error3/examples/fs-errors.js

Error3 is proper JS error implementation. It supports error codes, message formatting (e.g. i18n) and nested errors.

import Error3 from 'error3'

export class FsError extends Error3 {}

export class FileNotFound extends FsError {
  code = 'fs_not_found'

  format({filepath}) {
    return `File or directory "${filepath}" not found`
  }
}

export class FileTooLarge extends FsError {
  code = 'fs_too_large'

  format({filepath, size}) {
    return `File "${filepath}" too large (${size})`
  }
}

export class Unknown extends FsError {
  code = 'fs_unknown'

  format({filepath}) {
    return `Unknown error rised "${filepath}"`
  }
}