keep-alive多级路由缓存该怎么实现呢
时间: 2023-09-08 13:07:33 浏览: 43
要实现 keep-alive 多级路由缓存,需要在父级路由中使用 keep-alive 组件,并在子级路由中设置 name 属性,以便 keep-alive 组件可以缓存子级路由对应的组件实例。同时,在子级路由对应的组件中也要添加 keep-alive 组件,以缓存子组件的状态。
下面是一个示例代码:
```javascript
// 父级路由设置
<template>
<div>
<keep-alive>
<router-view v-if="$route.meta.keepAlive" />
</keep-alive>
<router-view v-if="!$route.meta.keepAlive" />
</div>
</template>
<script>
export default {
name: 'Parent',
components: {},
data() {
return {};
},
computed: {},
methods: {}
};
</script>
// 子级路由设置
<template>
<div>
<keep-alive :include="cachedViews">
<router-view />
</keep-alive>
</div>
</template>
<script>
export default {
name: 'Child',
components: {},
data() {
return {};
},
computed: {
cachedViews() {
const { meta } = this.$route;
return meta && meta.keepAlive ? [meta.keepAlive] : [];
}
},
methods: {}
};
</script>
// 路由配置
const router = new VueRouter({
routes: [
{
path: '/',
name: 'Parent',
component: Parent,
meta: {
keepAlive: 'Parent'
},
children: [
{
path: '/child1',
name: 'Child1',
component: Child1,
meta: {
keepAlive: 'Child1'
},
children: [
{
path: '/grandchild1',
name: 'Grandchild1',
component: Grandchild1,
meta: {
keepAlive: 'Grandchild1'
}
},
{
path: '/grandchild2',
name: 'Grandchild2',
component: Grandchild2,
meta: {
keepAlive: 'Grandchild2'
}
}
]
},
{
path: '/child2',
name: 'Child2',
component: Child2,
meta: {
keepAlive: 'Child2'
}
}
]
}
]
});
```
在这个示例中,Parent 组件作为父级路由组件,使用了 keep-alive 组件来缓存子级路由对应的组件实例。而 Child 组件作为子级路由组件,则使用了自己的 keep-alive 组件来缓存子组件的状态。为了让 keep-alive 组件知道要缓存哪个组件,我们在 meta 属性中添加了一个 keepAlive 字段,用来标识组件的名称。