@jiaozhiye/qm-design-vue
Version:
A Component Library for Vue3.0
17 lines (16 loc) • 971 B
TypeScript
export type ObserverInstanceCallback = (inView: boolean, entry: IntersectionObserverEntry) => void;
/**
* What should be the default behavior if the IntersectionObserver is unsupported?
* Ideally the polyfill has been loaded, you can have the following happen:
* - `undefined`: Throw an error
* - `true` or `false`: Set the `inView` value to this regardless of intersection state
* **/
export declare function defaultFallbackInView(inView: boolean | undefined): void;
/**
* @param element - DOM Element to observe
* @param callback - Callback function to trigger when intersection status changes
* @param options - Intersection Observer options
* @param fallbackInView - Fallback inView value.
* @return Function - Cleanup function that should be triggered to unregister the observer
*/
export declare function observe(element: Element, callback: ObserverInstanceCallback, options?: IntersectionObserverInit, fallbackInView?: boolean | undefined): () => void;