grafana/k6 · error

getProperties: %w

Error message

getProperties: %w

What it means

Once selectOption succeeds, k6 calls Runtime.getProperties on the returned array handle to enumerate the chosen <option> elements. If that CDP call fails (session closed, context destroyed, protocol error), you get 'getProperties: <cause>'. The selection itself worked; only reading back the result failed.

Source

Thrown at internal/js/modules/k6/browser/common/frame.go:1734

		return handle.selectOption(apiCtx, values)
	}
	act := f.newAction(
		selector, DOMElementStateAttached, opts.Strict, selectOption,
		[]string{}, opts.Force, withRetry, opts.NoWaitAfter, opts.Timeout,
	)
	v, err := call(f.ctx, act, opts.Timeout)
	if err != nil {
		return nil, errorFromDOMError(err)
	}
	selectHandle, ok := v.(jsHandle)
	if !ok {
		return nil, fmt.Errorf("unexpected select element type %T", v)
	}

	// pack the selected <option> values inside <select> into a slice
	optHandles, err := selectHandle.getProperties()
	if err != nil {
		return nil, fmt.Errorf("getProperties: %w", err)
	}
	vals := make([]string, 0, len(optHandles))
	for _, oh := range optHandles {
		val, err := oh.JSONValue()
		if err != nil {
			return nil, fmt.Errorf("reading value: %w", err)
		}
		vals = append(vals, val)
		if err := oh.dispose(); err != nil {
			return nil, fmt.Errorf("optionHandle.dispose: %w", err)
		}
	}
	if err := selectHandle.dispose(); err != nil {
		return nil, fmt.Errorf("selectHandle.dispose: %w", err)
	}

	return vals, nil
}

View on GitHub (pinned to 93accf6570)

Solutions

1. Prevent the submit/reload during selection (e.g. event.preventDefault in an addInitScript, or select a value that does not trigger navigation) if you only need the return value.
2. Delay page.close() until after selectOption returns.
3. If you do not need the selected values, ignore the error path by wrapping the call and treating this specific failure as success-after-verify (re-read values with evaluate later).

Example fix

// before
await page.selectOption('#country', 'JP'); // onchange submits form -> readback races

// after
await page.evaluate(() => {
  document.querySelector('#country').addEventListener('change', e => e.preventDefault());
});
await page.selectOption('#country', 'JP');

await frame.evaluate(() => {
  document.querySelector('#sel')?.addEventListener('change', e => e.preventDefault());
});

try { return await page.selectOption(sel, v); }
catch (e) {
  if (/getProperties/.test(e.message)) {
    return page.evaluate(() => [...document.querySelector(sel).selectedOptions].map(o => o.value));
  }
  throw e;
}

When it happens

Trigger: Navigation or frame detach between the selectOption click completing and the getProperties readback; CDP session dropped (browser crash, page closed by the site); debugger attached interfering with the protocol.

Common situations: onchange handlers that submit the form / reload the page immediately after selection — the readback races the navigation; tests that close the page in a helper right after selecting.

Related errors

• getting node in frame: %w
• resolving DOM node: %w
• the page may have navigated away or the element is now mi
• describing DOM node: %w
• optionHandle.dispose: %w

AI-assisted analysis of grafana/k6@93accf6570 (2026-08-15). Data as JSON: /api/errors/142fb9bc956d3030. Report an issue: GitHub.