Function ono

src/singleton.ts:22–43

* Creates a new error with the specified message, properties, and/or inner error. * If an inner error is provided, then the new error will match its type, if possible.

(...args: unknown[])

 * If an inner error is provided, then the new error will match its type, if possible.
 */
function ono<E extends ErrorLike, P extends object>(...args: unknown[]) {
  let originalError = args[0] as ErrorLike | undefined;

  // Is the first argument an Error-like object?
  if (typeof originalError === "object" && typeof originalError.name === "string") {

    // Try to find an Ono singleton method that matches this error type
    for (let typedOno of Object.values(onoMap)) {
      if (typeof typedOno === "function" && typedOno.name === "ono") {
        let species = typedOno[Symbol.species];

        if (species && species !== Error && (originalError instanceof species || originalError.name === species.name)) {
          // Create an error of the same type
          return typedOno.apply(undefined, args);
        }
      }
    }
  }

  // By default, create a base Error object
  return ono.error.apply(undefined, args);
}