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element 级联选择器 Element-React Cascader 级联选择器

2023-05-08 05:20

element 级联选择器 Element-React Cascader 级联选择器

element 级联选择器 Element-React Cascader 级联选择器

element 级联选择器

当一个数据集合有清晰的层级结构时,可通过级联选择器逐级查看并选择。

基础用法

有两种触发子菜单的方式

只需为 Cascader 的options属性指定选项数组即可渲染出一个级联选择器。通过expandTrigger可以定义展开子级菜单的触发方式。本例还展示了onChange事件,它的参数为 Cascader 的绑定值:一个由各级菜单的值所组成的数组。

constructor(props) {
  super(props);


  this.state = {
    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"
      }]
    }],
    selectedOptions: [],
    selectedOptions2: []
  }
}


handleChange(key, value) {
  this.setState({ [key]: value });


  console.log(value);
}


render() {
  return (
    <div>
      <div className="block">
        <span className="demonstration">默认 click 触发子菜单</span>
        <Cascader
          options={this.state.options}
          value={this.state.selectedOptions}
          onChange={this.handleChange.bind(this, "selectedOptions")} />
      </div>
      <div className="block">
        <span className="demonstration">hover 触发子菜单</span>
        <Cascader
          options={this.state.options}
          expandTrigger="hover"
          value={this.state.selectedOptions2}
          onChange={this.handleChange.bind(this, "selectedOptions2")} />
      </div>
    </div>
  )
}

禁用选项

通过在数据源中设置 disabled 字段来声明该选项是禁用的

本例中,options指定的数组中的第一个元素含有disabled: true键值对,因此是禁用的。在默认情况下,Cascader 会检查数据中每一项的disabled字段是否为true,如果你的数据中表示禁用含义的字段名不为disabled,可以通过props属性来指定(详见下方 API 表格)。当然,valuelabelchildren这三个字段名也可以通过同样的方式指定。

constructor(props) {
  super(props);


  this.state = {
    optionsWithDisabled: [{
      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"
      }]
    }]
  };
}


render() {
  return (
    <Cascader
      options={this.state.optionsWithDisabled}
    />
  )
}

仅显示最后一级

可以仅在输入框中显示选中项最后一级的标签,而不是选中项所在的完整路径。

属性show-all-levels定义了是否显示完整的路径,将其赋值为false则仅显示最后一级

constructor(props) {
  super(props);


  this.state = {
    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"
      }]
    }]
  }
}


render() {
  return (
    <Cascader
      options={this.state.options}
      showAllLevels={false}
    />
  )
}

默认值

默认值通过数组的方式指定。

constructor(props) {
  super(props);


  this.state = {
    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"
      }]
    }],
    selectedOptions3: ["zujian", "data", "tag"]
  }
}


render() {
  return (
    <Cascader
      options={this.state.options}
      value={this.state.selectedOptions3}
    />
  )
}

选择即改变

点击或移入选项即表示选中该项,可用于选择任意一级菜单的选项。

若需要允许用户选择任意一级选项,则可将change-on-select赋值为true

constructor(props) {
  super(props);


  this.state = {
    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"
      }]
    }]
  };
}


render() {
  return (
    <Cascader
      options={this.state.options}
      changeOnSelect={true}
    />
  )
}

动态加载次级选项

当选中某一级时,动态加载该级下的选项。

本例的选项数据源在初始化时不包含城市数据。利用active-item-change事件,可以在用户点击某个省份时拉取该省份下的城市数据。此外,本例还展示了props属性的用法。

constructor(props) {
  super(props);


  this.state = {
    options2: [{
      label: "江苏",
      cities: []
    }, {
      label: "浙江",
      cities: []
    }],
    props: {
      value: "label",
      children: "cities"
    }
  };
}


handleItemChange(val) {
  console.log("active item:", val);


  setTimeout(() => {
    if (val.indexOf("江苏") > -1 && !this.state.options2[0].cities.length) {
      this.state.options2[0].cities = [{
        label: "南京"
      }];
    } else if (val.indexOf("浙江") > -1 && !this.state.options2[1].cities.length) {
      this.state.options2[1].cities = [{
        label: "杭州"
      }];
    }


    this.forceUpdate();
  }, 300);
}


render() {
  return (
    <Cascader
      props={this.state.props}
      options={this.state.options2}
      activeItemChange={this.handleItemChange.bind(this)}
    />
  )
}

可搜索

可以快捷地搜索选项并选择。

filterable赋值为true即可打开搜索功能。

constructor(props) {
  super(props);


  this.state = {
    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"
      }]
    }]
  }
}


render() {
  return (
    <div>
      <div className="block">
        <span className="demonstration">只可选择最后一级菜单的选项</span>
        <Cascader
          placeholder="试试搜索:指南"
          options={this.state.options}
          filterable={true}
        />
      </div>
      <div className="block">
        <span className="demonstration">可选择任意一级菜单的选项</span>
        <Cascader
          placeholder="试试搜索:指南"
          options={this.state.options}
          filterable={true}
          changeOnSelect={true}
        />
      </div>
    </div>
  )
}

隐藏代码

Attributes

参数 说明 类型 可选值 默认值
options 可选项数据源,键名可通过 props 属性配置 array
props 配置选项,具体见下表 object
value 选中项绑定值 array
popperClass 自定义浮层类名 string
placeholder 输入框占位文本 string 请选择
disabled 是否禁用 boolean false
clearable 是否支持清空选项 boolean false
expandTrigger 次级菜单的展开方式 string click / hover click
showAllLevels 输入框中是否显示选中值的完整路径 boolean true
filterable 是否可搜索选项 boolean
debounce 搜索关键词输入的去抖延迟,毫秒 number 300
changeOnSelect 是否允许选择任意一级的选项 boolean false
size 尺寸 string large / small / mini
beforeFilter 可选参数, 筛选之前的钩子,参数为输入的值,若返回 false 或者返回 Promise 且被 reject,则停止筛选。 function(value)

props

参数 说明 类型 可选值 默认值
value 指定选项的值为选项对象的某个属性值 string
label 指定选项标签为选项对象的某个属性值 string
children 指定选项的子选项为选项对象的某个属性值 string
disabled 指定选项的禁用为选项对象的某个属性值 string

Events

事件名称 说明 回调参数
change 当绑定值变化时触发的事件 当前值
activeItemChange 当父级选项变化时触发的事件,仅在 change-on-select 为 false 时可用 各父级选项组成的数组
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