在此页

• 方法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

PerformanceObserverEntryList interface is a list of peformance events that were explicitly observed via the observe() 方法。

Note: this interface is exposed to Window and Worker .

方法

PerformanceObserverEntryList.getEntries()

Returns a list of explicitly observed PerformanceEntry objects based on the given filter .

PerformanceObserverEntryList.getEntriesByType()

Returns a list of explicitly observed PerformanceEntry objects of the given entry type .

PerformanceObserverEntryList.getEntriesByName()

Returns a list of explicitly observed PerformanceEntry objects based on the given name and entry type .

范例

// Create observer for all performance event types
// list is of type PerformanceObserveEntryList
var observe_all = new PerformanceObserver(function(list, obs) {
   var perfEntries = list.getEntries();
   for (var i = 0; i < perfEntries.length; i++) {
      print_perf_entry(perfEntries[i]);
      // do something with it
   }
})
					

规范

规范	状态	注释
Performance Timeline Level 2 The definition of 'PerformanceObserverEntryList' in that specification.	候选推荐	初始定义。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
PerformanceObserverEntryList	Chrome 52	Edge ≤79	Firefox 57	IE No	Opera 39	Safari 11	WebView Android No	Chrome Android 52	Firefox Android 57	Opera Android 41	Safari iOS 11	Samsung Internet Android 6.0
getEntries	Chrome 52	Edge ≤79	Firefox 57	IE No	Opera 39	Safari No	WebView Android No	Chrome Android 52	Firefox Android 57	Opera Android 41	Safari iOS No	Samsung Internet Android 6.0
getEntriesByName	Chrome 52	Edge ≤79	Firefox 57	IE No	Opera 39	Safari No	WebView Android No	Chrome Android 52	Firefox Android 57	Opera Android 41	Safari iOS No	Samsung Internet Android 6.0
getEntriesByType	Chrome 52	Edge ≤79	Firefox 57	IE No	Opera 39	Safari No	WebView Android No	Chrome Android 52	Firefox Android 57	Opera Android 41	Safari iOS No	Samsung Internet Android 6.0

图例

完整支持

完整支持

不支持

不支持

元数据

• 最后修改： Aug 12, 2020

相关话题

1. 性能时间线
2. PerformanceObserverEntryList
3. 方法

   1. getEntries()
   2. getEntriesByName()
   3. getEntriesByType()
4. Related pages for Performance Timeline API

   1. 性能
   2. PerformanceEntry
   3. PerformanceObserver
   4. PerformanceResourceTiming
   5. Window.performance