Merge branch 'dev_aliyun' of https://bdgit.educoder.net/Hjqreturn/educoder into topic_bank

public/react/src/App.js

@@ -346,7 +346,7 @@ class App extends Component {
 		}
 	}
 	disableVideoContextMenu = () => {
-		window.$( "body" ).on( "mousedown", "video",  function() {
+		window.$( "body" ).on( "mousedown", "video",  function(event) {
 			if(event.which === 3) {
 				window.$('video').bind('contextmenu',function () { return false; });
 			} else {