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 | Status | Comment |
---|---|---|
Resource Timing Level 1 The definition of 'domainLookupEnd' in that specification. |
Candidate Recommendation | Initial definition. |
Browser compatibility
The compatibility table in 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.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
domainLookupEnd | Chrome Full support 43 | Edge Full support 12 | Firefox Full support 40 | IE No support No | Opera Full support 30 | Safari Full support 11 | WebView Android Full support 43 | Chrome Android Full support 43 | Firefox Android Full support 42 | Opera Android Full support 30 | Safari iOS Full support 11 | Samsung Internet Android Full support 4.0 |
Legend
- Full support
- Full support
- No support
- No support