The PerformanceTiming.domainLookupStart read-only property returns an unsigned long long representing the moment, in miliseconds since the UNIX epoch, where the domain lookup starts. If a persistent connection is used, or the information is stored in a cache or a local resource, the value will be the same as PerformanceTiming.fetchStart.
time = performanceTiming.domainLookupStart;
| Specification | Status | Comment |
|---|---|---|
| Navigation Timing The definition of 'PerformanceTiming.domainLookupStart' in that specification. | Recommendation | Initial definition. |
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|---|
| Basic support | 6.0 | (Yes) | 7.0 (7.0) | 9.0 | 15.0 | No support |
| Feature | Android | Edge | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
| Basic support | No support | (Yes) | 7.0 (7.0) | 1.0 (7.0) | 9.0 | 15.0 | No support |
PerformanceTiming interface it belongs to.
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https://developer.mozilla.org/en-US/docs/Web/API/PerformanceTiming/domainLookupStart