Single event to track clicks on all elements within the page. Simply add the data-tracking-label attribute to any elements that should be tracked. If an element is clicked that does not have this attribute we walk up the DOM till we find one that does. Be sure to add a data-tracking-label on your outermost div or body.

ga-click-tracking.js

/**
 * Recursively an ancestor element with a matching attribute.
 **/
const findAncestor = (el, label) => {
   while ((el = el.parentElement) && !el.getAttribute(label));
   return el.getAttribute(label);
}

/**
 * Retrieve the attribute or its ancestor attribute.
 **/
getlabel = el => {
    const label = 'data-tracking-label'
    return el.getAttribute(label) || findAncestor(el, label);
}

/**
 * Add a click listener that watches all elements on the page.
 **/
document.addEventListener('click', event => {
    const label = getlabel(event.target);
    // do your thing with the label
    ga('send', 'event', 'page', 'click', label);
}, false);