Editor: Guard PostViewLink against post types without a labels object

packages/block-library/src/post-date/edit.js

@@ -210,7 +210,7 @@ export default function PostDateEdit( props ) {
 					<ToolsPanelItem
 						hasValue={ () => isLink !== false }
 						label={
-							postType?.labels.singular_name
+							postType?.labels?.singular_name
 								? sprintf(
 										// translators: %s: Name of the post type e.g: "post".
 										__( 'Link to %s' ),
@@ -223,7 +223,7 @@ export default function PostDateEdit( props ) {
 					>
 						<ToggleControl
 							label={
-								postType?.labels.singular_name
+								postType?.labels?.singular_name
 									? sprintf(
 											// translators: %s: Name of the post type e.g: "post".
 											__( 'Link to %s' ),

packages/block-library/src/post-featured-image/edit.js

@@ -295,7 +295,7 @@ export default function PostFeaturedImageEdit( {
 					>
 						<ToolsPanelItem
 							label={
-								postType?.labels.singular_name
+								postType?.labels?.singular_name
 									? sprintf(
 											// translators: %s: Name of the post type e.g: "post".
 											__( 'Link to %s' ),

packages/editor/src/components/post-card-panel/index.js

@@ -168,7 +168,7 @@ export default function PostCardPanel( {
 					{ sprintf(
 						// translators: %s: Name of the plural post type e.g: "Posts".
 						__( 'Changes will be applied to all selected %s.' ),
-						labels?.name.toLowerCase()
+						labels?.name?.toLowerCase()
 					) }
 				</WCText>
 			) }

packages/editor/src/components/post-type-support-check/test/index.js

@@ -54,6 +54,17 @@ describe( 'PostTypeSupportCheck', () => {
 		expect( container ).not.toHaveTextContent( 'Supported' );
 	} );
 
+	it( 'does not crash when the post type has no `supports` object', () => {
+		setupUseSelectMock( {} );
+		const { container } = render(
+			<PostTypeSupportCheck supportKeys="title">
+				Supported
+			</PostTypeSupportCheck>
+		);
+
+		expect( container ).not.toHaveTextContent( 'Supported' );
+	} );
+
 	it( 'renders its children when post type is known and supports', () => {
 		setupUseSelectMock( {
 			supports: {

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

@@ -58,7 +58,7 @@ export default function PostURL( { onClose } ) {
 			postSlug: safeDecodeURIComponent(
 				select( editorStore ).getEditedPostSlug()
 			),
-			viewPostLabel: postType?.labels.view_item,
+			viewPostLabel: postType?.labels?.view_item,
 			postLink: post.link,
 			permalinkPrefix: permalinkParts?.prefix,
 			permalinkSuffix: permalinkParts?.suffix,

packages/editor/src/components/post-view-link/index.js

@@ -24,7 +24,7 @@ export default function PostViewLink() {
 			return {
 				permalink: select( editorStore ).getPermalink(),
 				isPublished: select( editorStore ).isCurrentPostPublished(),
-				label: postType?.labels.view_item,
+				label: postType?.labels?.view_item,
 				hasLoaded: !! postType,
 				showIconLabels: get( 'core', 'showIconLabels' ),
 			};

packages/editor/src/components/post-view-link/test/index.js

@@ -0,0 +1,71 @@
+/**
+ * External dependencies
+ */
+import { render, screen } from '@testing-library/react';
+
+/**
+ * WordPress dependencies
+ */
+import { useSelect } from '@wordpress/data';
+
+/**
+ * Internal dependencies
+ */
+import PostViewLink from '../';
+
+jest.mock( '@wordpress/data/src/components/use-select', () => jest.fn() );
+
+const DEFAULTS = {
+	postType: { labels: { view_item: 'View Post' } },
+	permalink: 'https://example.com/sample/',
+	isPublished: true,
+	showIconLabels: false,
+};
+
+function setupUseSelectMock( overrides = {} ) {
+	// Use object spread (not destructure defaults) so an explicit `undefined`
+	// override actually overrides the default value.
+	const data = { ...DEFAULTS, ...overrides };
+	useSelect.mockImplementation( ( cb ) =>
+		cb( () => ( {
+			getCurrentPostType: () => 'post',
+			getPostType: () => data.postType,
+			getPermalink: () => data.permalink,
+			isCurrentPostPublished: () => data.isPublished,
+			get: () => data.showIconLabels,
+		} ) )
+	);
+}
+
+describe( 'PostViewLink', () => {
+	it( 'renders the post type-specific view label when available', () => {
+		setupUseSelectMock();
+		render( <PostViewLink /> );
+		expect( screen.getByLabelText( 'View Post' ) ).toBeInTheDocument();
+	} );
+
+	it( 'falls back to "View post" without crashing when the post type has no labels', () => {
+		// See https://github.com/WordPress/gutenberg/issues/62918.
+		setupUseSelectMock( { postType: {} } );
+		render( <PostViewLink /> );
+		expect( screen.getByLabelText( 'View post' ) ).toBeInTheDocument();
+	} );
+
+	it( 'renders nothing if the post is not published', () => {
+		setupUseSelectMock( { isPublished: false } );
+		const { container } = render( <PostViewLink /> );
+		expect( container ).toBeEmptyDOMElement();
+	} );
+
+	it( 'renders nothing if no permalink is available', () => {
+		setupUseSelectMock( { permalink: undefined } );
+		const { container } = render( <PostViewLink /> );
+		expect( container ).toBeEmptyDOMElement();
+	} );
+
+	it( 'renders nothing while the post type has not loaded', () => {
+		setupUseSelectMock( { postType: undefined } );
+		const { container } = render( <PostViewLink /> );
+		expect( container ).toBeEmptyDOMElement();
+	} );
+} );