Home > @thi.ng/atom > History > (constructor)
Constructs a new instance of the History class
Signature:
constructor(state: IAtom<T>, maxLen?: number, changed?: Predicate2<T>);| Parameter | Type | Description |
|---|---|---|
| state | IAtom<T> |
parent state |
| maxLen | number |
max size of undo stack |
| changed | Predicate2<T> |
predicate to determine changed values (default !equiv(a,b)) |