PerformanceSoftNavigation: navigationId property

The navigationId read-only property of the PerformanceSoftNavigation interface returns an increasing integer id unique to this page load.

Value

An integer unique to this page load.

Examples

Logging the navigationId of the soft navigation

This example uses a PerformanceObserver to log new soft-navigation performance entries as they are recorded in the browser's performance timeline. The buffered option is used to access entries from before the observer creation.

const observer = new PerformanceObserver((list) => {
  for (const entry of list.getEntries()) {
    console.log("Soft Nav:", entry.startTime, entry.navigationId);
  }
});
observer.observe({ type: "soft-navigation", buffered: true });

Specifications