CakePHP ajax example with jQuery

LanguagesController.php

<?php
// src/Controller/LanguagesController.php
namespace App\Controller;

use App\Controller\AppController;

class LanguagesController extends AppController
{
    public function index()
    {
        $languages = $this->paginate($this->Languages);

        $this->set(compact('languages'));
        $this->set('_serialize', ['languages']);
    }
}

search.ctp

<?php
// src/Template/Languages/search.ctp
echo $this->Html->script('search.js', ['block' => true]);
?>

<?= $this->Form->create($languages) ?>
<?= $this->Form->control('name', ['url' => 'languages/search']) ?>
<?= $this->Form->end() ?>

search.js

$(function() {
    $('#name').on('blur', function() {
        $.ajax({
            type: 'POST',
            url: $('form').attr('action'),
            dataType : 'json',
            data: {name : $('#name').val()},
            success: function(data, textStatus, jqXHR) {
                // do whatever you want
            },
            error: function(jqXHR, textStatus, errorThrown) {
                // do whatever you want
            }
        });
    });
});