MC-18601: Page Builder Render

- IE11 issues

Author: davemacaulay

app/code/Magento/PageBuilder/Controller/Adminhtml/Stage/Render.php

@@ -38,7 +38,12 @@ public function execute()
             'stage_render'
         );
         $renderBlock->setTemplate('Magento_PageBuilder::stage/render.phtml');
-        $this->getResponse()->setBody($requireJs->toHtml() . $renderBlock->toHtml());
+        $babelPolyfill = $layout->createBlock(
+            \Magento\PageBuilder\Block\Adminhtml\Html\Head\BabelPolyfill::class,
+            'pagebuilder.babel.polyfill'
+        );
+        $babelPolyfill->setTemplate('Magento_PageBuilder::html/head/babel_polyfill.phtml');
+        $this->getResponse()->setBody($requireJs->toHtml() . $babelPolyfill->toHtml() . $renderBlock->toHtml());
         $this->getResponse()->sendResponse();
     }
 }

app/code/Magento/PageBuilder/view/adminhtml/templates/stage/render.phtml

@@ -6,38 +6,6 @@
 
 /** @var \Magento\PageBuilder\Block\Adminhtml\Stage\Render $block */
 ?>
-<script>
-    <?php
-    /**
-     * Shim localStorage within the iframe to ensure any calls from Magento API's do not fail due to same origin
-     * policies.
-     */
-    ?>
-    Object.defineProperty(
-        window,
-        'localStorage',
-        {
-            get: function () {
-                return {
-                    _data: {},
-                    setItem: function (id, val) {
-                        return this._data[id] = String(val);
-                    },
-                    getItem: function (id) {
-                        return this._data.hasOwnProperty(id) ? this._data[id] : null;
-                    },
-                    removeItem: function (id) {
-                        return delete this._data[id];
-                    },
-
-                    clear: function () {
-                        return this._data = {};
-                    }
-                };
-            }
-        }
-    );
-</script>
 <script src="<?= $block->escapeUrl($block->getRequireJsUrl()); ?>"></script>
 <script src="<?= $block->escapeUrl($block->getRequireJsConfigUrl()); ?>"></script>
 <script>

app/code/Magento/PageBuilder/view/adminhtml/web/js/master-format/render/frame.js

@@ -106,7 +106,6 @@ function render(message: {stageId: string, tree: TreeItem}) {
                 ko.cleanNode(element);
                 const filtered: JQuery = filterHtml($(element));
                 const output = decodeAllDataUrlsInString(filtered.html());
-                element.remove();
                 resolve(output);
             });
             ko.applyBindingsToNode(