Get data from a field using query in Computed field and use it as an array
You can pass any value of node or something else in jquery like

$node_id = 5;
$node = node_load($node_id);
$settings = array(
    'title' =&gt; $node-&gt;title,
    'custom-data' =&gt; 'ABC',
);
drupal_add_js(array('mymodule' =&gt; $settings), 'setting');
drupal_add_js(drupal_get_path('module', 'mymodule') . '/js/mymodule.js', 'file');


And get that value in jquery like (you have to put this code in mymodule.js)

(function($) {
        Drupal.behaviors.mymodule = {
            attach: function(context, settings) {            
                var title = Drupal.settings.mymodule.title;
                console.log(title); // or perform some operation as you prefer
                var custom_data = Drupal.settings.mymodule.custom-data;
                console.log(custom_data );
            }
        };
    }(jQuery));