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123 lines
3.2 KiB
123 lines
3.2 KiB
---
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category: Components
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type: Navigation
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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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A breadcrumb displays the current location within a hierarchy. It allows going back to states higher up in the hierarchy.
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## When To Use
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- When the system has more than two layers in a hierarchy.
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- When you need to inform the user of where they are.
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- When the user may need to navigate back to a higher level.
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## API
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| Property | Description | Type | Optional | Default | Version |
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| --- | --- | --- | --- | --- | --- |
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| itemRender | Custom item renderer, #itemRender="{route, params, routes, paths}" | ({route, params, routes, paths}) => vNode | | - | |
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| params | Routing parameters | object | | - | |
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| routes | The routing stack information of router | [routes\[\]](#routes) | | - | |
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| separator | Custom separator | string\|slot | | `/` | |
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### Breadcrumb.Item
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| Property | Description | Type | Default | Version |
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| --- | --- | --- | --- | --- |
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| href | Target of hyperlink | string | - | |
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| overlay | The dropdown menu | [Menu](/components/menu) \| () => Menu | - | |
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#### Events
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| Events Name | Description | Arguments | Version |
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| -------- | -------- | -------------------- | ---- |
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| click | handler to handle click event | (e:MouseEvent)=>void | - | 1.5.0 |
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### Breadcrumb.Separator `1.5.0`
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| Property | Description | Type | Default | Version |
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| -------- | ---------------- | --------- | ------- | ------- |
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| - | - | - | - | - |
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> When using `Breadcrumb.Separator`,its parent component must be set to `separator=""`, otherwise the default separator of the parent component will appear.
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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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### Use with browserHistory
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The link of Breadcrumb item targets `#` by default, you can use `itemRender` to make a `browserHistory` Link.
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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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