data must be an ArrayBuffer, TypedArray, or DataView

Error message

data must be an ArrayBuffer, TypedArray, or DataView

What it means

Error "data must be an ArrayBuffer, TypedArray, or DataView" thrown in grafana/k6.

Source

Thrown at internal/js/modules/k6/webcrypto/subtle_crypto.go:423

//   - SHA-512
//
// The `data` parameter should contain the data to be digested.
func (sc *SubtleCrypto) Digest(algorithm sobek.Value, data sobek.Value) (*sobek.Promise, error) {
	rt := sc.vu.Runtime()

	var (
		hashFn func() hash.Hash
		bytes  []byte
	)

	err := func() error {
		var err error

		// Validate that the value we received is either an ArrayBuffer, TypedArray, or DataView
		// This uses the technique described in https://github.com/dop251/goja/issues/379#issuecomment-1164441879
		if !IsInstanceOf(sc.vu.Runtime(), data, ArrayBufferConstructor, DataViewConstructor) &&
			!IsTypedArray(sc.vu.Runtime(), data) {
			return errors.New("data must be an ArrayBuffer, TypedArray, or DataView")
		}

		bytes, err = exportArrayBuffer(rt, data)
		if err != nil {
			return err
		}

		normalized, err := normalizeAlgorithm(rt, algorithm, OperationIdentifierDigest)
		if err != nil {
			return err
		}

		var ok bool
		hashFn, ok = getHashFn(normalized.Name)
		if !ok {
			return NewError(
				NotSupportedError,
				"unsupported digest algorithm '"+normalized.Name+"', "+

View on GitHub (pinned to 93accf6570)

When it happens

Trigger: Thrown at internal/js/modules/k6/webcrypto/subtle_crypto.go:423 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/72d1ab13d4a773b5. Report an issue: GitHub.