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---
title: PerformanceTiming.secureConnectionStart
slug: Web/API/PerformanceTiming/secureConnectionStart
translation_of: Web/API/PerformanceTiming/secureConnectionStart
---
<p>{{APIRef("Navigation Timing")}}</p>
<h2 id="概要">概要</h2>
<p><code><strong>PerformanceTiming</strong></code><strong><code>.secureConnectionStart</code></strong> 是一个返回代表一个时刻的 <code>unsigned long long</code> 型只读属性，为安全连接握手开始的时刻的 Unix毫秒时间戳。如果只要你过的连接没有被请求，则它返回 0。</p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox"><em>time</em> = <em>performanceTiming</em>.secureConnectionStart;</pre>
<h2 id="标准">标准</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('Navigation Timing', '#dom-performancetiming-secureconnectionstart', 'PerformanceTiming.secureConnectionStart')}}</td>
<td>{{Spec2('Navigation Timing')}}</td>
<td>Initial definition.</td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<div>
<div>
<p>{{Compat("api.PerformanceTiming.secureConnectionStart")}}</p>
</div>
</div>
<h2 id="参见">参见</h2>
<ul>
<li>它属于 {{domxref("PerformanceTiming")}} 接口。</li>
</ul>
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