How to create a dynamic search box?

Question

How to create a dynamic search box?

On this site - http://www.euescolhiesperar.com / - when you type in the search box, the results appear instantly without having to press enter. How can I do this on Blogger?

Thank you!

0

html javascript busca teclado

Author: winiercape, 2018-09-28

Source

1 answers

score 3 · Answer 1

You can listen to the event keyup from the input and run the search after that.

Example:

var search = document.getElementById('search');
var log = document.getElementById('log');

/*
  - keyup é lançado a cada tecla pressionada no input
*/
search.addEventListener('keyup', function() {
  // Cria um <li> e adiciona na <ul> apenas para exemplificar
  var li = document.createElement('li');
  li.innerHTML = "Pesquisando: " + this.value;
  log.insertBefore(li, log.firstChild);
});

<input id="search">
<hr>
<ul id="log"></ul>

For performance reasons, you can do a debounce in the event to not perform many searches at the same time (example of debounce and throttle ).

In the following example, I am using the debounce function from the lodash library for reasons of practicality:

var search = document.getElementById('search');
var log = document.getElementById('log');

/*
  - keyup é lançado a cada tecla pressionada no input
  - debounce faz com que a função só executa depois que
o usuário parar de digitar por 1 segundo
*/
search.addEventListener('keyup', _.debounce(function() {
  // Cria um <li> e adiciona na <ul> apenas para exemplificar
  var li = document.createElement('li');
  li.innerHTML = "Pesquisando: " + this.value;
  log.insertBefore(li, log.firstChild);
}, 1000));

<script src="https://unpkg.com/[email protected]/lodash.min.js"></script>

<input id="search">
<hr>
<ul id="log"></ul>