Callback()<T>

Callback<T>: (error?: Error | null, result?: T | null) => void

A callback definition.

Example

asyncFunction((error, result) => {
     if (error) {
         // handle error
     } else if (result) {
         // handle success
     }
});

Type Parameter
`T`

Parameter	Type
`error`?	`Error` \| `null`
`result`?	`T` \| `null`

void