mylloon.fr/static/js/mail_obfuscation.js

window.addEventListener("load", () => {
  Array.from(document.getElementsByClassName("at")).forEach((elem) => {
    const span = elem.parentElement;

    // Replace (at) by @
    elem.outerHTML = "@";

    // Remove useless span
    const a = span.parentElement;

    // Correct text
    const data = span.getAttribute("data");
    a.innerHTML = data.length > 0 ? data : span.textContent;

    // Change link
    a.setAttribute("href", a.getAttribute("href").replace(" at ", "@"));
  });
});