feat(sub): add selector for subtitles

src/js/template.js

@@ -82,7 +82,11 @@ class Template {
         this.airplayButton = this.container.querySelector('.dplayer-airplay-icon');
         this.subtitleButton = this.container.querySelector('.dplayer-subtitle-icon');
         this.subtitleButtonInner = this.container.querySelector('.dplayer-subtitle-icon .dplayer-icon-content');
+        this.subtitlesButton = this.container.querySelector('.dplayer-subtitles-icon');
+        this.subtitlesBox = this.container.querySelector('.dplayer-subtitles-box');
+        this.subtitlesItem = this.container.querySelectorAll('.dplayer-subtitles-item');
         this.subtitle = this.container.querySelector('.dplayer-subtitle');
+        this.subtrack = this.container.querySelector('.dplayer-subtrack');
         this.qualityButton = this.container.querySelector('.dplayer-quality-icon');
         this.barPreview = this.container.querySelector('.dplayer-bar-preview');
         this.barWrap = this.container.querySelector('.dplayer-bar-wrap');