themes-wordpress/rebalance/inc/customizer.php

<?php
/**
 * Rebalance Theme Customizer.
 *
 * @package Rebalance
 */

/**
 * Implement Customizer additions and adjustments.
 *
 * @since Rebalance 1.0
 *
 * @param WP_Customize_Manager $wp_customize Customizer object.
 */
function rebalance_customize_register( $wp_customize ) {
	// Add postMessage support for site title and description.
	$wp_customize->get_setting( 'blogname' )->transport = 'postMessage';
	$wp_customize->get_setting( 'blogdescription' )->transport = 'postMessage';
	$wp_customize->get_setting( 'header_textcolor' )->transport = 'postMessage';
}
add_action( 'customize_register', 'rebalance_customize_register' );

/**
 * Bind JS handlers to make Theme Customizer preview reload changes asynchronously.
 *
 * @since Rebalance 1.0
 */
function rebalance_customize_preview_js() {
	wp_enqueue_script( 'rebalance_customizer', get_template_directory_uri() . '/js/customizer.js', array( 'customize-preview' ), '20131205', true );
}
add_action( 'customize_preview_init', 'rebalance_customize_preview_js' );