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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: PerformanceEntry.name
+slug: Web/API/PerformanceEntry/name
+tags:
+ - API
+ - Web パフォーマンス
+ - プロパティ
+ - リファレンス
+translation_of: Web/API/PerformanceEntry/name
+---
+<div>{{APIRef("Performance Timeline API")}}</div>
+
+<p><span class="seoSummary">{{domxref("PerformanceEntry")}} インターフェイスの <strong><code>name</code></strong> プロパティは、{{domxref("PerformanceEntry.entryType")}} プロパティによって返される値をさらに指定する値を返します。このプロパティは読み取り専用です。</span></p>
+
+<p>{{AvailableInWorkers}}</p>
+
+<h2 id="Syntax" name="Syntax">構文</h2>
+
+<pre class="syntaxbox">var<em> name</em> = <em>entry</em>.name;
+</pre>
+
+<h3 id="Return_Value" name="Return_Value">戻り値</h3>
+
+<p>以下の表に示すように、戻り値は <code>PerformanceEntry</code> オブジェクトのサブタイプと {{domxref("PerformanceEntry.entryType")}} の値によって異なります。</p>
+
+<table class="standard-table">
+ <thead>
+ <tr>
+ <th scope="col">値</th>
+ <th scope="col">サブタイプ</th>
+ <th scope="col">entryType の値</th>
+ <th scope="col">説明</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td>{{domxref("URL")}}</td>
+ <td>{{domxref('PerformanceFrameTiming')}}, {{domxref('PerformanceNavigationTiming')}}</td>
+ <td><code>frame</code>, <code>navigation</code></td>
+ <td>ドキュメントのアドレス</td>
+ </tr>
+ <tr>
+ <td>{{domxref("URL")}}</td>
+ <td>{{domxref('PerformanceResourceTiming')}}</td>
+ <td><code>resource</code></td>
+ <td>リクエストされたリソースの解決されたURL。リクエストがリダイレクトされても、この値は変わりません。</td>
+ </tr>
+ <tr>
+ <td>{{domxref("DOMString")}}</td>
+ <td>{{domxref('PerformanceMark')}}</td>
+ <td><code>mark</code></td>
+ <td>{{domxref("Performance.mark","performance.mark()")}} を呼び出してマークを作成したときに使用された名前。</td>
+ </tr>
+ <tr>
+ <td>{{domxref("DOMString")}}</td>
+ <td>{{domxref('PerformanceMeasure')}}</td>
+ <td><code>measure</code></td>
+ <td>メジャーが {{domxref("Performance.measure","performance.measure()")}} を呼び出して作成されたときに使用された名前。</td>
+ </tr>
+ <tr>
+ <td>{{domxref("DOMString")}}</td>
+ <td>{{domxref('PerformancePaintTiming')}}</td>
+ <td><code>paint</code></td>
+ <td><code>'first-paint'</code> もしくは <code>'first-contentful-paint'</code> のいずれか</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="例">例</h2>
+
+<p>次の例は、<code>name</code> プロパティの使い方を示しています。</p>
+
+<pre class="brush: js">function run_PerformanceEntry() {
+ log("PerformanceEntry support ...");
+
+ if (performance.mark === undefined) {
+ log("... performance.mark Not supported");
+ return;
+ }
+
+ // Create some performance entries via the mark() method
+ performance.mark("Begin");
+ do_work(50000);
+ performance.mark("End");
+
+ // Use getEntries() to iterate through the each entry
+ var p = performance.getEntries();
+ for (var i=0; i &lt; p.length; i++) {
+ log("Entry[" + i + "]");
+ check_PerformanceEntry(p[i]);
+ }
+}
+function check_PerformanceEntry(obj) {
+ var properties = ["name", "entryType", "startTime", "duration"];
+ var methods = ["toJSON"];
+
+ for (var i=0; i &lt; properties.length; i++) {
+ // check each property
+ var supported = properties[i] in obj;
+ if (supported)
+ log("..." + properties[i] + " = " + obj[properties[i]]);
+ else
+ log("..." + properties[i] + " = Not supported");
+ }
+ for (var i=0; i &lt; methods.length; i++) {
+ // check each method
+ var supported = typeof obj[methods[i]] == "function";
+ if (supported) {
+ var js = obj[methods[i]]();
+ log("..." + methods[i] + "() = " + JSON.stringify(js));
+ } else {
+ log("..." + methods[i] + " = Not supported");
+ }
+ }
+}
+</pre>
+
+<h2 id="仕様">仕様</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">仕様書</th>
+ <th scope="col">ステータス</th>
+ <th scope="col">コメント</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('Performance Timeline Level 2', '#dom-performanceentry-name', 'name')}}</td>
+ <td>{{Spec2('Performance Timeline Level 2')}}</td>
+ <td> </td>
+ </tr>
+ <tr>
+ <td>{{SpecName('Performance Timeline', '#dom-performanceentry-name', 'name')}}</td>
+ <td>{{Spec2('Performance Timeline')}}</td>
+ <td>初期定義</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="ブラウザの互換性">ブラウザの互換性</h2>
+
+<div>
+
+
+<p>{{Compat("api.PerformanceEntry.name")}}</p>
+</div>