element-height-observer/dist/index.d.ts

Allows you to add an efficient height listener to any dom element and execute a callback when its height changes

export interface IHeightObserverOptions {
    direction?: 'both' | 'horizontal' | 'vertical';
}
export declare function registerHeightObserver(element: HTMLElement, options: IHeightObserverOptions | (() => void), callback?: () => void): void;
export declare function unregisterHeightObserver(element: HTMLElement): void;