export interface RenderStrategy {
    type: 'default' | 'viewport' | 'throttle' | 'debounce';
}
/**
 * @publicApi
 *
 * @description
 * Default render strategy
 */
export interface DefaultRenderStategy extends RenderStrategy {
    type: 'default';
}
/**
 * @publicApi
 *
 * @description
 * Viewport render strategy which configures to trigger change detection
 * only when the element is in the viewport.
 */
export interface ViewportRenderStrategy extends RenderStrategy {
    type: 'viewport';
    root?: HTMLElement;
    rootMargin?: string;
    threshold?: number | number[];
}
/**
 * @publicApi
 *
 * @description
 * Throttle render strategy which will throttle down trigger change detection.
 *
 */
export interface ThrottleRenderStrategy extends RenderStrategy {
    type: 'throttle';
    throttleInMs: number;
}
/**
 * @publicApi
 *
 * @description
 * Debounce render strategy which will debounce to trigger change detection.
 */
export interface DebounceRenderStrategy extends RenderStrategy {
    type: 'debounce';
    debounceInMs: number;
}
export declare type RenderStrategies = DefaultRenderStategy | ViewportRenderStrategy | ThrottleRenderStrategy | DebounceRenderStrategy;
/**
 * @description
 * Checks if the strategy is a {@link DefaultRenderStategy}.
 * @param strategy
 */
export declare function isDefaultRenderStrategy(strategy: RenderStrategy): strategy is DefaultRenderStategy;
/**
 * @description
 * Checks if the strategy is a {@link ViewportRenderStrategy}.
 * @param strategy
 */
export declare function isViewportRenderStrategy(strategy: RenderStrategy): strategy is ViewportRenderStrategy;
/**
 * @description
 * Checks if the strategy is a {@link ThrottleRenderStrategy}.
 * @param strategy
 */
export declare function isThrottleRenderStrategy(strategy: RenderStrategy): strategy is ThrottleRenderStrategy;
/**
 * @description
 * Checks if the strategy is a {@link DebounceRenderStrategy}.
 * @param strategy
 */
export declare function isDebounceRenderStrategy(strategy: RenderStrategy): strategy is DebounceRenderStrategy;