change-wordpress-control-value-programmatically.php

function km_enqueue_customizer_scripts() {
    global $wp_customize;

    if ( ! isset( $wp_customize ) ) {
        return;
    }

    wp_enqueue_script( 'customizer_scripts', PLUGIN_URL . 'assets/js/customizer_scripts.js', 'jquery' );
}
add_action( 'admin_enqueue_scripts', 'km_enqueue_customizer_scripts' );