The domainLookupStart
read-only property returns the timestamp
immediately before the browser starts the domain name lookup for the resource.
Note: This feature is available in Web Workers
The domainLookupStart
read-only property returns the timestamp
immediately before the browser starts the domain name lookup for the resource.
Note: This feature is available in Web Workers
A DOMHighResTimeStamp
immediately before the browser starts the domain name lookup for the resource.
In the following example, the value of the *Start
and *End
properties of all "resource
" type
events are logged.
function print_PerformanceEntries() { // Use getEntriesByType() to just get the "resource" events var p = performance.getEntriesByType("resource"); for (var i=0; i < p.length; i++) { print_start_and_end_properties(p[i]); } } function print_start_and_end_properties(perfEntry) { // Print timestamps of the PerformanceEntry *start and *end properties properties = ["connectStart", "connectEnd", "domainLookupStart", "domainLookupEnd", "fetchStart", "redirectStart", "redirectEnd", "requestStart", "responseStart", "responseEnd", "secureConnectionStart"]; for (var i=0; i < properties.length; i++) { // check each property var supported = properties[i] in perfEntry; if (supported) { var value = perfEntry[properties[i]]; console.log("... " + properties[i] + " = " + value); } else { console.log("... " + properties[i] + " = NOT supported"); } } }
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
domainLookupStart |
43
|
12
|
31
|
10
|
30
|
11
|
43
|
43
|
31
|
30
|
11
|
4.0
|
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https://developer.mozilla.org/en-US/docs/Web/API/PerformanceResourceTiming/domainLookupStart