Interface UndoMiddlewareOptions<S>

Undo middleware options.

interface UndoMiddlewareOptions<S> {
    attachedState?: {
        restore(s): void;
        save(): S;
    };
    maxRedoLevels?: number;
    maxUndoLevels?: number;
}

Type Parameters

  • S

Properties

attachedState? maxRedoLevels? maxUndoLevels?

Properties

Optional attachedState

attachedState?: {
    restore(s): void;
    save(): S;
}

Attached states are states that are saved/restored when undoing/redoing. Usually used to restore state that is not part of the document model such as focus, selection, scroll position, etc.

Type declaration

  • restore:function
    • restore(s): void

    • Restores a certain state previously saved.

      Parameters

      • s: S

        State to restore.

      Returns void

  • save:function
    • save(): S

    • Saves a certain state and associates it with the undo step. This state can be restored when undoing/redoing.

      Returns S

Optional maxRedoLevels

maxRedoLevels?: number

Max number of redo levels to keep, or undefined for infinite.

Optional maxUndoLevels

maxUndoLevels?: number

Max number of undo levels to keep, or undefined for infinite.

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