update danmuku.js

packages/artplayer-plugin-danmuku/src/index.js

@@ -6,11 +6,10 @@ function checkVersion(art) {
         version,
         utils: { errorHandle },
     } = art.constructor;
-
     const arr = version.split('.').map(Number);
     const major = arr[0];
     const minor = arr[1] / 100;
-    errorHandle(major + minor >= 4.04, `弹幕库：Artplayer.js@${version} 版本不兼容，请更新到 4.4.x 版本以上`);
+    errorHandle(major + minor >= 4.04, `Artplayer.js@${version}不兼容该弹幕库，请更新到 4.4.x 版本以上`);
 }
 
 export default function artplayerPluginDanmuku(option) {
@@ -34,4 +33,6 @@ export default function artplayerPluginDanmuku(option) {
     };
 }
 
-window['artplayerPluginDanmuku'] = artplayerPluginDanmuku;
+if (typeof window !== 'undefined') {
+    window['artplayerPluginDanmuku'] = artplayerPluginDanmuku;
+}