Add allowErrorTypes()

src/error/types.js

@@ -0,0 +1,11 @@
+import { normalizeError } from './utils.js'
+import { wrapError } from './wrap.js'
+
+// Ensure an error is among a specific set of error types.
+// Otherwise, assign a default error type (`errorTypes[0]`).
+export const allowErrorTypes = function (error, errorTypes) {
+  const errorA = normalizeError(error)
+  return errorTypes.some((errorType) => errorA instanceof errorType)
+    ? errorA
+    : wrapError(errorA, '', errorTypes[0])
+}