From b8178e92b4c50c4bb616362078bc3d03d2dcf275 Mon Sep 17 00:00:00 2001
From: Niklas von Hertzen <niklasvh@gmail.com>
Date: Thu, 7 Dec 2017 15:47:42 +0800
Subject: [PATCH] Add deprecation warning for onrendered (Fix #1290)

---
 src/index.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/index.js b/src/index.js
index 0279c09..01e016e 100644
--- a/src/index.js
+++ b/src/index.js
@@ -39,6 +39,12 @@ const html2canvas = (element: HTMLElement, conf: ?Options): Promise<*> => {
     const config = conf || {};
     const logger = new Logger();
 
+    if (__DEV__ && typeof config.onrendered === 'function') {
+        logger.error(
+            `onrendered option is deprecated, html2canvas returns a Promise with the canvas as the value`
+        );
+    }
+
     const ownerDocument = element.ownerDocument;
     if (!ownerDocument) {
         return Promise.reject(`Provided element is not within a Document`);