Add documentation for PostAuthor, PostAuthorCheck, PostAuthorPanel components

packages/editor/README.md

@@ -801,15 +801,32 @@ _Returns_
 
 ### PostAuthor
 
-Undocumented declaration.
+Renders the component for selecting the post author.
+
+_Returns_
+
+-   `Component`: The component to be rendered.
 
 ### PostAuthorCheck
 
-Undocumented declaration.
+Wrapper component that renders its children only if the post type supports the author.
+
+_Parameters_
+
+-   _props_ `Object`: The component props.
+-   _props.children_ `Element`: Children to be rendered.
+
+_Returns_
+
+-   `Component|null`: The component to be rendered. Return `null` if the post type doesn't supports the author or if there are no authors available.
 
 ### PostAuthorPanel
 
-Undocumented declaration.
+Renders the Post Author Panel component.
+
+_Returns_
+
+-   `Component`: The component to be rendered.
 
 ### PostComments
 

packages/editor/src/components/post-author/check.js

@@ -11,6 +11,15 @@ import PostTypeSupportCheck from '../post-type-support-check';
 import { store as editorStore } from '../../store';
 import { AUTHORS_QUERY } from './constants';
 
+/**
+ * Wrapper component that renders its children only if the post type supports the author.
+ *
+ * @param {Object}  props          The component props.
+ * @param {Element} props.children Children to be rendered.
+ *
+ * @return {Component|null} The component to be rendered. Return `null` if the post type doesn't
+ * supports the author or if there are no authors available.
+ */
 export default function PostAuthorCheck( { children } ) {
 	const { hasAssignAuthorAction, hasAuthors } = useSelect( ( select ) => {
 		const post = select( editorStore ).getCurrentPost();

packages/editor/src/components/post-author/index.js

@@ -13,6 +13,11 @@ import { AUTHORS_QUERY } from './constants';
 
 const minimumUsersForCombobox = 25;
 
+/**
+ * Renders the component for selecting the post author.
+ *
+ * @return {Component} The component to be rendered.
+ */
 function PostAuthor() {
 	const showCombobox = useSelect( ( select ) => {
 		const authors = select( coreStore ).getUsers( AUTHORS_QUERY );

packages/editor/src/components/post-author/panel.js

@@ -5,6 +5,11 @@ import PostAuthorCheck from './check';
 import PostAuthorForm from './index';
 import PostPanelRow from '../post-panel-row';
 
+/**
+ * Renders the Post Author Panel component.
+ *
+ * @return {Component} The component to be rendered.
+ */
 export function PostAuthor() {
 	return (
 		<PostAuthorCheck>