From 984d582796f41f200d417b2d7647e9cb25b8dcec Mon Sep 17 00:00:00 2001
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 <67428053+kakkokari-gtyih@users.noreply.github.com>
Date: Sun, 7 Jul 2024 09:56:09 +0900
Subject: [PATCH] =?UTF-8?q?fix(frontend):=20=E3=82=B5=E3=83=BC=E3=83=90?=
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---
 packages/backend/src/server/web/boot.js | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/packages/backend/src/server/web/boot.js b/packages/backend/src/server/web/boot.js
index 396536948e..4275dc9527 100644
--- a/packages/backend/src/server/web/boot.js
+++ b/packages/backend/src/server/web/boot.js
@@ -29,7 +29,8 @@
 
 	let forceError = localStorage.getItem('forceError');
 	if (forceError != null) {
-		renderError('FORCED_ERROR', 'This error is forced by having forceError in local storage.')
+		renderError('FORCED_ERROR', 'This error is forced by having forceError in local storage.');
+		return;
 	}
 
 	//#region Detect language & fetch translations
@@ -155,7 +156,12 @@
 		document.head.appendChild(css);
 	}
 
-	function renderError(code, details) {
+	async function renderError(code, details) {
+		// Cannot set property 'innerHTML' of null を回避
+		if (document.readyState === 'loading') {
+			await new Promise(resolve => window.addEventListener('DOMContentLoaded', resolve));
+		}
+
 		let errorsElement = document.getElementById('errors');
 
 		if (!errorsElement) {
@@ -314,6 +320,6 @@
 			#errorInfo {
 				width: 50%;
 			}
-		`)
+		}`)
 	}
 })();