import { ComputedRef, Ref } from 'vue';
import { DeepPartial } from './utils';
export interface TrackedInstance<Data> {
    /** Reactive reference to the current (possibly modified) data. */
    data: Ref<Data>;
    /** True when at least one field differs from the value at the last loadData() call. */
    isDirty: ComputedRef<boolean>;
    /** Partial object containing only the fields that have changed since the last loadData(). */
    changedData: ComputedRef<DeepPartial<Data>>;
    /** Replaces the current data and clears the dirty state. The new value becomes the new baseline. */
    loadData: (newData: Data) => void;
    /** Reverts all changes, restoring data to the state at the last loadData() call. */
    reset: () => void;
}
export interface TrackedInstanceOptions {
    /**
     * Custom equality function for comparing primitive values.
     * When provided, replaces the default strict equality (===) check.
     * Called only for primitive leaf values (strings, numbers, booleans, null, undefined).
     *
     * @example treat null and empty string as equal
     * equals: (a, b) => (a ?? '') === (b ?? '')
     */
    equals?: (a: unknown, b: unknown) => boolean;
}
export declare function useTrackedInstance<Data = any>(value?: undefined, options?: TrackedInstanceOptions): TrackedInstance<Data | undefined>;
export declare function useTrackedInstance<Data>(value: Data, options?: TrackedInstanceOptions): TrackedInstance<Data>;