demo · v138

Crash report context: isTopLevel & visibilityState

A live ReportingObserver wired up to "crash". Toggle visibility, embed this page in itself, click "simulate" to see the shape of the report — including the new isTopLevel flag (top-level frame vs iframe) and visibilityState at the moment of the crash.

checking support…

Current top frame

document.visibilityState— isTopLevel (would-be)— document.hasFocus()— URL—

Embedded iframe (will report as not top-level)

simulated crash reports captured

No reports yet. Click "Simulate" above.

the code

const observer = new ReportingObserver((reports) => {
  for (const r of reports) {
    if (r.type !== "crash") continue;
    console.log({
      reason: r.body.reason,
      isTopLevel: r.body.isTopLevel,           // NEW in 138
      visibilityState: r.body.visibilityState, // NEW in 138
    });
  }
});
observer.observe();

see also