This example demonstrates how to extend the WordPress block editor by adding a custom sidebar panel using the PluginSidebar component. The sidebar includes a text input field that saves data to post meta, showcasing the integration between the block editor's UI components and WordPress data management.

Key concepts covered:

• Plugin Sidebar implementation
• Post meta data integration
• WordPress components usage
• SlotFill system utilization
• Custom UI panel creation

Example	Description	Tags	Download .zip	Live Demo
Plugin Sidebar	Shows how to add a custom sidebar to the editor using SlotFill and integrate it with post meta data.	slotfill meta no-block	📦

1. Plugin Registration

   • Register plugin with registerPlugin
   • Configure sidebar settings
   • Set up meta field integration
   • Define UI components

2. Meta Field Setup

   • Register meta field with register_post_meta
   • Configure REST API access
   • Set up data persistence
   • Handle permissions

1. Plugin Registration

   import { registerPlugin } from '@wordpress/plugins';
   import { PluginSidebar } from '@wordpress/edit-post';
   
   registerPlugin( 'sidebar-plugin', {
   	render: () => (
   		<PluginSidebar
   			name="sidebar-plugin"
   			title="My Plugin Sidebar"
   			icon="admin-post"
   		>
   			// Sidebar content
   		</PluginSidebar>
   	),
   } );

2. Meta Integration

   import { useEntityProp } from '@wordpress/core-data';
   import { TextControl } from '@wordpress/components';
   
   const [ metaValue, setMetaValue ] = useEntityProp(
   	'postType',
   	'post',
   	'sidebar_plugin_meta_block_field'
   );

1. Main Components Used

   • @wordpress/edit-post: Provides PluginSidebar
   • @wordpress/components: UI components
   • @wordpress/core-data: Data management
   • @wordpress/plugins: Plugin registration

2. Meta Field Configuration

   register_post_meta('post', 'sidebar_plugin_meta_block_field', [
       'show_in_rest' => true,
       'single' => true,
       'type' => 'string'
   ]);

• Follow WordPress component guidelines
• Implement proper data persistence
• Handle loading and error states
• Consider user permissions
• Maintain consistent UI/UX

• Plugin Sidebar Documentation
• WordPress Components
• Data Management
• Plugin API
• SlotFill System

Note Check the Start Guide for local development with the examples