Html field layout element

Resolves #10714

CHANGELOG.md

@@ -6,6 +6,7 @@
 - Added `craft\base\Element::notesFieldHtml()`.
 - Added `craft\base\Element::statusFieldHtml()`.
 - Added `craft\events\DefineAssetThumbUrlEvent`, which replaces `GetAssetThumbUrlEvent` (previously removed).
+- Added `craft\fieldlayoutelements\Html`. ([#10714](https://github.com/craftcms/cms/discussions/10714))
 - Added `craft\services\Assets::EVENT_DEFINE_THUMB_URL`, which replaces `craft\services\Assets::EVENT_GET_ASSET_THUMB_URL` (previously removed).
 
 ### Changed

src/fieldlayoutelements/Html.php

@@ -0,0 +1,50 @@
+<?php
+/**
+ * @link https://craftcms.com/
+ * @copyright Copyright (c) Pixel & Tonic, Inc.
+ * @license https://craftcms.github.io/license/
+ */
+
+namespace craft\fieldlayoutelements;
+
+use craft\base\ElementInterface;
+use craft\base\FieldLayoutElement;
+use craft\helpers\Html as HtmlHelper;
+use yii\base\NotSupportedException;
+
+/**
+ * Html represents a field layout component that displays arbitrary HTML.
+ *
+ * @author Pixel & Tonic, Inc. <support@pixelandtonic.com>
+ * @since 3.5.0
+ */
+class Html extends FieldLayoutElement
+{
+    private string $html;
+
+    /**
+     * Constructor
+     */
+    public function __construct(string $html, array $config = [])
+    {
+        $this->html = $html;
+        parent::__construct($config);
+    }
+
+    /**
+     * @inheritdoc
+     * @throws NotSupportedException
+     */
+    public function selectorHtml(): string
+    {
+        throw new NotSupportedException(sprintf('%s should not be included in user-modifyable field layouts.', __CLASS__));
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function formHtml(?ElementInterface $element = null, bool $static = false): ?string
+    {
+        return HtmlHelper::tag('div', $this->html);
+    }
+}