scroll,visible:Wt(this.$el),top:ui(this.placeholder)[0]}},write:function(t,e){var i=this,n=t.initTimestamp;void 0===n&&(n=0);var r=t.dir,o=t.lastDir,s=t.lastScroll,a=t.scroll,h=t.top,u=t.visible,c=performance.now();if(!((t.lastScroll=a)<0||a===s||!u||this.disabled||this.showOnUp&&"scroll"!==e||((300<c-n||r!==o)&&(t.initScroll=a,t.initTimestamp=c),t.lastDir=r,this.showOnUp&&Math.abs(t.initScroll-a)<=30&&Math.abs(s-a)<=10)))if(this.inactive||a<this.top||this.showOnUp&&(a<=this.top||"down"===r||"up...