NativeScript/apps/app/ui-tests-app/list-view/dynamic-templates.ts

import { Page } from "tns-core-modules/ui/page";
import { ViewModel } from "./main-view-model";

export function pageLoaded(args) {
    let page = <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);
}