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author | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
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committer | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
commit | 33058f2b292b3a581333bdfb21b8f671898c5060 (patch) | |
tree | 51c3e392513ec574331b2d3f85c394445ea803c6 /files/zh-cn/web/api/performanceobserver/index.html | |
parent | 8b66d724f7caf0157093fb09cfec8fbd0c6ad50a (diff) | |
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diff --git a/files/zh-cn/web/api/performanceobserver/index.html b/files/zh-cn/web/api/performanceobserver/index.html new file mode 100644 index 0000000000..ca70398a68 --- /dev/null +++ b/files/zh-cn/web/api/performanceobserver/index.html @@ -0,0 +1,70 @@ +--- +title: 性能监测对象 +slug: Web/API/PerformanceObserver +tags: + - API + - 性能 + - 性能记录 + - 接口 +translation_of: Web/API/PerformanceObserver +--- +<div>{{APIRef("Performance Timeline API")}}</div> + +<div><strong><code>PerformanceObserver</code></strong> 用于监测性能度量事件,在浏览器的性能时间轴记录下一个新的 {{domxref("PerformanceEntry","performance entries", '', 'true')}} 的时候将会被通知 。</div> + +<div></div> + +<div>{{AvailableInWorkers}}</div> + +<h2 id="构造函数">构造函数</h2> + +<dl> + <dt>{{domxref("PerformanceObserver.PerformanceObserver","PerformanceObserver()")}}</dt> + <dd>创建并返回一个新的 <code>PerformanceObserver</code> 对象。</dd> +</dl> + +<h2 id="方法">方法</h2> + +<dl> + <dt>{{domxref("PerformanceObserver.observe","PerformanceObserver.observe()")}}</dt> + <dd>指定监测的 {{domxref("PerformanceEntry.entryType","entry types")}} 的集合。 当 {{domxref("PerformanceEntry","performance entry")}} 被记录并且是指定的 <code>entryTypes</code> 之一的时候,性能观察者对象的回调函数会被调用。</dd> + <dt>{{domxref("PerformanceObserver.disconnect","PerformanceObserver.disconnect()")}}</dt> + <dd>性能监测回调停止接收 {{domxref("PerformanceEntry","性能条目", '', 'true')}}。</dd> +</dl> + +<dl> +</dl> + +<h2 id="示例">示例</h2> + +<pre class="brush: js">function perf_observer(list, observer) { + // Process the "measure" event + // 处理 "measure" 事件 +} +var observer2 = new PerformanceObserver(perf_observer); +observer2.observe({entryTypes: ["measure"]});</pre> + +<h2 id="规范">规范</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">规范草案</th> + <th scope="col">状态</th> + <th scope="col">注释</th> + </tr> + <tr> + <td>{{SpecName('Performance Timeline Level 2', '#dom-performanceobserver', 'PerformanceObserver')}}</td> + <td>{{Spec2('Performance Timeline Level 2')}}</td> + <td><code>PerformanceObserver</code> 接口的初始定义</td> + </tr> + </tbody> +</table> + +<h2 id="浏览器兼容性">浏览器兼容性</h2> + +<div> +<div class="hidden">此页面上的兼容性表是根据结构化数据生成的。 如果您想为数据做出贡献,请查看https://github.com/mdn/browser-compat-data并向我们发送拉取请求。</div> + +<p>{{Compat("api.PerformanceObserver")}}</p> +</div> |