fault

Functional errors with formatted output.

Install

npm:

npm install fault

Use

var fault = require('fault')

throw fault('Hello %s!', 'Eric')

Yields:

Error: Hello Eric!
    at FormattedError (~/node_modules/fault/index.js:30:12)
    at Object.<anonymous> (~/example.js:3:7)
    …

Or, format a float in a type error:

var fault = require('fault')

throw fault.type('Who doesn’t like %f? \uD83C\uDF70', Math.PI)

Yields:

TypeError: Who doesn’t like 3.141593? 🍰
    at Function.FormattedError [as type] (~/node_modules/fault/index.js:30:12)
    at Object.<anonymous> (~/example.js:3:7)

API

fault(format?[, values...])

Create an error with a printf-like formatted message.

Parameters

• format (string, optional)
• values (*, optional)

Formatters

• %s — String
• %b — Binary
• %c — Character
• %d — Decimal
• %f — Floating point
• %o — Octal
• %x — Lowercase hexadecimal
• %X — Uppercase hexadecimal
• % followed by any other character, prints that character

See samsonjs/format for argument parsing.

Returns

An instance of Error.

Other errors

• fault.eval(format?[, values...]) — EvalError
• fault.range(format?[, values...]) — RangeError
• fault.reference(format?[, values...]) — ReferenceError
• fault.syntax(format?[, values...]) — SyntaxError
• fault.type(format?[, values...]) — TypeError
• fault.uri(format?[, values...]) — URIError

fault.create(Constructor)

Factory to create instances of ErrorConstructor with support for formatting. Used internally to wrap the global error constructors, exposed for custom errors. Returns a function just like fault.

License

MIT © Titus Wormer