--- /dev/null
+<?php
+
+namespace Drupal\views\Ajax;
+
+use Drupal\Core\Ajax\CommandInterface;
+
+/**
+ * Provides an AJAX command for replacing the page title.
+ *
+ * This command is implemented in Drupal.AjaxCommands.prototype.viewsReplaceTitle.
+ */
+class ReplaceTitleCommand implements CommandInterface {
+
+ /**
+ * The page title to replace.
+ *
+ * @var string
+ */
+ protected $title;
+
+ /**
+ * Constructs a \Drupal\views\Ajax\ReplaceTitleCommand object.
+ *
+ * @param string $title
+ * The title of the page.
+ */
+ public function __construct($title) {
+ $this->title = $title;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function render() {
+ return [
+ 'command' => 'viewsReplaceTitle',
+ 'selector' => $this->title,
+ ];
+ }
+
+}