customizer enqueue 1

function mytheme_customizer_controls_js() {
   wp_enqueue_script( 'mytheme_customizer_controls', get_template_directory_uri() . '/js/customizer-controls.js', array( 'jquery' ), '20160321', true );
}
add_action( 'customize_controls_enqueue_scripts', 'mytheme_customizer_controls_js' );