From 3453d5ad3d1a44e2947e2486d852b3e788b046b1 Mon Sep 17 00:00:00 2001
From: Dan Popescu <pdan.popescu@gmail.com>
Date: Fri, 7 Jun 2024 15:25:32 +0300
Subject: [PATCH] feat: improve vue-query example to show maximum rendering
 time on SSR #85

---
 examples/vue-query/pages/index/+Page.vue      | 54 ++--------------
 examples/vue-query/pages/index/MoviesList.vue | 64 +++++++++++++++++++
 examples/vue-query/tsconfig.json              |  2 +-
 3 files changed, 70 insertions(+), 50 deletions(-)
 create mode 100644 examples/vue-query/pages/index/MoviesList.vue

diff --git a/examples/vue-query/pages/index/+Page.vue b/examples/vue-query/pages/index/+Page.vue
index 05895751..8c99d092 100644
--- a/examples/vue-query/pages/index/+Page.vue
+++ b/examples/vue-query/pages/index/+Page.vue
@@ -1,25 +1,9 @@
 <template>
   <h1>Star Wars Movies</h1>
-  <ol>
-    <template v-if="isPending">
-      <li>Loading...</li>
-    </template>
-    <template v-else-if="isError">
-      <li>Error: {{ error }}</li>
-    </template>
-    <template v-else>
-      <li v-for="item in data!" :key="item.id">
-        {{ item.title }} ({{ item.release_date }})
-      </li>
-    </template>
-  </ol>
-  <p>Source: <a href="https://brillout.github.io/star-wars">brillout.github.io/star-wars</a>.</p>
-  <p>
-    While initial data is fetched on the server, the client will refresh after rendering.<br>
-    <code>
-      Refreshing: {{ isFetching ? 'Yes' : 'No' }}
-    </code>
-  </p>
+  <!-- put the suspensible components in Suspense -->
+  <Suspense>
+    <MoviesList />
+  </Suspense>
   <p>
   This page is:
   </p>
@@ -30,34 +14,6 @@
 </template>
 
 <script lang="ts" setup>
-import { onServerPrefetch } from 'vue'
-import type { Movie, MovieDetails } from './types'
-import { useQuery } from '@tanstack/vue-query'
 import Counter from '../../components/Counter.vue'
-
-const components = { Counter }
-
-const { isError, isPending, isFetching, data, error, suspense } = useQuery({
-  queryKey: ['movies'],
-  queryFn: fetchMovies,
-  select: (data) => minimize(data),
-})
-
-// this will be called on the server to prefetch the data
-onServerPrefetch(suspense)
-
-async function fetchMovies() {
-  const response = await fetch('https://brillout.github.io/star-wars/api/films.json')
-  const moviesData = (await response.json()) as MovieDetails[]
-  // simulate slow network on client
-  await new Promise((resolve) => setTimeout(resolve, import.meta.env.SSR ? 0 : 3000))
-  return moviesData
-}
-
-function minimize(movies: MovieDetails[]): Movie[] {
-  return movies.map((movie) => {
-    const { title, release_date, id } = movie
-    return { title, release_date, id }
-  })
-}
+import MoviesList from './MoviesList.vue'
 </script>
diff --git a/examples/vue-query/pages/index/MoviesList.vue b/examples/vue-query/pages/index/MoviesList.vue
new file mode 100644
index 00000000..84938963
--- /dev/null
+++ b/examples/vue-query/pages/index/MoviesList.vue
@@ -0,0 +1,64 @@
+<template>
+  <template v-if="isPending">
+    <p>Loading...</p>
+  </template>
+  <template v-else-if="isError">
+    <p>Error: {{ error }}</p>
+  </template>
+  <ol v-else>
+    <li v-for="item in data!" :key="item.id">
+      {{ item.title }} ({{ item.release_date }})
+    </li>
+  </ol>
+  <p>Source: <a href="https://brillout.github.io/star-wars">brillout.github.io/star-wars</a>.</p>
+  <p>
+    While initial data is fetched on the server, the client will refresh after rendering.<br>
+    <code>
+      Refreshing: {{ isFetching ? 'Yes' : 'No' }}
+    </code>
+  </p>
+</template>
+
+<script lang="ts" setup>
+import type { Movie, MovieDetails } from './types'
+import { useQuery } from '@tanstack/vue-query'
+
+const ALLOWED_SSR_DELAY = 300
+
+const { isError, isPending, isFetching, data, error, suspense } = useQuery({
+  queryKey: ['movies'],
+  queryFn: fetchMovies,
+  select: (data) => minimize(data),
+  staleTime: 3000
+})
+
+// await for `useQuery`'s `suspense` but only as much as you want to wait on SSR
+await new Promise(async (resolve) => {
+  setTimeout(() => {
+    resolve(false)
+  }, ALLOWED_SSR_DELAY)
+  await suspense()
+  resolve(true)
+})
+
+async function fetchMovies() {
+  const delay = Math.ceil(import.meta.env.SSR ? 2 * ALLOWED_SSR_DELAY * Math.random() : 500 + 3000 * Math.random())
+  console.log(`[${ import.meta.env.SSR ? 'SERVER' : 'CLIENT' }] Fetch movies network delay: ${ delay }${ import.meta.env.SSR && delay < ALLOWED_SSR_DELAY ? ' - PREFETCH' : ''}`)
+  const tsStart = Date.now()
+
+  const response = await fetch('https://brillout.github.io/star-wars/api/films.json')
+  const moviesData = (await response.json()) as MovieDetails[]
+
+  // simulate slow network on client
+  await new Promise((resolve) => setTimeout(resolve, Math.max(0, delay - Date.now() + tsStart)))
+
+  return moviesData;
+}
+
+function minimize(movies: MovieDetails[]): Movie[] {
+  return movies.map((movie) => {
+    const { title, release_date, id } = movie
+    return { title, release_date, id }
+  })
+}
+</script>
diff --git a/examples/vue-query/tsconfig.json b/examples/vue-query/tsconfig.json
index 542ade43..22634446 100644
--- a/examples/vue-query/tsconfig.json
+++ b/examples/vue-query/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     "strict": true,
-    "module": "ES2020",
+    "module": "ES2022",
     "moduleResolution": "Node",
     "target": "ES2020",
     "lib": ["DOM", "DOM.Iterable", "ESNext"],