eror

Error utilities which provide error classes for HTTP response (4xx, 5xx) and more.

Installation

$ npm install eror

Example

// Formatted message
new eror.InvalidTypeError('"%s" must be a string!', 'name');

// Custom status code
new eror.MissingValueError(400, '"%s" is required!', 'age');

// Pre-defined HTTP errors
new eror.NotFoundError('User "%s" not found!', 'paul');

// Custom errors
eror(503, 'The Earth is %s!', 'exploding');

API reference

eror([statusCode], [message || format], [...values])

Create a custom error.

eror(401, 'You are not logged in!');
eror('Welcome, %s %s.', 'John', 'Lennon');

• statusCode: Status code as a number, defaults to 500.
• message: Error message.
• format: Placeholder string, please refer to util.format for more details.
• ...values: Values to be placed in placeholder string.

new eror[name]([statusCode], [message || format], [...values])

Instantiate a new common error.

new eror.MissingValueError(400, '"%s" field is required!', 'name');

• name: Class name of the error, as specified in common error list.
• statusCode: Status code, if is not specified, default status code, 500, will be used.
• message, format and ...values: as in eror().

new eror[name || statusCode]([message || format], [...values])

Instantiate a new HTTP error.

new eror.NotFoundError('Requested resource not found!');
new eror[500]('Server exploded at %s!', new Date());

• name: Class name of the error, as specified in HTTP error list.
• statusCode: Status code of HTTP error.
• message, format and ...values: as in eror().

HTTP error's status code cannot be overridden.

Error properties

var err = eror(404, 'Nothing!');

err.message; // Nothing!
err.statusCode; // 404
err.status; // also 404

• message
• statusCode and status: Status code of the error.

Error class properties

eror.InternalServerError.MESSAGE; // Internal Server Error
eror.InternalServerError.STATUS_CODE; // 500
eror.InternalServerError.STATUS; // also 500

• MESSAGE: Default error message of errors which are instantiate from this class.
• STATUS_CODE and STATUS: Default status code.

Error list

Common errors

HTTP errors

Contributing

• Submit new issue if there is any common error, which is useful for you or others, unavailable.

• In lieu of a formal styleguide, take care to maintain the existing coding style. .editorconfig and .jshintrc files can give you more details.

• Add tests for any new or changed functionality/element.

• Lint and test your code using npm test.

Author

• Website: http://meo.guru
• Twitter: @meoguru

License

Released under MIT license.