Framework
WatcherCallback()<V>
Type Alias: WatcherCallback()<V>
type WatcherCallback<V> = (oldValue, newValue) => void | Promise<void>;Watcher callback signature. Receives (oldValue, newValue) for compatibility with existing code.
Type Parameters
| Type Parameter | Default type |
|---|---|
V | unknown |
Parameters
| Parameter | Type |
|---|---|
oldValue | V | undefined |
newValue | V | undefined |
Returns
void | Promise<void>