How on the Yandex map, when you click on the button, open the balloon at the point?

Question

JavaScript

How on the Yandex map, when you click on the button, open the balloon at the point?

obj.balloon.open() // Правильно?

myMap.setCenter(schools[glCity].filials[glFilial].coord, 16).balloon.open();

The first part of setCenter works, but the balloon does not open, how to open it correctly?

Answer 1

<button id="show">Показать на карте</button>
<div id="map" style="width: 300px; height: 300px"></div>

ymaps.ready(init);
    var myMap;
    function init(){     
        myMap = new ymaps.Map ("map", {
            center: [55.76, 37.64],
            zoom: 7            
        })}
var el = document.getElementById("show");
el.addEventListener("click", showBal, false);
function showBal(){
myMap.balloon.open(myMap.getCenter(), { content: 'Hello Yandex!' }, { closeButton: true });
}

https://jsfiddle.net/Fullzero5/sejfkLf1/

Answer 2

map.setCenter returns a Promise, not a map.
https://tech.yandex.ru/maps/doc/jsapi/2.1/ref/ref...