From 9b965a794d8e500fc0414f234f451a0c6b464984 Mon Sep 17 00:00:00 2001
From: Masahiro FUJIMOTO <mfujimot@gmail.com>
Date: Fri, 25 Jun 2021 01:17:20 +0900
Subject: Web/JavaScript/Reference/Errors/N* を更新 (#1202)
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* Web/JavaScript/Reference/Errors/N* を更新

2021/06/14 時点の英語版に同期

* 追加修正
---
 .../reference/errors/no_properties/index.html      | 24 ++++++++++++++--------
 1 file changed, 15 insertions(+), 9 deletions(-)

(limited to 'files/ja/web/javascript/reference/errors/no_properties/index.html')

diff --git a/files/ja/web/javascript/reference/errors/no_properties/index.html b/files/ja/web/javascript/reference/errors/no_properties/index.html
index d699a0767f..6630aee904 100644
--- a/files/ja/web/javascript/reference/errors/no_properties/index.html
+++ b/files/ja/web/javascript/reference/errors/no_properties/index.html
@@ -2,22 +2,26 @@
 title: 'TypeError: "x" has no properties'
 slug: Web/JavaScript/Reference/Errors/No_properties
 tags:
-  - Errors
-  - JavaScript
-  - TypeError
+- Error
+- Errors
+- JavaScript
+- TypeError
 translation_of: Web/JavaScript/Reference/Errors/No_properties
 ---
 <div>{{jsSidebar("Errors")}}</div>
 
-<h2 id="メッセージ">メッセージ</h2>
+<p>JavaScript の例外 "null (or undefined) has no properties" は、 {{jsxref("null")}} および {{jsxref("undefined")}} のプロパティにアクセスしようとしたときに発生します。これらには何もありません。They</p>
 
-<pre class="syntaxbox">TypeError: null has no properties
-TypeError: undefined has no properties
+<h2 id="Message">エラーメッセージ</h2>
+
+<pre class="brush: js">TypeError: Unable to get property {x} of undefined or null reference (Edge)
+TypeError: null has no properties (Firefox)
+TypeError: undefined has no properties (Firefox)
 </pre>
 
 <h2 id="エラータイプ">エラータイプ</h2>
 
-<p>{{jsxref("TypeError")}}。</p>
+<p>{{jsxref("TypeError")}}</p>
 
 <h2 id="何がうまくいかなかったのか？">何がうまくいかなかったのか？</h2>
 
@@ -25,6 +29,8 @@ TypeError: undefined has no properties
 
 <h2 id="例">例</h2>
 
+<h3 id="null_and_undefined_have_no_properties">null と undefined にはプロパティがない</h3>
+
 <pre class="brush: js example-bad">null.foo;
 // TypeError: null has no properties
 
@@ -35,6 +41,6 @@ undefined.bar;
 <h2 id="関連項目">関連項目</h2>
 
 <ul>
- <li>{{jsxref("null")}}</li>
- <li>{{jsxref("undefined")}}</li>
+  <li>{{jsxref("null")}}</li>
+  <li>{{jsxref("undefined")}}</li>
 </ul>
-- 
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