Function onSelect

buttons.js:31–42

(event)

                var clickedElement = elements[i];

                var onSelect = function (event) {
                    event.preventDefault();

                    if (activeElement !== clickedElement) {
                        activeElement = clickedElement;

                        changeCallback(index);

                        refresh();
                    }

                };

                elements[i].addEventListener('click', onSelect);
                elements[i].addEventListener('touchstart', onSelect);