Merge commit 'be3e8236086165e5e45a5a10783823874b3f3ebd' as 'lib/vscode'

lib/vscode/extensions/vscode-notebook-tests/src/customRenderer.js

@@ -0,0 +1,21 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+const vscode = acquireVsCodeApi();
+
+vscode.postMessage({
+	type: 'custom_renderer_initialize',
+	payload: {
+		firstMessage: true
+	}
+});
+
+const notebook = acquireNotebookRendererApi('notebookCoreTestRenderer');
+
+notebook.onDidCreateOutput(({ element, mimeType }) => {
+	const div = document.createElement('div');
+	div.innerText = `Hello ${mimeType}!`;
+	element.appendChild(div);
+});