[: currentTime | date:'mm:ss' :] [: timeLeft | date:'mm:ss' :]

示例参考 - ES5

<script>
  function Music(name, hot) {
    this.name = name;
    this.hot = hot;
  }

  Music.prototype.play = function () {
    console.log(this.name + ' 播放中...');
  }

  function MusicList() {
    this.list = [];
    this.current = 0;
  }

  MusicList.prototype.add = function (music) {
    this.list.push(music);
  }

  MusicList.prototype.next = function (music) {
    return this.list[++this.current];
  }

  MusicList.prototype.prev = function (music) {
    return this.list[--this.current];
  }

  MusicList.prototype.onlyHot = function () {
    return this.list.filter(function (music) {
      return music.hot;
    });
  }

  var musicList = new MusicList();
  musicList.add(new Music('阿花爱上了阿蛋', true));
  musicList.add(new Music('我的滑板孩', true));
  musicList.add(new Music('辣鸡的爱', false));

  console.log(musicList.onlyHot());

  // console.log(musicList.next());
  // console.log(musicList.prev());
  // console.log(musicList.next());

</script>

示例参考 - ES6

<script>
  class Music {
    constructor(name, hot) {
      this.name = name;
      this.hot = hot;
    }

    play() {
      console.log(this.name + ' 播放中...');
    }
  }

  class MusicList {
    constructor() {
      this.list = [];
      this.current = 0;
    }

    add(music) {
      this.list.push(music);
    }

    next(music) {
      return this.list[++this.current];
    }

    prev(music) {
      return this.list[--this.current];
    }

    onlyHot() {
      return this.list.filter(music => music.hot);
    }
  }

  const musicList = new MusicList();
  musicList.add(new Music('阿花爱上了阿蛋', true));
  musicList.add(new Music('我的滑板孩', true));
  musicList.add(new Music('辣鸡的爱', false));

  console.log(musicList.onlyHot());

  // console.log(musicList.next());
  // console.log(musicList.prev());
  // console.log(musicList.next());

</script>
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