in src/modules/utils/button.js [24:36]
function bindClickToModeUpdate(attributeName, fn) {
var els = document.querySelectorAll('[data-' + attributeName + ']');
var bindClick = function(el) {
var mode = el.dataset.switchmode;
el.addEventListener('click', function() {
fn(mode);
});
};
for (var i = 0; i < els.length; ++i) {
bindClick(els[i]);
}
}