From 5f02765bb1ce1b601ff47d2b4c097b7f3f57eeb8 Mon Sep 17 00:00:00 2001
From: Hikaru Y <hkrysg@gmail.com>
Date: Thu, 11 May 2023 13:10:29 +0900
Subject: [PATCH] Fix custom font preloading sometimes not working (#2493)

It didn't work if both a reference to an external style sheet and
a description of a custom font are present in a style element.
---
 ts/reviewer/preload.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/ts/reviewer/preload.ts b/ts/reviewer/preload.ts
index 55942667d..72ae1b645 100644
--- a/ts/reviewer/preload.ts
+++ b/ts/reviewer/preload.ts
@@ -94,9 +94,9 @@ function preloadFonts(fragment: DocumentFragment): Promise<void>[] {
 export async function preloadResources(html: string): Promise<void> {
     template.innerHTML = html;
     const fragment = template.content;
-    const styleSheets = preloadStyleSheets(fragment);
-    const images = preloadImages(fragment);
-    const fonts = preloadFonts(fragment);
+    const styleSheets = preloadStyleSheets(fragment.cloneNode(true) as DocumentFragment);
+    const images = preloadImages(fragment.cloneNode(true) as DocumentFragment);
+    const fonts = preloadFonts(fragment.cloneNode(true) as DocumentFragment);
 
     let timeout: number;
     if (fonts.length) {