The type of the error kind, constrained to Primitive (e.g., string, number, enum).
const err1 = new AnyError("Invalid input", "ValidationError");
const err2 = new AnyError("File not found", 404, new Error("ENOENT"));
expect(err1.message).toBe("[ValidationError] Invalid input.");
expect(err2.message).toBe("[404] File not found. Reason: ENOENT");
expect(err2.kind).toBe(404);
expect(err2.reason.message).toBe("ENOENT");
Constructs a new AnyError instance with a message, kind, and optional reason.
The error’s message is formatted as [kind] message or [kind] message. Reason: reason
if a reason is provided. The name is set to the constructor’s name,
and the reason is normalized to an Error instance.
The descriptive message for the error.
The category or type of the error, a primitive value.
Optionalreason: unknownAn optional underlying cause, which can be any value (converted to Error if not already).
OptionalcauseReadonlykindThe category or type of the error, represented as a primitive value.
This readonly property identifies the error’s kind, such as a string code or numeric status, and is set during construction.
ReadonlyreasonThe underlying cause of the error, represented as an Error instance.
This readonly property holds the reason provided during construction,
normalized to an Error object. If no reason is given, it defaults to
an error wrapping the kind.
OptionalstackStatic OptionalprepareOptional override for formatting stack traces
Staticstack
A generic error class extending
Errorwith a typedkindand optionalreason.This class provides a structured way to represent errors with a category (
kind) of a primitive type (e.g., string, number, enum) and an optional underlying cause (reason). The error message is automatically formatted to include both thekindandreason(if provided), making it suitable for categorized error handling in libraries or applications.