Дмитрий Марков

await new Promise(resolve => {
  anime({
    complete: () => { resolve() }
  })
})

var data = [{pageID: "190", amount: "1"}, {pageID: "190", amount: "2"}];

function combineObjects(data) {
	let arr = [];
	data.forEach(obj=>{
		let pageID = obj.pageID;
		arr[pageID] = arr[pageID] || {pageID: pageID, amount: 0};
		arr[pageID].amount = +arr[pageID].amount+ +obj.amount+'';
	});
	return arr.filter(e=>e);
}

console.log(sumObjects(data)); // [{pageID: "190", amount: "3"}]