src/loader/level.js

export default class Level {
  constructor (baseUrl) {
    // Please keep properties in alphabetical order
    this.endCC = 0;
    this.endSN = 0;
    this.fragments = [];
    this.initSegment = null;
    this.live = true;
    this.needSidxRanges = false;
    this.startCC = 0;
    this.startSN = 0;
    this.startTimeOffset = null;
    this.targetduration = 0;
    this.totalduration = 0;
    this.type = null;
    this.url = baseUrl;
    this.version = null;
  }

  get hasProgramDateTime () {
    return !!(this.fragments[0] && Number.isFinite(this.fragments[0].programDateTime));
  }
}