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readme.md

fault

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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.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