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Avoid using this feature in new projects.
This feature is supserseded by the PerformanceNavigationTiming API.
This feature may be a candidate for removal from web standards or browsers.
Consider using the following features instead: Performance or Navigation timing performance entries.
Warning:
This interface of this property is deprecated in the Navigation Timing Level 2 specification. Please use the PerformanceNavigationTiming
interface instead.
The legacy
PerformanceTiming.domContentLoadedEventStart
read-only property returns an unsigned long long representing the moment,
in milliseconds since the UNIX epoch, right before the parser sent the
DOMContentLoaded event, that is right after all the scripts that need to be
executed right after parsing has been executed.
An unsigned long long.
| Specification |
|---|
| Navigation Timing Level 2 # dom-performancetiming-domcontentloadedeventstart |
PerformanceTiming interface it belongs to.This page was last modified on Aug 21, 2026 by MDN contributors.
PerformanceTimingconnectEndconnectStartdomainLookupEnddomainLookupStartdomCompletedomContentLoadedEventEnddomContentLoadedEventStartdomInteractivedomLoadingfetchStartloadEventEndloadEventStartnavigationStartredirectEndredirectStartrequestStartresponseEndresponseStartsecureConnectionStartunloadEventEndunloadEventStartEventCountsInteractionContentfulPaintLargestContentfulPaintLayoutShiftLayoutShiftAttributionNotRestoredReasonDetailsNotRestoredReasonsPerformancePerformanceElementTimingPerformanceEntryPerformanceEventTimingPerformanceLongAnimationFrameTimingPerformanceLongTaskTimingPerformanceMarkPerformanceMeasurePerformanceNavigationPerformanceNavigationTimingPerformanceObserverPerformanceObserverEntryListPerformancePaintTimingPerformanceResourceTimingPerformanceScriptTimingPerformanceServerTimingPerformanceSoftNavigationTaskAttributionTimingVisibilityStateEntryWindow.performanceWorkerGlobalScope.performanceYour blueprint for a better internet.
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