How to set map scale automatically?

Question

Yandex maps

It is necessary that the zoom of the map be set as close as possible based on the marks, so that they all fit on the map and are visible.
I do it like this:

var barMap = new ymaps.Map('y-map', {
    center: [55.72504493, 37.64696100],
    zoom: 10,
    behaviors: ['default', 'scrollZoom']
}), coords = [], barList = [someJsonData];
var collection = new ymaps.GeoObjectCollection();
 
for (var i in barList) {
    coords = barList[i].coords.split(',');
    collection.add(new ymaps.Placemark([coords[0], coords[1]], {
        balloonContentHeader: '<a href="/bars/' + barList[i].link + '" target="_blank" title="Откроется в новом окне">' + barList[i].name + '</a>',
        balloonContent: barList[i].address
    }));
}
 
barMap.geoObjects.add(collection);
barMap.setBounds(collection.getBounds());

As a result, I see this: joxi.ru/L21jx64TVOKYAX

Answer 1

Understood what the problem is.
Initially, the map is in a hidden div.

Answer 2

Judging by the code, your coordinates are given by strings, not numbers.