在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

这是 实验性技术
检查 浏览器兼容性表格 要小心谨慎在生产中使用这之前。

domContentLoadedEventStart 只读特性返回 timestamp representing the time value equal to the time immediately before the user agent fires the DOMContentLoaded event at the current document.

句法

perfEntry.domContentLoadedEventStart;
					

返回值

A timestamp representing the time value equal to the time immediately before the user agent fires the DOMContentLoaded event at the current document.

范例

The following example illustrates this property's usage.

function print_nav_timing_data() {
  // Use getEntriesByType() to just get the "navigation" events
  var perfEntries = performance.getEntriesByType("navigation");
  for (var i=0; i < perfEntries.length; i++) {
    console.log("= Navigation entry[" + i + "]");
    var p = perfEntries[i];
    // dom Properties
    console.log("DOM content loaded = " + (p.domContentLoadedEventEnd - p.domContentLoadedEventStart));
    console.log("DOM complete = " + p.domComplete);
    console.log("DOM interactive = " + p.interactive);
    // document load and unload time
    console.log("document load = " + (p.loadEventEnd - p.loadEventStart));
    console.log("document unload = " + (p.unloadEventEnd - p.unloadEventStart));
    // other properties
    console.log("type = " + p.type);
    console.log("redirectCount = " + p.redirectCount);
  }
}
					

规范

规范	状态	注释
Navigation Timing Level 2 The definition of 'domContentLoadedEventStart' in that specification.	工作草案	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
domContentLoadedEventStart	Chrome 57	Edge 12	Firefox 58	IE 不支持 No	Opera 44	Safari 不支持 No	WebView Android 57	Chrome Android 57	Firefox Android 58	Opera Android 43	Safari iOS 不支持 No	Samsung Internet Android 7.0

图例

完整支持

完整支持

不支持

不支持

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

元数据

• 最后修改： 2020 年 1 月 22 日

相关话题

1. 导航计时 API
2. PerformanceNavigationTiming
3. 特性

   1. domComplete
   2. domContentLoadedEventEnd
   3. domContentLoadedEventStart
   4. domInteractive
   5. loadEventEnd
   6. loadEventStart
   7. redirectCount
   8. type
   9. unloadEventEnd
   10. unloadEventStart
4. 方法

   1. toJSON()
5. 继承：

   1. PerformanceEntry
6. Related pages for Navigation Timing

   1. 性能
   2. PerformanceNavigation
   3. PerformanceTiming
   4. Window.performance