Autocomplete

index.html

<input id="autocomplete">

main.js

const autocomplete = document.querySelector('#autocomplete')

function debounce(callback, delay) {
  let timer
  return (...args) => {
    clearTimeout(timer)
    timer = setTimeout(function() {
      callback(...args)
    }, delay)
  }
}

const __e = debounce(function(text) {
  console.log(text)
}, 2000)

autocomplete.addEventListener('input', function(event) {
  __e(event.target.value)
})