From 1f775774da7ef51ae8e690bbd86f94c739611a65 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=BF=A0=20/=20green?= <green@sapphi.red>
Date: Sun, 29 Jan 2023 18:23:26 +0900
Subject: [PATCH] feat(theme): preconnect algolia when idle (#1851)

---
 .../theme-default/components/VPNavBarSearch.vue  | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/client/theme-default/components/VPNavBarSearch.vue b/src/client/theme-default/components/VPNavBarSearch.vue
index f1e008ff..ae8d3304 100644
--- a/src/client/theme-default/components/VPNavBarSearch.vue
+++ b/src/client/theme-default/components/VPNavBarSearch.vue
@@ -78,6 +78,22 @@ function poll() {
     }
   }, 16)
 }
+
+onMounted(() => {
+  const id = 'VPAlgoliaPreconnect'
+
+  const rIC = requestIdleCallback || setTimeout
+  rIC(() => {
+    if (!theme.value.algolia || document.head.querySelector(`#${id}`)) return
+
+    const preconnect = document.createElement('link')
+    preconnect.id = id
+    preconnect.rel = 'preconnect'
+    preconnect.href = `https://${theme.value.algolia.appId}-dsn.algolia.net`
+    preconnect.crossOrigin = ''
+    document.head.appendChild(preconnect)
+  })
+})
 </script>
 
 <template>