Well, I actually did it like this:
<?php
function my_scripts_method() {
wp_enqueue_script(
'custom-script',
get_stylesheet_directory_uri() . '/js/custom_script.js',
array('jquery')
);
}
add_action('wp_enqueue_scripts', 'my_scripts_method');
?>
This code ended in my child-theme functions.php file.
It didn’t work 🙂 but, it’s showing out in head section so problem is somewhere else … 🙁