Creates a new HttpError.
Prefer the factory functions in exceptions.ts over calling this
constructor directly — they guarantee a correct status code.
HTTP status code (e.g. 404)
Human-readable error message
Optionaldetails: Readonly<Record<string, unknown>>
Optional structured details; omitted when absent
Optionalcause: Error
Optional underlying error; forwarded to the ES2022 cause chain
OptionalcauseOptional ReadonlydetailsStructured details appended to the error body. Omitted entirely when not
supplied (never undefined) so serialization stays clean.
declare suppresses the ES2022 class-field initialization that would
otherwise set this to undefined on every instance — it only exists on
the object when actually assigned by the constructor.
OptionalstackReadonlystatusThe HTTP status code this error maps to.
StaticstackThe Error.stackTraceLimit property specifies the number of stack frames
collected by a stack trace (whether generated by new Error().stack or
Error.captureStackTrace(obj)).
The default value is 10 but may be set to any valid JavaScript number. Changes
will affect any stack trace captured after the value has been changed.
If set to a non-number value, or set to a negative number, stack traces will not capture any frames.
StaticcaptureCreates a .stack property on targetObject, which when accessed returns
a string representing the location in the code at which
Error.captureStackTrace() was called.
const myObject = {};
Error.captureStackTrace(myObject);
myObject.stack; // Similar to `new Error().stack`
The first line of the trace will be prefixed with
${myObject.name}: ${myObject.message}.
The optional constructorOpt argument accepts a function. If given, all frames
above constructorOpt, including constructorOpt, will be omitted from the
generated stack trace.
The constructorOpt argument is useful for hiding implementation
details of error generation from the user. For instance:
function a() {
b();
}
function b() {
c();
}
function c() {
// Create an error without stack trace to avoid calculating the stack trace twice.
const { stackTraceLimit } = Error;
Error.stackTraceLimit = 0;
const error = new Error();
Error.stackTraceLimit = stackTraceLimit;
// Capture the stack trace above function b
Error.captureStackTrace(error, b); // Neither function c, nor b is included in the stack trace
throw error;
}
a();
OptionalconstructorOpt: FunctionStaticfromCreates an HttpError from an HttpErrorInit object.
Convenience overload used by factory functions so they can branch on
optional details/cause once.
The error options
A new HttpError
Staticprepare
The framework's HTTP error type.
Throw an instance directly, or — preferably — construct one via a factory function from ./exceptions.ts so the status code is correct by construction:
Example
The error handler middleware inspects the
statusCodeto set the response status, and serializesmessageanddetailsinto the error body.Since
0.1.0