vue3(setup) keep-alive 列表页跳转详情缓存，跳转其它更新

jinxi11122024-10-31 12:26

app.vue（或其它入口页）使用keep-alive的include动态设置缓存

注意：有嵌套的页面需要在嵌套内部的router-view上添加keep-alive

javascript 复制代码

<template>
    <router-view v-slot="{ Component}">
        <keep-alive :include="cacheList">
          <component :is="Component" />
        </keep-alive>
     </router-view>
</template>
<script setup lang="ts">
import { cacheStore } from "@/stores";
const store = cacheStore();
// 在store中定义一个cacheList用在存放缓存页面
const cacheList = computed(() => {
    return store.cacheList;
});
</script>

stores的index.ts：使用pinia调控缓存页面的数组

javascript 复制代码

import { defineStore } from "pinia";
import { cacheState } from './types';
const cacheStore = defineStore("cache", {
    state: (): cacheState => ({
        cacheList:[] // keep-alive缓存列表
    }),
    actions: {
        pushCaches(item:string) {
            let set = new Set(this.cacheList);
            set.add(item);
            this.cacheList = Array.from(set);
        },
        popCaches(item:string) {
            let set = new Set(this.cacheList);
            if (set.has(item)) {
                set.delete(item);
            }
            this.cacheList = Array.from(set);
        },
    },
});
export default cacheStore;

list.vue（列表页）

注意：vue3的setup模式使用defineOptions为页面路由命名

javascript 复制代码

<script lang="ts" setup>
import { ref } from "vue";
import { onBeforeRouteLeave} from "vue-router";
import { cacheStore } from "@/stores";
const store = cacheStore();
//路由命名（非组件名）
defineOptions({ name: "list" });
//离开页面守卫
onBeforeRouteLeave((to, _from, next) => {
    // 若跳转的是详情页缓存本页面，否则清除本页缓存
    if (to.name === "detail") {
        store.pushCaches("list");
    } else {
        store.popCaches("list");
    }
    next();
});
</script>

detail.vue（详情页）

javascript 复制代码

<script lang="ts" setup>
//路由命名
defineOptions({ name: "detail" });
</script>