提取共用方法

packages/artplayer/src/notice.js

@@ -1,3 +1,5 @@
+import { addClass, removeClass } from './utils';
+
 export default class Notice {
     constructor(art) {
         this.art = art;
@@ -7,7 +9,7 @@ export default class Notice {
     show(msg, autoHide = true, time = 1000) {
         const { $player, $noticeInner } = this.art.template;
         this.state = true;
-        $player.classList.add('artplayer-notice-show');
+        addClass($player, 'artplayer-notice-show');
         $noticeInner.innerHTML = msg instanceof Error ? msg.message.trim() : msg;
         clearTimeout(this.timer);
         if (autoHide) {
@@ -21,7 +23,7 @@ export default class Notice {
     hide() {
         const { $player } = this.art.template;
         this.state = false;
-        $player.classList.remove('artplayer-notice-show');
+        removeClass($player, 'artplayer-notice-show');
         this.art.emit('notice:hide');
     }
 }