// Created on savesnippets.com · https://savesnippets.com/Kzur5C7GmBSiNO
function debounce(fn, wait = 300) {
  let timer;
  return function (...args) {
    clearTimeout(timer);
    timer = setTimeout(() => fn.apply(this, args), wait);
  };
}

// Usage
const onSearch = debounce((e) => {
  console.log('Searching:', e.target.value);
}, 400);

document.querySelector('#search').addEventListener('input', onSearch);