Module 313271

function(e,t,n){"use strict";n.d(t,{j:()=>s});var r=n(621466);let i={root:null,rootMargin:"0px",threshold:.5};class s{_observer;_options;_nodes=new WeakMap;_components=new WeakMap;_visibleComponents=new WeakSet;constructor(e=i){this._options=e,null!=window.IntersectionObserver&&(this._observer=new window.IntersectionObserver(this._handleEntries,e))}_handleEntries=e=>{e.forEach(e=>{let t;if(null!=e.isIntersecting)t=e.isIntersecting;else{let{threshold:n}=this._options;t=null==n?e.intersectionRatio>0:Array.isArray(n)?n.some(t=>e.intersectionRatio>t):e.intersectionRatio>n}let n=this._nodes.get(e.target);if(null!=n){let e=!1;t?this._visibleComponents.has(n)||(this._visibleComponents.add(n),e=!0):this._visibleComponents.has(n)&&(this._visibleComponents.delete(n),e=!0),e&&n.forceUpdate()}})};isVisible(e){return null==this._observer||this._visibleComponents.has(e)}observe(e,t){let n=this._observer;if(null==n)return;this.unobserve(e);let i=t.current;(0,r.vq)(i,HTMLElement)&&(this._nodes.set(i,e),this._components.set(e,i),n.observe(i))}unobserve(e){let t=this._observer;if(null==t)return;let n=this._components.get(e);null!=n&&(this._nodes.delete(n),this._components.delete(e),this._visibleComponents.delete(e),t.unobserve(n))}}}