PerformanceResourceTiming.domainLookupEnd
The domainLookupEnd
read-only property returns the
timestamp
immediately after the browser finishes
the domain name lookup for the resource.
If the user agent has the domain information in cache,
domainLookupStart
and
domainLookupEnd
represent the
times when the user agent starts and ends the domain data retrieval from the cache.
Note: This feature is available in Web Workers
Syntax
resource.domainLookupEnd;
Return value
A DOMHighResTimeStamp
representing the time immediately after the
browser finishes the domain name lookup for the resource.
Example
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 *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");
}
}
}
Specifications
Specification |
---|
Resource Timing Level 2 # dom-performanceresourcetiming-domainlookupend |
Browser compatibility
BCD tables only load in the browser