我已在修改了教程https://wordpress.org/gutenberg/handbook/designers-developers/developers/tutorials/plugin-sidebar-0/ 满足ES6+的要求，但我很难将其实际保存到帖子中。每当我刷新页面时，该值就会消失。

Addendum: 使用时wp.data.select(\'core/editor\').getEditedPostAttribute(\'meta\')[\'library_plugin_alternate_title\']; 为了验证控制台中元的内容，我成功地返回了"test" 这告诉我，它确实按照预期在编辑器中更新了meta。但是，由于某些原因，该值实际上没有保存到数据库中。我假设它会在wp_postmeta 但我没有看到它这样做。

下面是我在PHP中的当前代码，在plugins_loaded 行动电话：

class RegisterSidebar
{
    /**
     * RegisterSidebar constructor.
     */
    public function __construct()
    {
        add_action(\'init\', [__CLASS__, \'registerScript\']);
        add_action(\'enqueue_block_editor_assets\', [__CLASS__, \'loadScriptsToEditor\']);
        add_action(\'enqueue_block_assets\', [__CLASS__, \'loadStylesToEditor\']);
    }

    /**
     * Load the files into the editor.
     */
    public static function loadScriptsToEditor(): void
    {
        wp_enqueue_script(\'plugin-sidebar\');
    }

    /**
     * Load the files into the editor.
     */
    public static function loadStylesToEditor(): void
    {
        wp_enqueue_style(\'plugin-sidebar\');
    }

    /**
     * Adding the script so that the plugin sidebar loads.
     */
    public static function registerScript(): void
    {
        wp_register_script(
            \'plugin-sidebar\',
            LIBRARY_PLUGIN_URI . \'/assets/js/sidebar.js\',
            [\'wp-plugins\', \'wp-edit-post\', \'wp-element\', \'wp-components\', \'wp-compose\']
        );
        wp_register_style(
            \'plugin-sidebar\',
            LIBRARY_PLUGIN_URI . \'/assets/css/sidebar.css\'
        );
        register_meta(\'post\', \'library_plugin_alternate_title\', [
            \'show_in_rest\' => true,
            \'single\' => true,
            \'type\' => \'string\',
        ]);
    }
}

以及使用react在Web包中运行的JavaScript：

import PluginIcon from \'./plugin-icon\';
const { registerPlugin } =  window.wp.plugins;
const { PluginSidebar } = window.wp.editPost;
const { TextControl } = window.wp.components;
const { withDispatch, withSelect } = window.wp.data;
const { compose } = window.wp.compose;

let MetaBlockField = compose(
  withDispatch((dispatch, props) => {
    return {
      setMetaFieldValue: (value) => {
        dispatch(\'core/editor\').editPost({meta: {[props.fieldName]: value}});
      }
    };
  }),
  withSelect((select, props) => {
    return {
      metaFieldValue: select(\'core/editor\')
        .getEditedPostAttribute(\'meta\')
        [props.fieldName]
    };
  })
)(({ metaFieldValue, setMetaFieldValue }) => {
  return (
    <TextControl
      label="Alternate Display Title"
      value={ metaFieldValue }
      onChange={(content) => setMetaFieldValue(content)}
    />
  );
});

registerPlugin(\'plugin-sidebar\', {
  render() {
    return (
      <PluginSidebar
        name="plugin-sidebar"
        icon={ PluginIcon }
        title="Library Plugin Sidebar"
      >
        <div className="plugin-sidebar-content">
          <MetaBlockField fieldName="library_plugin_alternate_title"/>
        </div>
      </PluginSidebar>
    );
  }
});

如果你看到我遗漏了什么，请告诉我。非常感谢您提前提供的帮助！

Tests Done After Initial Post:

将元字段名称更改为_library_plugin_alternate_title 并添加\'auth_callback\' => function () { return current_user_can(\'edit_posts\'); } 到register_meta() 函数调用，以防权限问题auth_callback 中的属性register_meta() 呼叫register_meta() 函数调用到RegisterSidebar 构造函数，以便在加载插件时运行。将其返回给registerScript() 方法，当该方法不起作用时