const input = // ...
input.addEventListener('input', event => {
const value = event.target.value.trim().toLowerCase();
event.target.closest('.search').querySelectorAll('li').forEach(node => {
node.classList.toggle('hide', value !== '' && !node.textContent.toLowerCase().includes(value));
});
});
const input = document.querySelector('.input-group input');
input.addEventListener('input', event => {
event.target.closest('.input-group').querySelectorAll('li').forEach(node => {
node.classList.toggle('hidden', node.textContent.includes(input));
});
});