grafana/k6 · error

matching url with regex: %w

Error message

matching url with regex: %w

What it means

Error "matching url with regex: %w" thrown in grafana/k6.

Source

Thrown at internal/js/modules/k6/browser/browser/metric_event_mapping.go:19

package browser

import (
	"fmt"

	"go.k6.io/k6/v2/internal/js/modules/k6/browser/common"
)

// mapMetricEvent to the JS module.
func mapMetricEvent(vu moduleVU, event common.PageEvent) mapping {
	rt := vu.Runtime()
	em := event.Metric

	return mapping{
		"tag": func(urls common.TagMatches) error {
			callback := func(pattern, url string) (bool, error) {
				matched, err := rt.RunString(pattern + `.test('` + url + `')`)
				if err != nil {
					return false, fmt.Errorf("matching url with regex: %w", err)
				}
				return matched.ToBoolean(), nil
			}

			return em.Tag(callback, urls) //nolint:wrapcheck
		},
	}
}

View on GitHub (pinned to 93accf6570)

When it happens

Trigger: Thrown at internal/js/modules/k6/browser/browser/metric_event_mapping.go:19 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/43c5977e2b8462c6. Report an issue: GitHub.