Fix archive RSVP styles and form block compatibility

includes/class-webmention.php

@@ -188,7 +188,7 @@ public function register_constants() {
 	 * Enqueue scripts.
 	 */
 	public function enqueue_scripts() {
-		if ( is_singular() ) {
+		if ( is_singular() || is_home() || is_archive() ) {
 			wp_enqueue_style( self::TEXT_DOMAIN, WEBMENTION_PLUGIN_URL . 'assets/css/webmention.css', array(), $this->get_version() );
 		}
 	}

src/form/index.js

@@ -1,10 +1,16 @@
+/*
+ * @jsxRuntime classic
+ * @jsx createElement
+ */
+
 /**
  * Webmention Form block.
  *
  * Rendered on the server by the same template as the classic comment form,
  * the editor only shows a static preview.
  */
 import { registerBlockType } from '@wordpress/blocks';
+import { createElement } from '@wordpress/element';
 import { useBlockProps } from '@wordpress/block-editor';
 import { __ } from '@wordpress/i18n';
 

tests/phpunit/tests/class-test-webmention.php

@@ -9,6 +9,30 @@
  * Test Webmention class.
  */
 class Test_Webmention extends WP_UnitTestCase {
+	/**
+	 * Test that post content keeps its styles on singular, home, and archive views.
+	 */
+	public function test_content_styles_are_enqueued() {
+		$category_id = self::factory()->category->create();
+		$post_id     = self::factory()->post->create( array( 'post_category' => array( $category_id ) ) );
+		$urls        = array(
+			get_permalink( $post_id ),
+			home_url( '/?post_type=post' ),
+			get_category_link( $category_id ),
+		);
+
+		try {
+			foreach ( $urls as $url ) {
+				wp_dequeue_style( 'webmention' );
+				$this->go_to( $url );
+				\Webmention\Webmention::get_instance()->enqueue_scripts();
+				$this->assertTrue( wp_style_is( 'webmention', 'enqueued' ), $url );
+			}
+		} finally {
+			wp_dequeue_style( 'webmention' );
+		}
+	}
+
 	/**
 	 * Test that constants are registered.
 	 */