---
title: PerformanceEntry.name
slug: Web/API/PerformanceEntry/name
translation_of: Web/API/PerformanceEntry/name
---
<div>{{APIRef("Performance Timeline API")}}</div>

<p><span class="seoSummary"><strong><code>name 是</code></strong> {{domxref("PerformanceEntry")}} 接口的属性，此属性的返回值是 {{domxref("PerformanceEntry.entryType")}} 的返回值的一个补充，例如entry.entryType="navigation",entry.name="document". 这是一个只读属性.</span></p>

<h2 id="Syntax" name="Syntax">Syntax</h2>

<pre class="syntaxbox">var<em> name</em> = <em>entry</em>.name;
</pre>

<h3 id="Return_Value" name="Return_Value">返回值</h3>

<p>返回值取决于<code>PerformanceEntry</code> 对象的 subtype和{{domxref("PerformanceEntry.entryType")}}的值, 如下表所示.</p>

<table class="standard-table">
 <thead>
  <tr>
   <th scope="col">Value</th>
   <th scope="col">Subtype</th>
   <th scope="col">entryType values</th>
   <th scope="col">Description</th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td>{{domxref("URL")}}</td>
   <td>{{domxref('PerformanceFrameTiming')}}, {{domxref('PerformanceNavigationTiming')}}</td>
   <td><code>frame</code>, <code>navigation</code></td>
   <td>The document's address.</td>
  </tr>
  <tr>
   <td>{{domxref("URL")}}</td>
   <td>{{domxref('PerformanceResourceTiming')}}</td>
   <td><code>resource</code></td>
   <td>The resolved URL of the requested resource. This value doesn't change even if the request is redirected.</td>
  </tr>
  <tr>
   <td>{{domxref("DOMString")}}</td>
   <td>{{domxref('PerformanceMark')}}</td>
   <td><code>mark</code></td>
   <td>The name used when the mark was created by calling {{domxref("Performance.mark","performance.mark()")}}.</td>
  </tr>
  <tr>
   <td>{{domxref("DOMString")}}</td>
   <td>{{domxref('PerformanceMeasure')}}</td>
   <td><code>measure</code></td>
   <td>name used when the measure was created by calling {{domxref("Performance.measure","performance.measure()")}}.</td>
  </tr>
  <tr>
   <td>{{domxref("DOMString")}}</td>
   <td>{{domxref('PerformancePaintTiming')}}</td>
   <td><code>paint</code></td>
   <td>Either <code>'first-paint'</code> or <code>'first-contentful-paint'</code>.</td>
  </tr>
 </tbody>
</table>

<h2 id="用例">用例</h2>

<p>下面的例子是 <code>name</code> 属性的用法.</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]);
  }
}
  //
  //例如上面p中一个entry p[0] = {
  //  "name": "document",
  //  "entryType": "navigation",
  //  "startTime": 0,
  //  "duration": 3611.26,
  //  "initiatorType": "navigation",
  //  "nextHopProtocol": "http/1.1",
  //  "workerStart": 0,
  //  "redirectStart": 0,
  //  "redirectEnd": 0,
  //  "fetchStart": 0.32,
  //  "domainLookupStart": 17.64,
  //  "domainLookupEnd": 17.78,
  //  "connectStart": 17.86,
  //  "connectEnd": 18.1,
  //  "secureConnectionStart": 0,
  //  "requestStart": 18.3,
  //  "responseStart": 294.06,
  //  "responseEnd": 1610.3600000000001,
  //  "transferSize": 97683,
  //  "encodedBodySize": 97112,
  //  "decodedBodySize": 97112,
  //  "unloadEventStart": 1614.8372840721554,
  //  "unloadEventEnd": 1619.1600105887128,
  //  "domInteractive": 3110.767514889843,
  //  "domContentLoadedEventStart": 3125.859851800787,
  //  "domContentLoadedEventEnd": 3438.5779820633365,
  //  "domComplete": 3609.999662153349,
  //  "loadEventStart": 3610.017623620869,
  //  "loadEventEnd": 3611.2672285754975,
  //  "type": "reload",
  //  "redirectCount": 0
  //}

  //下面的函数check_PerformanceEntry的参数obj就是上面的p[0]
  //
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="Specifications">Specifications</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</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>Initial definition.</td>
  </tr>
 </tbody>
</table>

<h2 id="Browser_compatibility">Browser compatibility</h2>

<div>
<div>


<p>{{Compat("api.PerformanceEntry.name")}}</p>
</div>
</div>