snippet.js

// this click listener has to be added simply to a click event on an a-entity element
const clickListener = function (ev) {
    ev.stopPropagation();
    ev.preventDefault();

    const name = ev.target.getAttribute('name');
    const el = ev.detail.intersection && ev.detail.intersection.object.el;

    if (el && el === ev.target) {
        // after click, we are adding a label with the name of the place
        const label = document.createElement('span');
        const container = document.createElement('div');
        container.setAttribute('id', 'place-label');
        label.innerText = name;
        container.appendChild(label);
        document.body.appendChild(container);

        setTimeout(() => {
            // that will disappear after less than 2 seconds
            container.parentElement.removeChild(container);
        }, 1500);
     }
 };