添加react组件demo

packages/artplayer-react/README.md

@@ -4,7 +4,7 @@ React Component for Artplayer, It is recommended to package itself according to
 
 ## Demo
 
-[Checkout the demo](https://artplayer.org/react/) from Github Pages
+[Checkout the demo](https://codesandbox.io/s/n74859y9rl) from Github Pages
 
 ## Install
 

packages/artplayer-react/src/index.js

@@ -17,7 +17,7 @@ export default class ArtplayerComponent extends React.Component {
         const { option, getInstance } = this.props;
         this.instance = new Artplayer({
             ...option,
-            container: this.artRef,
+            container: this.artRef.current,
         });
 
         if (getInstance && typeof getInstance === 'function') {