[Nexus]

var container = document.querySelector('block-selector');
if (!container) {
    return;
}

container.querySelectorAll('a[href]').forEach(function (node) {
    var href = node.getAttribute('href');

    node.addEventListener('click', function (e) {
        e.preventDefault();

        onClick(href);// onClick - you function name
    });

    node.href = '#';
});