在父构造参数中，如果ajax设置为true，js\\u vars将输出到页面的页脚。

/**
     * Constructor. The child class should call this constructor from it\'s own constructor
     *
     * @param array $args An associative array with information about the current table
     * @access protected
     */
    function __construct( $args = array() ) {
        $args = wp_parse_args( $args, array(
            \'plural\' => \'\',
            \'singular\' => \'\',
            \'ajax\' => false
        ) );

        $screen = get_current_screen();

        add_filter( "manage_{$screen->id}_columns", array( &$this, \'get_columns\' ), 0 );

        if ( !$args[\'plural\'] )
            $args[\'plural\'] = $screen->base;

        $args[\'plural\'] = sanitize_key( $args[\'plural\'] );
        $args[\'singular\'] = sanitize_key( $args[\'singular\'] );

        $this->_args = $args;

        if ( $args[\'ajax\'] ) {
            // wp_enqueue_script( \'list-table\' );
            add_action( \'admin_footer\', array( &$this, \'_js_vars\' ) );
        }
    }

/**
     * Send required variables to JavaScript land
     *
     * @access private
     */
    function _js_vars() {
        $current_screen = get_current_screen();

        $args = array(
            \'class\'  => get_class( $this ),
            \'screen\' => array(
                \'id\'   => $current_screen->id,
                \'base\' => $current_screen->base,
            )
        );

        printf( "<script type=\'text/javascript\'>list_args = %s;</script>\\n", json_encode( $args ) );
    }

你已经服用了吗a look on the WP_List_Table class Methods? 有ajax_response()...

• ajax_response() - 使用它来实现自定义权限规则集

  public function ajax_response()
  {
      return current_user_can( \'manage_options\' );
  }
  

• ajax_response() - 处理ajax回调/操作
• _js_vars() - 要在自定义ajax回调中使用的每个var。工程类似于wp_localize_script().