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'use client'
import { isServer, useSuspenseQuery } from '@tanstack/react-query'
import { Suspense } from 'react'
export const runtime = 'edge' // 'nodejs' (default) | 'edge'
function getBaseURL() {
if (!isServer) {
return ''
}
if (process.env.VERCEL_URL) {
return `https://${process.env.VERCEL_URL}`
}
return 'http://localhost:3000'
}
const baseUrl = getBaseURL()
function useWaitQuery(props: { wait: number }) {
const query = useSuspenseQuery({
queryKey: ['wait', props.wait],
queryFn: async () => {
const path = `/api/wait?wait=${props.wait}`
const url = baseUrl + path
const res: string = await (
await fetch(url, {
cache: 'no-store',
})
).json()
return res
},
})
return [query.data as string, query] as const
}
function MyComponent(props: { wait: number }) {
const [data] = useWaitQuery(props)
return <div>result: {data}</div>
}
export default function MyPage() {
return (
<>
<Suspense fallback={<div>waiting 100....</div>}>
<MyComponent wait={100} />
</Suspense>
<Suspense fallback={<div>waiting 200....</div>}>
<MyComponent wait={200} />
</Suspense>
<Suspense fallback={<div>waiting 300....</div>}>
<MyComponent wait={300} />
</Suspense>
<Suspense fallback={<div>waiting 400....</div>}>
<MyComponent wait={400} />
</Suspense>
<Suspense fallback={<div>waiting 500....</div>}>
<MyComponent wait={500} />
</Suspense>
<Suspense fallback={<div>waiting 600....</div>}>
<MyComponent wait={600} />
</Suspense>
<Suspense fallback={<div>waiting 700....</div>}>
<MyComponent wait={700} />
</Suspense>
<fieldset>
<legend>
combined <code>Suspense</code>-container
</legend>
<Suspense
fallback={
<>
<div>waiting 800....</div>
<div>waiting 900....</div>
<div>waiting 1000....</div>
</>
}
>
<MyComponent wait={800} />
<MyComponent wait={900} />
<MyComponent wait={1000} />
</Suspense>
</fieldset>
</>
)
}
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