C#开发者求助：无法从Serie对象访问关联的Season对象属性

开发者阿泽

2026-8-14

问题解决：无法访问Season对象属性的原因及修复

核心问题是Season类的构造函数拼写错误：把constructor写成了contructor。

在JavaScript中，类的构造函数必须严格命名为constructor，拼写错误会导致该方法不会被当作构造函数执行。实例化Season对象时，number和episode属性根本没有被赋值，所以后续访问serie1.season.number这类属性时，会得到undefined。

修正后的完整代码

class Serie
 {
   constructor(title, season, year)
   {
     this.title = title;
     this.season = season;
     this.year = year;
   }
 }

class Season
{
  constructor(number, episode) // 修正拼写错误
  {
    this.number = number;
    this.episode = episode;
  }
}

class Episode
{
  constructor(title, duration, hasBeenWatched)
  {
    this.title = title;
    this.duration = duration;
    this.hasBeenWatched = hasBeenWatched;
  }
}

let episode1 = new Episode("I'am s**", 45, false);
let saison1 = new Season(1, episode1);
let serie1 = new Serie("The Story of Tau", saison1, 1999);

document.querySelector('#first-episode-info').innerText = `Série: ${serie1.title}
Saison: ${serie1.season.number} 
  1 ${serie1.season.episode.title}
          ${serie1.season.episode.duration} min
          ${serie1.season.episode.hasBeenWatched ? 'Already watched' : 'Not yet watched'}
${serie1.year}`;