Cascader 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props.expandTrigger可以定义展开子级菜单的触发方式。
<template>
<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="props"
@change="handleChange"
></el-cascader>
</div>
</template>
<script>
export default {
data() {
return {
value: [],
props: { expandTrigger: hover },
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
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.disabled属性来指定（详见下方 API 表格）。当然，value、label和children这三个字段名也可以通过同样的方式指定。
<template>
<el-cascader :options="options"></el-cascader>
</template>
<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
通过 clearable 设置输入框可清空
<template>
<el-cascader :options="options" clearable></el-cascader>
</template>
<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
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
<template>
<el-cascader :options="options" :show-all-levels="false"></el-cascader>
</template>
<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
可通过 props.multiple = true 来开启多选模式
在开启多选模式后，默认情况下会展示所有已选中的选项的 Tag，你可以使用collapse-tags来折叠 Tag
<template>
<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>
</template>
<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
在单选模式下，你只能选择叶子节点；而在多选模式下，勾选父节点真正选中的都是叶子节点。启用该功能后，可让父子节点取消关联，选择任意一级选项。
可通过 props.checkStrictly = true 来设置父子节点取消选中关联，从而达到选择任意一级选项的目的。
<template>
<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>
</template>
<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
当选中某一级时，动态加载该级下的选项。
通过lazy开启动态加载，并通过lazyload来设置加载数据源的方法。lazyload方法有两个参数，第一个参数node为当前点击的节点，第二个resolve为数据加载完成的回调(必须调用)。为了更准确的显示节点的状态，还可以对节点数据添加是否为叶子节点的标志位 (默认字段为leaf，可通过props.leaf修改)，否则会简单的以有无子节点来判断是否为叶子节点。
<template>
<el-cascader :props="props"></el-cascader>
</template>
<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)
},
},
}
},
}
</script>
可搜索
可以快捷地搜索选项并选择。
将filterable赋值为true即可打开搜索功能，默认会匹配节点的label或所有父节点的label(由show-all-levels决定)中包含输入值的选项。你也可以用filter-method自定义搜索逻辑，接受一个函数，第一个参数是节点node，第二个参数是搜索关键词keyword，通过返回布尔值表示是否命中。
<template>
<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>
</template>
<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
可以自定义备选项的节点内容
可以通过scoped slot对级联选择器的备选项的节点内容进行自定义，scoped slot 会传入两个字段 node 和 data，分别表示当前节点的 Node 对象和数据。
<template>
<el-cascader :options="options">
<template #default="{ node, data }">
<span>{{ data.label }}</span>
<span v-if="!node.isLeaf"> ({{ data.children.length }}) </span>
</template>
</el-cascader>
</template>
<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
级联面板是级联选择器的核心组件，与级联选择器一样，有单选、多选、动态加载等多种功能。
和级联选择器一样，通过options来指定选项，也可通过props来设置多选、动态加载等功能，具体详情见下方 API 表格。
<template>
<el-cascader-panel :options="options"></el-cascader-panel>
</template>
<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
| 参数 | 说明 | 类型 | 可选值 | 默认值 |
|---|---|---|---|---|
| model-value / v-model | 选中项绑定值 | – | — | — |
| 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 | — | — |
| size | 尺寸 | string | medium / small / mini | — |
| 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 |
| show-all-levels | 输入框中是否显示选中值的完整路径 | boolean | — | true |
| collapse-tags | 多选模式下是否折叠 Tag | boolean | – | false |
| separator | 选项分隔符 | string | — | 斜杠 / |
| filterable | 是否可搜索选项 | boolean | — | — |
| filter-method | 自定义搜索逻辑，第一个参数是节点node，第二个参数是搜索关键词keyword，通过返回布尔值表示是否命中 | function(node, keyword) | – | – |
| debounce | 搜索关键词输入的去抖延迟，毫秒 | number | — | 300 |
| before-filter | 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) | — | — |
| popper-class | 自定义浮层类名 | string | — | — |
| popper-append-to-body | 是否将弹出框插入至 body 元素。在弹出框的定位出现问题时，可将该属性设置为 false | boolean | – | true |
Cascader Events
| 事件名称 | 说明 | 回调参数 |
|---|---|---|
| change | 当选中节点变化时触发 | 选中节点的值 |
| expand-change | 当展开节点发生变化时触发 | 各父级选项值组成的数组 |
| blur | 当失去焦点时触发 | (event: Event) |
| focus | 当获得焦点时触发 | (event: Event) |
| visible-change | 下拉框出现/隐藏时触发 | 出现则为 true，隐藏则为 false |
| remove-tag | 在多选模式下，移除 Tag 时触发 | 移除的 Tag 对应的节点的值 |
Cascader Methods
| 方法名 | 说明 | 参数 |
|---|---|---|
| getCheckedNodes | 获取选中的节点 | (leafOnly) 是否只是叶子节点，默认值为 false |
Cascader Slots
| 名称 | 说明 |
|---|---|
| – | 自定义备选项的节点内容，参数为 { node, data }，分别为当前节点的 Node 对象和数据 |
| empty | 无匹配选项时的内容 |
CascaderPanel Attributes
| 参数 | 说明 | 类型 | 可选值 | 默认值 |
|---|---|---|---|---|
| model-value / v-model | 选中项绑定值 | – | — | — |
| 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 | — | — |
CascaderPanel Events
| 事件名称 | 说明 | 回调参数 |
|---|---|---|
| change | 当选中节点变化时触发 | 选中节点的值 |
| expand-change | 当展开节点发生变化时触发 | 各父级选项值组成的数组 |
CascaderPanel Methods
| 方法名 | 说明 | 参数 |
|---|---|---|
| getCheckedNodes | 获取选中的节点数组 | (leafOnly) 是否只是叶子节点，默认值为 false |
| clearCheckedNodes | 清空选中的节点 | – |
CascaderPanel Slots
| 名称 | 说明 |
|---|---|
| – | 自定义备选项的节点内容，参数为 { node, data }，分别为当前节点的 Node 对象和数据 |
Props
| 参数 | 说明 | 类型 | 可选值 | 默认值 |
|---|---|---|---|---|
| expandTrigger | 次级菜单的展开方式 | string | click / hover | click |
| multiple | 是否多选 | boolean | – | false |
| checkStrictly | 是否严格的遵守父子节点不互相关联 | boolean | – | false |
| emitPath | 在选中节点改变时，是否返回由该节点所在的各级菜单的值所组成的数组，若设置 false，则只返回该节点的值 | boolean | – | true |
| lazy | 是否动态加载子节点，需与 lazyLoad 方法结合使用 | boolean | – | false |
| lazyLoad | 加载动态数据的方法，仅在 lazy 为 true 时有效 | function(node, resolve)，node为当前点击的节点，resolve为数据加载完成的回调(必须调用) | – | – |
| value | 指定选项的值为选项对象的某个属性值 | string | — | value |
| label | 指定选项标签为选项对象的某个属性值 | string | — | label |
| children | 指定选项的子选项为选项对象的某个属性值 | string | — | children |
| disabled | 指定选项的禁用为选项对象的某个属性值 | string | — | disabled |
| leaf | 指定选项的叶子节点的标志位为选项对象的某个属性值 | string | — | leaf |
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