How to add new panel under "document" in Gutenberg - wordpress

Question

I am trying to add a new component panel under document tab, like categories, featured image etc.

Answer 1

They've added the PluginDocumentSettingPanel SlotFill now.
const { registerPlugin } = wp.plugins
const { PluginDocumentSettingPanel } = wp.editPost
const PluginDocumentSettingPanelDemo = () => (
<PluginDocumentSettingPanel
name="custom-panel"
title="Custom Panel"
className="custom-panel"
>
Custom Panel Contents
</PluginDocumentSettingPanel>
)
registerPlugin('plugin-document-setting-panel-demo', {
render: PluginDocumentSettingPanelDemo
})

Answer 2

add_meta_box will do the trick, but only if you add the context-argument with a value of 'side':
add_meta_box(
'box-id-here',
'Box Title Here',
'createBoxHtml',
'post',
'side' ); // <-- this is important
Arrrh, two days for nothing!
Old answer
According to this tutorial, we can add our custom sidebar and fill it with customized form inputs.
Here is a working example in a React JSX version. This adds a meta field country:
const { registerPlugin } = wp.plugins;
const { PluginSidebar } = wp.editPost;
const { TextControl } = wp.components;
const { withSelect, withDispatch } = wp.data;
// Customized TextControl
const CustomMetaField = withDispatch( ( dispatch, props ) => {
return {
updateMetaValue: ( v ) => {
dispatch( 'core/editor' ).editPost( {
meta: {
[ props.metaFieldName ]: v
}
});
}
};
})( withSelect( ( select, props ) => {
return {
[ props.metaFieldName ]: select( 'core/editor' ).getEditedPostAttribute( 'meta' )[ props.metaFieldName ]
};
} )( ( props ) => (
<TextControl
value={props[ props.metaFieldName ] }
label="Country"
onChange={( v ) => {
props.updateMetaValue( v );
}}
/> )
) );
// Our custom sidebar
registerPlugin( 'custom-sidebar', {
render() {
return (
<PluginSidebar
name="project-meta-sidebar"
title="Project Meta">
<div className="plugin-sidebar-content">
<CustomMetaField metaFieldName="country" />
</div>
</PluginSidebar>
);
},
} );
And in PHP, register the meta field in the init-hook:
register_meta( 'post', 'country', [
'show_in_rest' => TRUE,
'single' => TRUE,
'type' => 'string'
] );
I know:
This is still not the required solution, but nearly.

Answer 3

You can now use the newer useSelect and useDispatch custom hooks. They are similar to withSelect and withDispatch, but utilize custom hooks from React 16.8 for a slightly more concise dev experience:
(Also, using #wordpress/scripts, so the imports are from the npm packages instead of the wp object directly, but either would work.)
import { __ } from '#wordpress/i18n';
import { useSelect, useDispatch } from '#wordpress/data';
import { PluginDocumentSettingPanel } from '#wordpress/edit-post';
import { TextControl } from '#wordpress/components';
const TextController = (props) => {
const meta = useSelect(
(select) =>
select('core/editor').getEditedPostAttribute('meta')['_myprefix_text_metafield']
);
const { editPost } = useDispatch('core/editor');
return (
<TextControl
label={__("Text Meta", "textdomain")}
value={meta}
onChange={(value) => editPost({ meta: { _myprefix_text_metafield: value } })}
/>
);
};
const PluginDocumentSettingPanelDemo = () => {
return (
<PluginDocumentSettingPanel
name="custom-panel"
title="Custom Panel"
className="custom-panel"
>
<TextController />
</PluginDocumentSettingPanel>
);
};
export default PluginDocumentSettingPanelDemo;
Along with registering your meta field as usual:
function myprefix_register_meta()
{
register_post_meta('post', '_myprefix_text_metafield', array(
'show_in_rest' => true,
'type' => 'string',
'single' => true,
'sanitize_callback' => 'sanitize_text_field',
'auth_callback' => function () {
return current_user_can('edit_posts');
}
));
}
add_action('init', 'myprefix_register_meta');
And make sure if using for a custom post type, that you include custom-fields in the array of supports:
'supports' => array('title', 'editor', 'thumbnail', 'revisions', 'custom-fields'),
Hopefully that helps.

Answer 4

You can add this code to your function.php. This code create new tab and add text field to this tab. Text field save to database like custom field in post_meta table and you can output this like default WP post meta.
1. Create tab Настройки UTM.
2. Create custom text field utm_post_class
3. To output in website use $utm = get_post_meta( $post->ID, 'utm_post_class', true );
//Article UTM Link
add_action( 'load-post.php', 'utm_post_meta_boxes_setup' );
add_action( 'load-post-new.php', 'utm_post_meta_boxes_setup' );
function utm_post_meta_boxes_setup() {
add_action( 'add_meta_boxes', 'utm_add_post_meta_boxes' );
add_action( 'save_post', 'utm_save_post_class_meta', 10, 2 );
}
function utm_add_post_meta_boxes() {
add_meta_box(
'utm-post-class',
'Настройки UTM',
'utm_post_class_meta_box',
'post',
'side',
'default'
);
}
function utm_post_class_meta_box( $post ) {
wp_nonce_field( basename( __FILE__ ), 'utm_post_class_nonce' );?>
<div class="components-base-control editor-post-excerpt__textarea">
<div class="components-base-control__field">
<label class="components-base-control__label" for="utm-post-class">UTM ссылка (необязательно)</label>
<input type="text" name="utm-post-class" id="utm-post-class" class="edit-post-post-schedule" value="<?php echo esc_attr( get_post_meta( $post->ID, 'utm_post_class', true ) ); ?>">
</div>
</div>
<?php }
function utm_save_post_class_meta( $post_id, $post ) {
if ( !isset( $_POST['utm_post_class_nonce'] ) || !wp_verify_nonce( $_POST['utm_post_class_nonce'], basename( __FILE__ ) ) )
return $post_id;
$post_type = get_post_type_object( $post->post_type );
if ( !current_user_can( $post_type->cap->edit_post, $post_id ) )
return $post_id;
$new_meta_value = ( isset( $_POST['utm-post-class'] ) ? $_POST['utm-post-class'] : '' );
$meta_key = 'utm_post_class';
$meta_value = get_post_meta( $post_id, $meta_key, true );
if ( $new_meta_value && '' == $meta_value )
add_post_meta( $post_id, $meta_key, $new_meta_value, true );
elseif ( $new_meta_value && $new_meta_value != $meta_value )
update_post_meta( $post_id, $meta_key, $new_meta_value );
elseif ( '' == $new_meta_value && $meta_value )
delete_post_meta( $post_id, $meta_key, $meta_value );
}

Answer 5

add_meta_box adds a new panel there for the gutenberg editor