magento
diff --git a/‎app/code/Magento/PageBuilder/Block/Adminhtml/Html/Head/BabelPolyfill.php
Lines changed: 89 additions & 0 deletions b/‎app/code/Magento/PageBuilder/Block/Adminhtml/Html/Head/BabelPolyfill.php
Lines changed: 89 additions & 0 deletions
diff --git a/‎app/code/Magento/PageBuilder/view/adminhtml/layout/editor.xml
Lines changed: 3 additions & 0 deletions b/‎app/code/Magento/PageBuilder/view/adminhtml/layout/editor.xml
Lines changed: 3 additions & 0 deletions
diff --git a/‎app/code/Magento/PageBuilder/view/adminhtml/templates/html/container.phtml
Lines changed: 10 additions & 0 deletions b/‎app/code/Magento/PageBuilder/view/adminhtml/templates/html/container.phtml
Lines changed: 10 additions & 0 deletions
diff --git a/‎app/code/Magento/PageBuilder/view/adminhtml/templates/html/head/babel_polyfill.phtml
Lines changed: 12 additions & 0 deletions b/‎app/code/Magento/PageBuilder/view/adminhtml/templates/html/head/babel_polyfill.phtml
Lines changed: 12 additions & 0 deletions
@@ -0,0 +1,89 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+declare(strict_types=1);
+
+namespace Magento\PageBuilder\Block\Adminhtml\Html\Head;
+
+use Magento\Framework\View\Element\Template;
+
+/**
+ * Babel polyfill is required for IE 11 compatibility
+ *
+ * @api
+ */
+class BabelPolyfill extends Template
+{
+    /**
+     * @var \Magento\PageBuilder\Model\ConfigInterface
+     */
+    private $config;
+
+    /**
+     * @var \Magento\Framework\HTTP\Header
+     */
+    private $httpHeader;
+
+    /**
+     * @param Template\Context $context
+     * @param \Magento\PageBuilder\Model\ConfigInterface $config
+     * @param \Magento\Framework\HTTP\Header $httpHeader
+     * @param array $data
+     */
+    public function __construct(
+        Template\Context $context,
+        \Magento\PageBuilder\Model\ConfigInterface $config,
+        \Magento\Framework\HTTP\Header $httpHeader,
+        array $data = []
+    ) {
+        $this->config = $config;
+        $this->httpHeader = $httpHeader;
+        parent::__construct($context, $data);
+    }
+
+    /**
+     * Detect if Page Builder is enabled and the user is loading the website from IE 11
+     *
+     * @return bool
+     */
+    public function shouldLoadPolyfill() : bool
+    {
+        return $this->config->isEnabled() && $this->isIe11();
+    }
+
+    /**
+     * Build and return the polyfill static URL
+     *
+     * @return string
+     */
+    public function getJsUrl() : string
+    {
+        return $this->_assetRepo->getUrl("Magento_PageBuilder::js/resource/babel/polyfill.min.js");
+    }
+
+    /**
+     * Extend the cache keys with a IE 11 flag
+     *
+     * @return array
+     */
+    public function getCacheKeyInfo() : array
+    {
+        $cacheKeys = parent::getCacheKeyInfo();
+        $cacheKeys['is_ie11'] = $this->isIe11();
+        return $cacheKeys;
+    }
+
+    /**
+     * Detect if the browser user agent contains the IE 11 user agent
+     *
+     * @return bool
+     */
+    private function isIe11() : bool
+    {
+        return strpos($this->httpHeader->getHttpUserAgent(), 'rv:11.0') !== false
+            && strpos($this->httpHeader->getHttpUserAgent(), 'Trident/7.0;') !== false;
+    }
+}
@@ -7,6 +7,9 @@
 -->
 <page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="admin-1column" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
     <body>
+        <block class="Magento\Framework\View\Element\Template" name="head.additional" as="head.additional" template="Magento_PageBuilder::html/container.phtml">
+            <block class="Magento\PageBuilder\Block\Adminhtml\Html\Head\BabelPolyfill" name="pagebuilder.babel.polyfill" as="pagebuilder.babel.polyfill" template="Magento_PageBuilder::html/head/babel_polyfill.phtml"/>
+        </block>
         <referenceContainer name="before.body.end">
             <uiComponent name="pagebuilder_modal_form" />
         </referenceContainer>
 
@@ -0,0 +1,10 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+// @codingStandardsIgnoreFile
+
+?>
+<?= $block->getChildHtml() ?>
@@ -0,0 +1,12 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+/* @var $block \Magento\PageBuilder\Block\Adminhtml\Html\Head\BabelPolyfill */
+
+if ($block->shouldLoadPolyfill()) : ?>
+<script src="<?= $block->escapeUrl($block->getJsUrl()) ?>"></script>
+<?php endif; ?>
+