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                <h3>Búsqueda en listas desplegables mediante Datalist</h3>
<h4>Introduce tu editor de texto favorito</h4>
<input list=text_editors>
<datalist id="text_editors">
    <select multiple size=8>
      <option value="Atom">Atom
      <option value="Brackets">Brackets		
      <option value="Notepad ++">Notepad ++
      <option value="Notepad">Notepad
      <option value="Sublime Text">Sublime Text
      <option value="TextEdit">TextEdit
      <option value="TextMate">TextMate
      <option value="Wordpad">Wordpad


                body {
  text-align: center;

button {
  font-family: palatino;
  font-size: 12pt;

input {
  width: 250px;
  height: 30px;
  padding: 3px;
  border: 1px solid #DDE1E4;

select {
  width: 258px;
  position: relative;
  left: -17px;
  margin: 0;
  border: 1px solid #DDE1E4;
  border-top: none;

datalist {
  display: none;

option {
  padding: 3px;

option:hover {
  background-color: #FFD012;

button {
  width: 30px;
  height: 38px;
  position: relative;
  left: -5px;
  border: 1px solid #DDE1E4;
  border-left: none;
  background-color: #FFD012;
  cursor: pointer;

h4 {
  text-align: center;

/* Para ocultar la flecha del datalist en WebKit */

input::-webkit-calendar-picker-indicator {
  display: none;


                button = document.querySelector('button');
datalist = document.querySelector('datalist');
select = document.querySelector('select');
options = select.options;

/* Al hacer clic en el botón de flecha, mostrar/ocultar el DDL */
button.addEventListener('click', toggle_ddl);

function toggle_ddl() {
  if ( === '') { = 'block';
    this.textContent = "▲";
    /* Si el campo de entrada ya tiene un valor, seleccionar esa opción del DDL */
    var val = input.value;
    for (var i = 0; i < options.length; i++) {
      if (options[i].text === val) {
        select.selectedIndex = i;
  } else hide_select();

/* Cuando el usuario selecciona una opción del DDL, escribirla en el campo de texto */
select.addEventListener('change', fill_input);

function fill_input() {
  input.value = options[this.selectedIndex].value;

/* Cuando el usuario desea escribir en el campo de texto, ocultar el DDL */
input = document.querySelector('input');
input.addEventListener('focus', hide_select);

function hide_select() { = '';
  button.textContent = "▼";