添加部分可配置图标

docs/lab/js/index.js

@@ -106,6 +106,9 @@ var art = new Artplayer({
             },
         },
     ],
+    icons: {
+        loading: '<img src="https://static.hdslb.com/player/images/ploading.gif">',
+    },
     plugins: [artplayerPluginSubtitle]
 });