124 lines
3.2 KiB
Markdown
124 lines
3.2 KiB
Markdown
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---
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category: Components
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subtitle: 面包屑
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type: 导航
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title: Breadcrumb
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cover: https://gw.alipayobjects.com/zos/alicdn/9Ltop8JwH/Breadcrumb.svg
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---
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显示当前页面在系统层级结构中的位置,并能向上返回。
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## 何时使用
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- 当系统拥有超过两级以上的层级结构时;
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- 当需要告知用户『你在哪里』时;
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- 当需要向上导航的功能时。
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## API
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| 参数 | 说明 | 类型 | 可选值 | 默认值 |
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| --- | --- | --- | --- | --- |
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| itemRender | 自定义链接函数,和 vue-router 配置使用, 也可使用 #itemRender="props" | ({route, params, routes, paths}) => vNode | | - |
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| params | 路由的参数 | object | | - |
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| routes | router 的路由栈信息 | [routes\[\]](#routes) | | - |
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| separator | 分隔符自定义 | string\|slot | | '/' |
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### Breadcrumb.Item
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| 参数 | 参数 | 类型 | 默认值 | 版本 |
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| ------- | -------------- | -------------------------------------- | ------ | ----- |
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| href | 链接的目的地 | string | - | 1.5.0 |
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| overlay | 下拉菜单的内容 | [Menu](/components/menu) \| () => Menu | - | 1.5.0 |
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#### 事件
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| 事件名称 | 说明 | 回调参数 | 版本 |
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| -------- | -------- | -------------------- | ---- |
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| click | 单击事件 | (e:MouseEvent)=>void | - | 1.5.0 |
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### Breadcrumb.Separator `1.5.0`
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| 参数 | 类型 | 默认值 | 版本 |
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| ---- | ---- | ------ | ---- |
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| - | - | - | - |
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> 注意:在使用 `Breadcrumb.Separator` 时,其父组件的分隔符必须设置为 `separator=""`,否则会出现父组件默认的分隔符。
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### routes
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```ts
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interface Route {
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path: string;
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breadcrumbName: string;
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children?: Array<{
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path: string;
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breadcrumbName: string;
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}>;
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}
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```
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### 和 browserHistory 配合
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和 vue-router 一起使用时,默认生成的 url 路径是带有 `#` 的,如果和 browserHistory 一起使用的话,你可以使用 `itemRender` 属性定义面包屑链接。
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```html
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<template>
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<a-breadcrumb :routes="routes">
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<template #itemRender="{ route, params, routes, paths }">
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<span v-if="routes.indexOf(route) === routes.length - 1">
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{{route.breadcrumbName}}
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</span>
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<router-link v-else :to="paths.join('/')">
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{{route.breadcrumbName}}
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</router-link>
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</template>
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</a-breadcrumb>
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</template>
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<script lang="ts">
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import { defineComponent, ref } from 'vue';
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interface Route {
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path: string;
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breadcrumbName: string;
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children?: Array<{
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path: string;
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breadcrumbName: string;
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}>;
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}
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export default defineComponent({
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setup () {
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const routes = ref<Route[]>([
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{
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path: 'index',
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breadcrumbName: 'home',
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},
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{
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path: 'first',
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breadcrumbName: 'first',
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children: [
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{
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path: '/general',
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breadcrumbName: 'General',
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},
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{
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path: '/layout',
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breadcrumbName: 'Layout',
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},
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{
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path: '/navigation',
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breadcrumbName: 'Navigation',
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},
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],
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},
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{
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path: 'second',
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breadcrumbName: 'second',
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},
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]);
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return {
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routes,
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}
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}
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});
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</script>
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```
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