grafana/k6 · error

parsing waitForFunction options: %w

Error message

parsing waitForFunction options: %w

What it means

Error "parsing waitForFunction options: %w" thrown in grafana/k6.

Source

Thrown at internal/js/modules/k6/browser/browser/page_mapping.go:822

				return nil, nil
			})
			if pageEvent.wait {
				if _, err := wait(); errors.Is(err, context.Canceled) {
					return errors.New("iteration ended before page.on handler completed executing")
				}
			}
			return nil
		})
	}
}

func parseWaitForFunctionArgs(
	ctx context.Context, timeout time.Duration, pageFunc, opts sobek.Value, gargs ...sobek.Value,
) (string, *common.FrameWaitForFunctionOptions, []any, error) {
	popts := common.NewFrameWaitForFunctionOptions(timeout)
	err := popts.Parse(ctx, opts)
	if err != nil {
		return "", nil, nil, fmt.Errorf("parsing waitForFunction options: %w", err)
	}

	js := pageFunc.ToString().String()
	_, isCallable := sobek.AssertFunction(pageFunc)
	if !isCallable {
		js = fmt.Sprintf("() => (%s)", js)
	}

	return js, popts, exportArgs(gargs), nil
}

// parseStringOrRegex parses a sobek.Value to return either a quoted string if it was a string,
// or a raw string if it was a JS RegExp object or another type.
//
// Some getBy* APIs work with single quotes and some work with double quotes.
// This inconsistency seems to stem from the injected code copied from
// Playwright itself.
//

View on GitHub (pinned to 93accf6570)

When it happens

Trigger: Thrown at internal/js/modules/k6/browser/browser/page_mapping.go:822 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of grafana/k6@93accf6570 (2026-08-15). Data as JSON: /api/errors/0ac5f2ff3984fdbf. Report an issue: GitHub.