Javascript Wordpress获取主题mod，functions.php

在我的functions.php中有以下内容：

function themename_customize_register($wp_customize){
//  =============================
    //  = Color Picker              =
    //  =============================
    $wp_customize->add_setting('themename_theme_options[link_color]', array(
        'default'           => '000',
        'sanitize_callback' => 'sanitize_hex_color',
        'capability'        => 'edit_theme_options',
        'type'           => 'option',
    ));
    $wp_customize->add_control( new WP_Customize_Color_Control($wp_customize, 'link_color', array(
        'label'    => __('Link Color', 'themename'),
        'section'  => 'themename_color_scheme',
        'settings' => 'themename_theme_options[link_color]',
    )));
}
add_action('customize_register', 'themename_customize_register');

//ADD THE GET_THEME_MOD SCRIPT HERE? IT DOESNT SEEM TO WORK. ON THE OTHER HAND, ADDING IT INSIDE, DOES NOT WORK EITHER.

我所要做的就是将默认值或所选值添加到标题中，这样CSS就会更新。 我如何获得该值