carousel',
       label: 'Carousel 走马灯'
      }, {
       value: 'collapse',
       label: 'Collapse 折叠面板'
      }]
     }]
    }, {
     value: 'ziyuan',
     label: '资源',
     children: [{
      value: 'axure',
      label: 'Axure Components'
     }, {
      value: 'sketch',
      label: 'Sketch Templates'
     }, {
      value: 'jiaohu',
      label: '组件交互文档'
     }]
    }]
   }
  }
 }
</script>

仅显示最后一级

<el-cascader :options="options" :show-all-levels="false"></el-cascader>

<script>
 export default {
  data() {
   return {
    options: [{
     value: 'zhinan',
     label: '指南',
     children: [{
      value: 'shejiyuanze',
      label: '设计原则',
      children: [{
       value: 'yizhi',
       label: '一致'
      }, {
       value: 'fankui',
       label: '反馈'
      }, {
       value: 'xiaolv',
       label: '效率'
      }, {
       value: 'kekong',
       label: '可控'
      }]
     }, {
      value: 'daohang',
      label: '导航',
      children: [{
       value: 'cexiangdaohang',
       label: '侧向导航'
      }, {
       value: 'dingbudaohang',
       label: '顶部导航'
      }]
     }]
    }, {
     value: 'zujian',
     label: '组件',
     children: [{
      value: 'basic',
      label: 'Basic',
      children: [{
       value: 'layout',
       label: 'Layout 布局'
      }, {
       value: 'color',
       label: 'Color 色彩'
      }, {
       value: 'typography',
       label: 'Typography 字体'
      }, {
       value: 'icon',
       label: 'Icon 图标'
      }, {
       value: 'button',
       label: 'Button 按钮'
      }]
     }, {
      value: 'form',
      label: 'Form',
      children: [{
       value: 'radio',
       label: 'Radio 单选框'
      }, {
       value: 'checkbox',
       label: 'Checkbox 多选框'
      }, {
       value: 'input',
       label: 'Input 输入框'
      }, {
       value: 'input-number',
       label: 'InputNumber 计数器'
      }, {
       value: 'select',
       label: 'Select 选择器'
      }, {
       value: 'cascader',
       label: 'Cascader 级联选择器'
      }, {
       value: 'switch',
       label: 'Switch 开关'
      }, {
       value: 'slider',
       label: 'Slider 滑块'
      }, {
       value: 'time-picker',
       label: 'TimePicker 时间选择器'
      }, {
       value: 'date-picker',
       label: 'DatePicker 日期选择器'
      }, {
       value: 'datetime-picker',
       label: 'DateTimePicker 日期时间选择器'
      }, {
       value: 'upload',
       label: 'Upload 上传'
      }, {
       value: 'rate',
       label: 'Rate 评分'
      }, {
       value: 'form',
       label: 'Form 表单'
      }]
     }, {
      value: 'data',
      label: 'Data',
      children: [{
       value: 'table',
       label: 'Table 表格'
      }, {
       value: 'tag',
       label: 'Tag 标签'
      }, {
       value: 'progress',
       label: 'Progress 进度条'
      }, {
       value: 'tree',
       label: 'Tree 树形控件'
      }, {
       value: 'pagination',
       label: 'Pagination 分页'
      }, {
       value: 'badge',
       label: 'Badge 标记'
      }]
     }, {
      value: 'notice',
      label: 'Notice',
      children: [{
       value: 'alert',
       label: 'Alert 警告'
      }, {
       value: 'loading',
       label: 'Loading 加载'
      }, {
       value: 'message',
       label: 'Message 消息提示'
      }, {
       value: 'message-box',
       label: 'MessageBox 弹框'
      }, {
       value: 'notification',
       label: 'Notification 通知'
      }]
     }, {
      value: 'navigation',
      label: 'Navigation',
      children: [{
       value: 'menu',
       label: 'NavMenu 导航菜单'
      }, {
       value: 'tabs',
       label: 'Tabs 标签页'
      }, {
       value: 'breadcrumb',
       label: 'Breadcrumb 面包屑'
      }, {
       value: 'dropdown',
       label: 'Dropdown 下拉菜单'
      }, {
       value: 'steps',
       label: 'Steps 步骤条'
      }]
     }, {
      value: 'others',
      label: 'Others',
      children: [{
       value: 'dialog',
       label: 'Dialog 对话框'
      }, {
       value: 'tooltip',
       label: 'Tooltip 文字提示'
      }, {
       value: 'popover',
       label: 'Popover 弹出框'
      }, {
       value: 'card',
       label: 'Card 卡片'
      }, {
       value: 'carousel',
       label: 'Carousel 走马灯'
      }, {
       value: 'collapse',
       label: 'Collapse 折叠面板'
      }]
     }]
    }, {
     value: 'ziyuan',
     label: '资源',
     children: [{
      value: 'axure',
      label: 'Axure Components'
     }, {
      value: 'sketch',
      label: 'Sketch Templates'
     }, {
      value: 'jiaohu',
      label: '组件交互文档'
     }]
    }]
   };
  }
 };
</script>

多选

<div class="block">
 <span class="demonstration">默认显示所有Tag</span>
 <el-cascader
  :options="options"
  :props="props"
  clearable></el-cascader>
</div>
<div class="block">
 <span class="demonstration">折叠展示Tag</span>
 <el-cascader
  :options="options"
  :props="props"
  collapse-tags
  clearable></el-cascader>
</div>

<script>
 export default {
  data() {
   return {
    props: { multiple: true },
    options: [{
     value: 1,
     label: '东南',
     children: [{
      value: 2,
      label: '上海',
      children: [
       { value: 3, label: '普陀' },
       { value: 4, label: '黄埔' },
       { value: 5, label: '徐汇' }
      ]
     }, {
      value: 7,
      label: '江苏',
      children: [
       { value: 8, label: '南京' },
       { value: 9, label: '苏州' },
       { value: 10, label: '无锡' }
      ]
     }, {
      value: 12,
      label: '浙江',
      children: [
       { value: 13, label: '杭州' },
       { value: 14, label: '宁波' },
       { value: 15, label: '嘉兴' }
      ]
     }]
    }, {
     value: 17,
     label: '西北',
     children: [{
      value: 18,
      label: '陕西',
      children: [
       { value: 19, label: '西安' },
       { value: 20, label: '延安' }
      ]
     }, {
      value: 21,
      label: '新疆维吾尔族自治区',
      children: [
       { value: 22, label: '乌鲁木齐' },
       { value: 23, label: '克拉玛依' }
      ]
     }]
    }]
   };
  }
 };
</script>

选择任意一级选项

<div class="block">
 <span class="demonstration">单选选择任意一级选项</span>
 <el-cascader
  :options="options"
  :props="{ checkStrictly: true }"
  clearable></el-cascader>
</div>
<div class="block">
 <span class="demonstration">多选选择任意一级选项</span>
 <el-cascader
  :options="options"
  :props="{ multiple: true, checkStrictly: true }"
  clearable></el-cascader>
</div>

<script>
 export default {
  data() {
   return {
    options: [{
     value: 'zhinan',
     label: '指南',
     children: [{
      value: 'shejiyuanze',
      label: '设计原则',
      children: [{
       value: 'yizhi',
       label: '一致'
      }, {
       value: 'fankui',
       label: '反馈'
      }, {
       value: 'xiaolv',
       label: '效率'
      }, {
       value: 'kekong',
       label: '可控'
      }]
     }, {
      value: 'daohang',
      label: '导航',
      children: [{
       value: 'cexiangdaohang',
       label: '侧向导航'
      }, {
       value: 'dingbudaohang',
       label: '顶部导航'
      }]
     }]
    }, {
     value: 'zujian',
     label: '组件',
     children: [{
      value: 'basic',
      label: 'Basic',
      children: [{
       value: 'layout',
       label: 'Layout 布局'
      }, {
       value: 'color',
       label: 'Color 色彩'
      }, {
       value: 'typography',
       label: 'Typography 字体'
      }, {
       value: 'icon',
       label: 'Icon 图标'
      }, {
       value: 'button',
       label: 'Button 按钮'
      }]
     }, {
      value: 'form',
      label: 'Form',
      children: [{
       value: 'radio',
       label: 'Radio 单选框'
      }, {
       value: 'checkbox',
       label: 'Checkbox 多选框'
      }, {
       value: 'input',
       label: 'Input 输入框'
      }, {
       value: 'input-number',
       label: 'InputNumber 计数器'
      }, {
       value: 'select',
       label: 'Select 选择器'
      }, {
       value: 'cascader',
       label: 'Cascader 级联选择器'
      }, {
       value: 'switch',
       label: 'Switch 开关'
      }, {
       value: 'slider',
       label: 'Slider 滑块'
      }, {
       value: 'time-picker',
       label: 'TimePicker 时间选择器'
      }, {
       value: 'date-picker',
       label: 'DatePicker 日期选择器'
      }, {
       value: 'datetime-picker',
       label: 'DateTimePicker 日期时间选择器'
      }, {
       value: 'upload',
       label: 'Upload 上传'
      }, {
       value: 'rate',
       label: 'Rate 评分'
      }, {
       value: 'form',
       label: 'Form 表单'
      }]
     }, {
      value: 'data',
      label: 'Data',
      children: [{
       value: 'table',
       label: 'Table 表格'
      }, {
       value: 'tag',
       label: 'Tag 标签'
      }, {
       value: 'progress',
       label: 'Progress 进度条'
      }, {
       value: 'tree',
       label: 'Tree 树形控件'
      }, {
       value: 'pagination',
       label: 'Pagination 分页'
      }, {
       value: 'badge',
       label: 'Badge 标记'
      }]
     }, {
      value: 'notice',
      label: 'Notice',
      children: [{
       value: 'alert',
       label: 'Alert 警告'
      }, {
       value: 'loading',
       label: 'Loading 加载'
      }, {
       value: 'message',
       label: 'Message 消息提示'
      }, {
       value: 'message-box',
       label: 'MessageBox 弹框'
      }, {
       value: 'notification',
       label: 'Notification 通知'
      }]
     }, {
      value: 'navigation',
      label: 'Navigation',
      children: [{
       value: 'menu',
       label: 'NavMenu 导航菜单'
      }, {
       value: 'tabs',
       label: 'Tabs 标签页'
      }, {
       value: 'breadcrumb',
       label: 'Breadcrumb 面包屑'
      }, {
       value: 'dropdown',
       label: 'Dropdown 下拉菜单'
      }, {
       value: 'steps',
       label: 'Steps 步骤条'
      }]
     }, {
      value: 'others',
      label: 'Others',
      children: [{
       value: 'dialog',
       label: 'Dialog 对话框'
      }, {
       value: 'tooltip',
       label: 'Tooltip 文字提示'
      }, {
       value: 'popover',
       label: 'Popover 弹出框'
      }, {
       value: 'card',
       label: 'Card 卡片'
      }, {
       value: 'carousel',
       label: 'Carousel 走马灯'
      }, {
       value: 'collapse',
       label: 'Collapse 折叠面板'
      }]
     }]
    }, {
     value: 'ziyuan',
     label: '资源',
     children: [{
      value: 'axure',
      label: 'Axure Components'
     }, {
      value: 'sketch',
      label: 'Sketch Templates'
     }, {
      value: 'jiaohu',
      label: '组件交互文档'
     }]
    }]
   };
  }
 };
</script>

动态加载

<el-cascader :props="props"></el-cascader>

<script>
 let id = 0;

 export default {
  data() {
   return {
    props: {
     lazy: true,
     lazyLoad (node, resolve) {
      const { level } = node;
      setTimeout(() => {
       const nodes = Array.from({ length: level + 1 })
        .map(item => ({
         value: ++id,
         label: `选项${id}`,
         leaf: level >= 2
        }));
       // 通过调用resolve将子节点数据返回，通知组件数据加载完成
       resolve(nodes);
      }, 1000);
     }
    }
   };
  }
 };

可搜索

<div class="block">
 <span class="demonstration">单选可搜索</span>
 <el-cascader
  placeholder="试试搜索：指南"
  :options="options"
  filterable></el-cascader>
</div>
<div class="block">
 <span class="demonstration">多选可搜索</span>
 <el-cascader
  placeholder="试试搜索：指南"
  :options="options"
  :props="{ multiple: true }"
  filterable></el-cascader>
</div>

<script>
 export default {
  data() {
   return {
    options: [{
     value: 'zhinan',
     label: '指南',
     children: [{
      value: 'shejiyuanze',
      label: '设计原则',
      children: [{
       value: 'yizhi',
       label: '一致'
      }, {
       value: 'fankui',
       label: '反馈'
      }, {
       value: 'xiaolv',
       label: '效率'
      }, {
       value: 'kekong',
       label: '可控'
      }]
     }, {
      value: 'daohang',
      label: '导航',
      children: [{
       value: 'cexiangdaohang',
       label: '侧向导航'
      }, {
       value: 'dingbudaohang',
       label: '顶部导航'
      }]
     }]
    }, {
     value: 'zujian',
     label: '组件',
     children: [{
      value: 'basic',
      label: 'Basic',
      children: [{
       value: 'layout',
       label: 'Layout 布局'
      }, {
       value: 'color',
       label: 'Color 色彩'
      }, {
       value: 'typography',
       label: 'Typography 字体'
      }, {
       value: 'icon',
       label: 'Icon 图标'
      }, {
       value: 'button',
       label: 'Button 按钮'
      }]
     }, {
      value: 'form',
      label: 'Form',
      children: [{
       value: 'radio',
       label: 'Radio 单选框'
      }, {
       value: 'checkbox',
       label: 'Checkbox 多选框'
      }, {
       value: 'input',
       label: 'Input 输入框'
      }, {
       value: 'input-number',
       label: 'InputNumber 计数器'
      }, {
       value: 'select',
       label: 'Select 选择器'
      }, {
       value: 'cascader',
       label: 'Cascader 级联选择器'
      }, {
       value: 'switch',
       label: 'Switch 开关'
      }, {
       value: 'slider',
       label: 'Slider 滑块'
      }, {
       value: 'time-picker',
       label: 'TimePicker 时间选择器'
      }, {
       value: 'date-picker',
       label: 'DatePicker 日期选择器'
      }, {
       value: 'datetime-picker',
       label: 'DateTimePicker 日期时间选择器'
      }, {
       value: 'upload',
       label: 'Upload 上传'
      }, {
       value: 'rate',
       label: 'Rate 评分'
      }, {
       value: 'form',
       label: 'Form 表单'
      }]
     }, {
      value: 'data',
      label: 'Data',
      children: [{
       value: 'table',
       label: 'Table 表格'
      }, {
       value: 'tag',
       label: 'Tag 标签'
      }, {
       value: 'progress',
       label: 'Progress 进度条'
      }, {
       value: 'tree',
       label: 'Tree 树形控件'
      }, {
       value: 'pagination',
       label: 'Pagination 分页'
      }, {
       value: 'badge',
       label: 'Badge 标记'
      }]
     }, {
      value: 'notice',
      label: 'Notice',
      children: [{
       value: 'alert',
       label: 'Alert 警告'
      }, {
       value: 'loading',
       label: 'Loading 加载'
      }, {
       value: 'message',
       label: 'Message 消息提示'
      }, {
       value: 'message-box',
       label: 'MessageBox 弹框'
      }, {
       value: 'notification',
       label: 'Notification 通知'
      }]
     }, {
      value: 'navigation',
      label: 'Navigation',
      children: [{
       value: 'menu',
       label: 'NavMenu 导航菜单'
      }, {
       value: 'tabs',
       label: 'Tabs 标签页'
      }, {
       value: 'breadcrumb',
       label: 'Breadcrumb 面包屑'
      }, {
       value: 'dropdown',
       label: 'Dropdown 下拉菜单'
      }, {
       value: 'steps',
       label: 'Steps 步骤条'
      }]
     }, {
      value: 'others',
      label: 'Others',
      children: [{
       value: 'dialog',
       label: 'Dialog 对话框'
      }, {
       value: 'tooltip',
       label: 'Tooltip 文字提示'
      }, {
       value: 'popover',
       label: 'Popover 弹出框'
      }, {
       value: 'card',
       label: 'Card 卡片'
      }, {
       value: 'carousel',
       label: 'Carousel 走马灯'
      }, {
       value: 'collapse',
       label: 'Collapse 折叠面板'
      }]
     }]
    }, {
     value: 'ziyuan',
     label: '资源',
     children: [{
      value: 'axure',
      label: 'Axure Components'
     }, {
      value: 'sketch',
      label: 'Sketch Templates'
     }, {
      value: 'jiaohu',
      label: '组件交互文档'
     }]
    }]
   };
  }
 };
</script>

自定义节点内容

<el-cascader :options="options">
 <template slot-scope="{ node, data }">
  <span>{{ data.label }}</span>
  <span v-if="!node.isLeaf"> ({{ data.children.length }}) </span>
 </template>
</el-cascader>

<script>
 export default {
  data() {
   return {
    options: [{
     value: 'zhinan',
     label: '指南',
     children: [{
      value: 'shejiyuanze',
      label: '设计原则',
      children: [{
       value: 'yizhi',
       label: '一致'
      }, {
       value: 'fankui',
       label: '反馈'
      }, {
       value: 'xiaolv',
       label: '效率'
      }, {
       value: 'kekong',
       label: '可控'
      }]
     }, {
      value: 'daohang',
      label: '导航',
      children: [{
       value: 'cexiangdaohang',
       label: '侧向导航'
      }, {
       value: 'dingbudaohang',
       label: '顶部导航'
      }]
     }]
    }, {
     value: 'zujian',
     label: '组件',
     children: [{
      value: 'basic',
      label: 'Basic',
      children: [{
       value: 'layout',
       label: 'Layout 布局'
      }, {
       value: 'color',
       label: 'Color 色彩'
      }, {
       value: 'typography',
       label: 'Typography 字体'
      }, {
       value: 'icon',
       label: 'Icon 图标'
      }, {
       value: 'button',
       label: 'Button 按钮'
      }]
     }, {
      value: 'form',
      label: 'Form',
      children: [{
       value: 'radio',
       label: 'Radio 单选框'
      }, {
       value: 'checkbox',
       label: 'Checkbox 多选框'
      }, {
       value: 'input',
       label: 'Input 输入框'
      }, {
       value: 'input-number',
       label: 'InputNumber 计数器'
      }, {
       value: 'select',
       label: 'Select 选择器'
      }, {
       value: 'cascader',
       label: 'Cascader 级联选择器'
      }, {
       value: 'switch',
       label: 'Switch 开关'
      }, {
       value: 'slider',
       label: 'Slider 滑块'
      }, {
       value: 'time-picker',
       label: 'TimePicker 时间选择器'
      }, {
       value: 'date-picker',
       label: 'DatePicker 日期选择器'
      }, {
       value: 'datetime-picker',
       label: 'DateTimePicker 日期时间选择器'
      }, {
       value: 'upload',
       label: 'Upload 上传'
      }, {
       value: 'rate',
       label: 'Rate 评分'
      }, {
       value: 'form',
       label: 'Form 表单'
      }]
     }, {
      value: 'data',
      label: 'Data',
      children: [{
       value: 'table',
       label: 'Table 表格'
      }, {
       value: 'tag',
       label: 'Tag 标签'
      }, {
       value: 'progress',
       label: 'Progress 进度条'
      }, {
       value: 'tree',
       label: 'Tree 树形控件'
      }, {
       value: 'pagination',
       label: 'Pagination 分页'
      }, {
       value: 'badge',
       label: 'Badge 标记'
      }]
     }, {
      value: 'notice',
      label: 'Notice',
      children: [{
       value: 'alert',
       label: 'Alert 警告'
      }, {
       value: 'loading',
       label: 'Loading 加载'
      }, {
       value: 'message',
       label: 'Message 消息提示'
      }, {
       value: 'message-box',
       label: 'MessageBox 弹框'
      }, {
       value: 'notification',
       label: 'Notification 通知'
      }]
     }, {
      value: 'navigation',
      label: 'Navigation',
      children: [{
       value: 'menu',
       label: 'NavMenu 导航菜单'
      }, {
       value: 'tabs',
       label: 'Tabs 标签页'
      }, {
       value: 'breadcrumb',
       label: 'Breadcrumb 面包屑'
      }, {
       value: 'dropdown',
       label: 'Dropdown 下拉菜单'
      }, {
       value: 'steps',
       label: 'Steps 步骤条'
      }]
     }, {
      value: 'others',
      label: 'Others',
      children: [{
       value: 'dialog',
       label: 'Dialog 对话框'
      }, {
       value: 'tooltip',
       label: 'Tooltip 文字提示'
      }, {
       value: 'popover',
       label: 'Popover 弹出框'
      }, {
       value: 'card',
       label: 'Card 卡片'
      }, {
       value: 'carousel',
       label: 'Carousel 走马灯'
      }, {
       value: 'collapse',
       label: 'Collapse 折叠面板'
      }]
     }]
    }, {
     value: 'ziyuan',
     label: '资源',
     children: [{
      value: 'axure',
      label: 'Axure Components'
     }, {
      value: 'sketch',
      label: 'Sketch Templates'
     }, {
      value: 'jiaohu',
      label: '组件交互文档'
     }]
    }]
   }
  }
 }
</script>

级联面板

<el-cascader-panel :options="options"></el-cascader-panel>

<script>
export default {
data() {
 return {
  options: [{
   value: 'zhinan',
   label: '指南',
   children: [{
    value: 'shejiyuanze',
    label: '设计原则',
    children: [{
     value: 'yizhi',
     label: '一致'
    }, {
     value: 'fankui',
     label: '反馈'
    }, {
     value: 'xiaolv',
     label: '效率'
    }, {
     value: 'kekong',
     label: '可控'
    }]
   }, {
    value: 'daohang',
    label: '导航',
    children: [{
     value: 'cexiangdaohang',
     label: '侧向导航'
    }, {
     value: 'dingbudaohang',
     label: '顶部导航'
    }]
   }]
  }, {
   value: 'zujian',
   label: '组件',
   children: [{
    value: 'basic',
    label: 'Basic',
    children: [{
     value: 'layout',
     label: 'Layout 布局'
    }, {
     value: 'color',
     label: 'Color 色彩'
    }, {
     value: 'typography',
     label: 'Typography 字体'
    }, {
     value: 'icon',
     label: 'Icon 图标'
    }, {
     value: 'button',
     label: 'Button 按钮'
    }]
   }, {
    value: 'form',
    label: 'Form',
    children: [{
     value: 'radio',
     label: 'Radio 单选框'
    }, {
     value: 'checkbox',
     label: 'Checkbox 多选框'
    }, {
     value: 'input',
     label: 'Input 输入框'
    }, {
     value: 'input-number',
     label: 'InputNumber 计数器'
    }, {
     value: 'select',
     label: 'Select 选择器'
    }, {
     value: 'cascader',
     label: 'Cascader 级联选择器'
    }, {
     value: 'switch',
     label: 'Switch 开关'
    }, {
     value: 'slider',
     label: 'Slider 滑块'
    }, {
     value: 'time-picker',
     label: 'TimePicker 时间选择器'
    }, {
     value: 'date-picker',
     label: 'DatePicker 日期选择器'
    }, {
     value: 'datetime-picker',
     label: 'DateTimePicker 日期时间选择器'
    }, {
     value: 'upload',
     label: 'Upload 上传'
    }, {
     value: 'rate',
     label: 'Rate 评分'
    }, {
     value: 'form',
     label: 'Form 表单'
    }]
   }, {
    value: 'data',
    label: 'Data',
    children: [{
     value: 'table',
     label: 'Table 表格'
    }, {
     value: 'tag',
     label: 'Tag 标签'
    }, {
     value: 'progress',
     label: 'Progress 进度条'
    }, {
     value: 'tree',
     label: 'Tree 树形控件'
    }, {
     value: 'pagination',
     label: 'Pagination 分页'
    }, {
     value: 'badge',
     label: 'Badge 标记'
    }]
   }, {
    value: 'notice',
    label: 'Notice',
    children: [{
     value: 'alert',
     label: 'Alert 警告'
    }, {
     value: 'loading',
     label: 'Loading 加载'
    }, {
     value: 'message',
     label: 'Message 消息提示'
    }, {
     value: 'message-box',
     label: 'MessageBox 弹框'
    }, {
     value: 'notification',
     label: 'Notification 通知'
    }]
   }, {
    value: 'navigation',
    label: 'Navigation',
    children: [{
     value: 'menu',
     label: 'NavMenu 导航菜单'
    }, {
     value: 'tabs',
     label: 'Tabs 标签页'
    }, {
     value: 'breadcrumb',
     label: 'Breadcrumb 面包屑'
    }, {
     value: 'dropdown',
     label: 'Dropdown 下拉菜单'
    }, {
     value: 'steps',
     label: 'Steps 步骤条'
    }]
   }, {
    value: 'others',
    label: 'Others',
    children: [{
     value: 'dialog',
     label: 'Dialog 对话框'
    }, {
     value: 'tooltip',
     label: 'Tooltip 文字提示'
    }, {
     value: 'popover',
     label: 'Popover 弹出框'
    }, {
     value: 'card',
     label: 'Card 卡片'
    }, {
     value: 'carousel',
     label: 'Carousel 走马灯'
    }, {
     value: 'collapse',
     label: 'Collapse 折叠面板'
    }]
   }]
  }, {
   value: 'ziyuan',
   label: '资源',
   children: [{
    value: 'axure',
    label: 'Axure Components'
   }, {
    value: 'sketch',
    label: 'Sketch Templates'
   }, {
    value: 'jiaohu',
    label: '组件交互文档'
   }]
  }]
 };
}
};
</script>

Cascader Attributes