TimelineEvent Properties | 
The TimelineEvent type exposes the following members.
| Name | Description | |
|---|---|---|
| Duration | 
            Event duration, if applicable.
              | |
| FrameId | 
            Identifies the frame that this event is related to. Empty for non-frame targets.
              | |
| LayoutShiftDetails | 
            LayoutShiftDetails
              | |
| LcpDetails | 
            LcpDetails
              | |
| Name | 
            Name may be empty depending on the type.
              | |
| Time | 
            Time in seconds since Epoch, monotonically increasing within document lifetime.
              | |
| Type | 
            The event type, as specified in https://w3c.github.io/performance-timeline/#dom-performanceentry-entrytype
            This determines which of the optional "details" fiedls is present.
              |