import { Page } from "tns-core-modules/ui/page"; import { ViewModel } from "./main-view-model"; export function pageLoaded(args) { let page = args.object; const viewModel = new ViewModel(); page.bindingContext = { "items": viewModel.items }; } exports.onItemTap = function (args) { const list = args.object; let index = args.index; let listArray = list.page.bindingContext["items"]; let currentItem = listArray.getItem(index); currentItem.age = currentItem.age + 1; listArray.setItem(index, currentItem); };