grafana/k6 · error

invalid argument, cannot use a '%T' as a selector

Error message

invalid argument, cannot use a '%T' as a selector

What it means

Error "invalid argument, cannot use a '%T' as a selector" thrown in grafana/k6.

Source

Thrown at js/modules/k6/html/html.go:113

	selFilter func(*goquery.Selection) *goquery.Selection,
	nodeFilter func(...*gohtml.Node) *goquery.Selection,
) Selection {
	switch v := arg.(type) {
	case Selection:
		return Selection{s.rt, selFilter(v.sel), s.URL}

	case string:
		return Selection{s.rt, strFilter(v), s.URL}

	case Element:
		return Selection{s.rt, nodeFilter(v.node), s.URL}

	case sobek.Value:
		return s.varargFnCall(v.Export(), strFilter, selFilter, nodeFilter)

	default:
		err := fmt.Errorf("invalid argument, cannot use a '%T' as a selector", arg)
		panic(s.rt.NewGoError(err))
	}
}

func (s Selection) adjacent(unfiltered func() *goquery.Selection,
	filtered func(string) *goquery.Selection,
	def ...string,
) Selection {
	if len(def) > 0 {
		return Selection{s.rt, filtered(def[0]), s.URL}
	}

	return Selection{s.rt, unfiltered(), s.URL}
}

func (s Selection) adjacentUntil(until func(string) *goquery.Selection,
	untilSelection func(*goquery.Selection) *goquery.Selection,
	filteredUntil func(string, string) *goquery.Selection,
	filteredUntilSelection func(string, *goquery.Selection) *goquery.Selection,

View on GitHub (pinned to 93accf6570)

When it happens

Trigger: Thrown at js/modules/k6/html/html.go:113 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/6e160dd4166fbd00. Report an issue: GitHub.