From d6245d285e11afc7e63eebcfbf99f3cf00804c31 Mon Sep 17 00:00:00 2001
From: Jiaxun Wei <leuisken@gmail.com>
Date: Mon, 30 Dec 2019 07:40:03 +0800
Subject: [PATCH] fix: add 'allow-forms' to sandbox attribute. (#87334)

Extensions like "mtxr.sqltools" using form to update configuration, this patch will help them to work with the VS Online Web Edition.
---
 src/vs/workbench/contrib/webview/browser/webviewElement.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/vs/workbench/contrib/webview/browser/webviewElement.ts b/src/vs/workbench/contrib/webview/browser/webviewElement.ts
index ab0760b511f..03133778a0b 100644
--- a/src/vs/workbench/contrib/webview/browser/webviewElement.ts
+++ b/src/vs/workbench/contrib/webview/browser/webviewElement.ts
@@ -61,7 +61,7 @@ export class IFrameWebview extends BaseWebview<HTMLIFrameElement> implements Web
 	protected createElement(options: WebviewOptions) {
 		const element = document.createElement('iframe');
 		element.className = `webview ${options.customClasses || ''}`;
-		element.sandbox.add('allow-scripts', 'allow-same-origin');
+		element.sandbox.add('allow-scripts', 'allow-same-origin', 'allow-forms');
 		element.setAttribute('src', `${this.externalEndpoint}/index.html?id=${this.id}`);
 		element.style.border = 'none';
 		element.style.width = '100%';