PerformanceMark: detail property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2015.

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Note: This feature is available in Web Workers.

The read-only detail property returns arbitrary metadata that was included in the mark upon construction (either when using performance.mark() or the PerformanceMark() constructor).

Value

Returns the value it is set to (from markOptions of performance.mark() or the PerformanceMark() constructor).

Examples

The following example demonstrates the detail property.

performance.mark("dog", { detail: "labrador" });

const dogEntries = performance.getEntriesByName("dog");

dogEntries[0].detail; // labrador

Specifications

Specification
User Timing # dom-performancemark-detail

Browser compatibility

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