API reference / @backpack/error-handling / promises / onFailureIfInstanceOf
Function: onFailureIfInstanceOf()
ts
function onFailureIfInstanceOf<TError>(errorClass, errorConsumer): (error) => never;Executes the given callback if failed, if the error is an instance of the class provided, letting the original error pass through.
Can be applied on .catch() method of a Promise to introduce a side effect, such as logging.
Type Parameters
| Type Parameter |
|---|
TError |
Parameters
| Parameter | Type |
|---|---|
errorClass | Class<TError> |
errorConsumer | (error) => void |
Returns
ts
(error): never;Parameters
| Parameter | Type |
|---|---|
error | unknown |
Returns
never