啟動(dòng)項(xiàng)目webpack報(bào)錯(cuò)？

你的Tapable沒有構(gòu)造函數(shù)constructor，正確的寫法應(yīng)該是：

class Polygon {
  constructor(height, width) {
    this.name = 'Polygon';
    this.height = height;
    this.width = width;
  }
}

class Square extends Polygon {
  constructor(length) {
    super(length, length);
    this.name = 'Square';
  }
}