document.querySelectorAll('.tabs-toggle').forEach(function (button) { button.addEventListener('click', function (e) { // set parent tabs to unselected const tabs = Array.from(e.target.parentElement.querySelectorAll('.tabs-toggle')); tabs.map(tab => tab.dataset.state = ''); // set current tab to selected e.target.dataset.state = 'selected'; // set all panels to unselected const panelsContainer = e.target.parentElement.nextElementSibling; Array.from(panelsContainer.children).forEach(function (panel) { panel.dataset.state = ''; }); const panelId = e.target.getAttribute('aria-controls'); const panel = panelsContainer.querySelector(`#${panelId}`); panel.dataset.state = 'selected'; }); });