Debounce for API calls based on key up.

debounce.md

function debounce(callback, wait) {
  let timeout;
  return (...args) => {
      const context = this;
      clearTimeout(timeout);
      timeout = setTimeout(() => callback.apply(context, args), wait);
  };
}

window.addEventListener('keyup', debounce( () => {
    // code you would like to run 1000ms after the keyup event has stopped firing
    // further keyup events reset the timer, as expected
}, 1000))