你可以用monkeypatchwp.customize.previewer.query 方法：

add_action( \'customize_controls_enqueue_scripts\', function () {
    wp_add_inline_script( \'customize-controls\', \'(function ( api ) {
        api.bind( "ready", function () {
            var _query = api.previewer.query;

            api.previewer.query = function () {
                var query = _query.call( this );
                query.foo = "bar";
                return query;
            };
        });
    })( wp.customize );\'
    );
});