Class Err<E, S>

result

• result(): ResultErr<E, S>

  Returns a ResultErr containing this error and null.

  Returns ResultErr<E, S>

  A ResultErr.

  Example

  const [error, value] = new Err("my_error").result();
  // error is { label: "my_error", source: Error("my_error") }
  // value is null
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tap

• tap(fn: (error: this) => void): this

  Performs a side effect with the error, then returns the error instance for chaining.

  Parameters

  • fn: (error: this) => void

    The function to execute for the side effect.

  Returns this

  The Err instance.

  Example

  const [error, value] = new Err("my_error").tap(e => console.error(e.source)).result();
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constructor

• new Err<E extends string = string, S = unknown>(label: E, source?: S): Err<E, S>

  Type Parameters

  • E extends string = string
  • S = unknown

  Parameters

  • label: E
  • Optionalsource: S

  Returns Err<E, S>

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