Refactor code structure for improved readability and maintainability

docs/compiled/artplayer-plugin-chapter.legacy.js

@@ -1,8 +1,8 @@
 
 /*!
- * artplayer-plugin-chapter.js v1.0.1
+ * artplayer-plugin-chapter.js v1.0.2
  * Github: https://github.com/zhw2590582/ArtPlayer
- * (c) 2017-2025 Harvey Zack
+ * (c) 2017-2026 Harvey Zack
  * Released under the MIT License.
  */
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0!==arguments[0]?arguments[0]:[];if((c=[],y.textContent="",s(r,"artplayer-plugin-chapter"),Array.isArray(e)&&e.length)&&t.duration){e=e.sort(function(e,t){return e.start-t.start});for(var n=0;n<e.length;n++){var a=e[n],d=e[n+1];if(a.end===1/0&&(a.end=t.duration),"number"!=typeof a.start||"number"!=typeof a.end||"string"!=typeof a.title)throw TypeError("Illegal chapter data type");if(a.start<0||a.end>t.duration||a.start>=a.end||d&&a.end>d.start)throw Error("Illegal chapter time point")}e[0].start>0&&e.unshift({start:0,end:e[0].start,title:""}),e[e.length-1].end<t.duration&&e.push({start:e[e.length-1].end,end:t.duration,title:""});for(var u=0;u<e.length-1;u++)e[u].end!==e[u+1].start&&e.splice(u+1,0,{start:e[u].end,end:e[u+1].start,title:""});c=e.map(function(e){var r=o(y,'\n <div class="art-chapter">\n<div class="art-chapter-inner">\n<div class="art-progress-hover"></div>\n<div class="art-progress-loaded"></div>\n<div class="art-progress-played"></div>\n</div>\n</div>\n '),n=i(e.start,0,t.duration),a=i(e.end,0,t.duration),d=a-n,p=d/t.duration;return r.dataset.start=n,r.dataset.end=a,r.dataset.duration=d,r.dataset.title=e.title.trim(),r.style.width="".concat(100*p,"%"),{$chapter:r,$hover:l(".art-progress-hover",r),$loaded:l(".art-progress-loaded",r),$played:l(".art-progress-played",r)}}),p(r,"artplayer-plugin-chapter"),t.emit("setBar","loaded",t.loaded||0)}}return t.on("setBar",function(e,r,n){if(c.length)for(var o=0;o<c.length;o++){var i=c[o],l=i.$chapter,p=i.$loaded,s=i.$played,f={hover:i.$hover,loaded:p,played:s}[e];if(!f)return;var h=y.clientWidth*r,m=t.duration*r,b=Number.parseFloat(l.dataset.duration),x=Number.parseFloat(l.dataset.start),w=Number.parseFloat(l.dataset.end);if(m<x&&a(f,"width",0),m>w&&a(f,"width","100%"),m>=x&&m<=w){var 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