WordPress 技巧：只在含有联系表单的页面加载 Contact Form 7 的 JS 和 CSS

add_action ( 'wp_enqueue_scripts', 'wpjam_cf7_enqueue_scripts', 99 );
function wpjam_cf7_enqueue_scripts(){
	wp_dequeue_script('contact-form-7');
	if(is_page('contact')){
		$in_footer = true;
		if ( 'header' === WPCF7_LOAD_JS )
			$in_footer = false;
		wp_enqueue_script( 'contact-form-7',
			wpcf7_plugin_url( 'includes/js/scripts.js' ),
			array( 'jquery', 'jquery-form' ), WPCF7_VERSION, $in_footer );
	}
}

add_action( 'wp_enqueue_scripts', 'wpjam_cf7_enqueue_styles', 99 );
function wpjam_cf7_enqueue_styles() {
	wp_dequeue_style('contact-form-7');
	if(is_page('contact')){
		wp_enqueue_style( 'contact-form-7',
			wpcf7_plugin_url( 'includes/css/styles.css' ),
			array(), WPCF7_VERSION, 'all' );
	}
}