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<script lang="ts">
import { defineComponent } from 'vue'
import { useQuery } from '@tanstack/vue-query'
import { experimental_createQueryPersister } from '@tanstack/query-persist-client-core'
import { Post } from './types'
const fetcher = async (): Promise<Post[]> =>
await fetch('https://jsonplaceholder.typicode.com/posts').then(
(response) =>
new Promise((resolve) =>
setTimeout(() => resolve(response.json()), 1000),
),
)
export default defineComponent({
name: 'PostsList',
props: {
isVisited: {
type: Function,
required: true,
},
},
emits: ['setPostId'],
setup() {
const {
isPending,
isError,
isFetching,
isRefetching,
data,
error,
refetch,
} = useQuery({
queryKey: ['posts'] as const,
queryFn: () => fetcher(),
persister: experimental_createQueryPersister({
storage: localStorage,
}).persisterFn,
staleTime: 5000,
})
return {
isPending,
isRefetching,
isError,
isFetching,
data,
error,
refetch,
}
},
})
</script>
<template>
<h1>Posts</h1>
<div v-if="isRefetching">Refetching...</div>
<div v-if="isPending">Loading...</div>
<div v-else-if="isError">An error has occurred: {{ error }}</div>
<div v-else-if="data">
<ul>
<li v-for="item in data" :key="item.id">
<a
@click="$emit('setPostId', item.id)"
href="#"
:class="{ visited: isVisited(item.id) }"
>{{ item.title }}</a
>
</li>
</ul>
</div>
</template>
<style scoped>
.visited {
font-weight: bold;
color: green;
}
</style>
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