1cead15b1e7bcfe2a606470b86e8c35719bda04bca23fa6876da182854c30706

Source Code:

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this._expandRectByRootMargin(t)},r.prototype._expandRectByRootMargin=function(t){var e=this._rootMarginValues.map(function(e,n){return"px"==e.unit?e.value:e.value*(n%2?t.width:t.height)/100}),n={top:t.top-e[0],right:t.right+e[1],bottom:t.bottom+e[2],left:t.left-e[3]};return n.width=n.right-n.left,n.height=n.bottom-n.top,n},r.prototype._hasCrossedThreshold=function(t,e){var n=t&&t.isIntersecting?t.intersectionRatio||0:-1,r=e.isIntersecting?e.intersectionRatio||0:-1;if(n!==r)for(var o=0;o<this.thresholds.length;o++){var i=this.thresholds[o];if(i==n||i==r||i<n!=i<r)return!0}},r.prototype._rootIsInDom=function(){return!this.root||f(e,this.root)},r.prototype._rootContainsTarget=function(t){return f(this.root||e,t)},r.prototype._registerInstance=function(){p.indexOf(this)<0&&p.push(this)},r.prototype._unregisterInstance=function(){var t=p.indexOf(this);-1!=t&&p.splice(t,1)},t.IntersectionObserver=r,t.IntersectionObserverEntry=n}(window,document)}]);
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