gateway-gamers.net/src/main.js

function loadHTML(file, elementId) {
  fetch(file)
    .then(r => r.text())
    .then(html => {
      document.getElementById(elementId).innerHTML = html;
      if (elementId === 'header') highlightActiveNav();
    })
    .catch(err => console.error('Error loading:', file, err));
}

function highlightActiveNav() {
  const current = location.pathname.split('/').pop() || 'index.html';
  document.querySelectorAll('#header a[href]').forEach(link => {
    if (link.getAttribute('href') === `/${current}`) {
      link.classList.add('active');
    }
  });
}

loadHTML('/header.html', 'header');
loadHTML('/footer.html', 'footer');