add function to hide the block theme comment section to prevent it fr…

…om showing briefly before disqus loads. this function is tied to the comment_form_before wordpress action.

disqus/includes/class-disqus.php

@@ -180,6 +180,7 @@ private function define_public_hooks() {
         $this->loader->add_filter( 'comments_number', $plugin_public, 'dsq_comments_link_template' );
         $this->loader->add_filter( 'comments_template', $plugin_public, 'dsq_comments_template' );
         $this->loader->add_action( 'wp_enqueue_scripts', $plugin_public, 'enqueue_comment_count' );
+        $this->loader->add_action( 'comment_form_before', $plugin_public, 'hide_block_theme_comment_section');
         $this->loader->add_action( 'wp_enqueue_scripts', $plugin_public, 'enqueue_comment_embed' );
         $this->loader->add_action( 'show_user_profile', $plugin_public, 'dsq_close_window_template' );
     }

disqus/public/class-disqus-public.php

@@ -238,6 +238,22 @@ public function enqueue_comment_embed() {
 		}
 	}
 
+    /**
+	 * Hides the comment section block for WP block themes.
+     * This prevents the WP block comment section from appearing briefly before being replaced by Disqus.
+	 *
+	 * @since    3.0
+	 */
+	public function hide_block_theme_comment_section() {
+		?>
+            <style>
+                .wp-block-comments {
+                    display: none;
+                }
+            </style>
+        <?php
+	}
+
 	/**
 	 * Determines if Disqus is configured and can load on a given page.
 	 *