PerformanceNavigationTiming.domContentLoadedEventStart

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The domContentLoadedEventStart read-only property returns a timestamp representing the time value equal to the time immediately before the user agent fires the DOMContentLoaded event at the current document.

Syntax

perfEntry.domContentLoadedEventStart;

Return Value

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

Example

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);
  }
}

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
domContentLoadedEventStart
57
12
58
No
44
No
57
57
58
43
No
7.0

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https://developer.mozilla.org/en-US/docs/Web/API/PerformanceNavigationTiming/domContentLoadedEventStart