class extends constructor static super get/set

{
  // 基本定义和生成实例
  class Parent {
    constructor(name = 'wcd') {
      this.name = name
    }
  }
  let v_parent = new Parent('v')
  console.log('构造函数和实例', v_parent) // 构造函数和实例 Parent { name: 'v' }
}

{
  // 继承
  class Parent {
    constructor(name = 'wcd') {
      this.name = name
    }
  }
  class Child extends Parent {}
  console.log('继承', new Child()) // 继承 Child { name: 'wcd' }
}

{
  // 继承传递参数
  class Parent {
    constructor(name = 'wcd') {
      this.name = name
    }
  }
  class Child extends Parent {
    constructor(name = 'child') {
      super(name)
      this.type = 'child'
    }
  }
  console.log('继承传递参数', new Child('hello')) // 继承传递参数 Child { name: 'hello', type: 'child' }
}

{
  // getter, setter
  class Parent {
    constructor(name = 'wcd') {
      this.name = name
    }
    // 这里是属性，不是方法
    get longName() {
      return 'yx' + this.name
    }
    set longName(value) {
      this.name = value
    }
  }
  let v = new Parent()
  console.log('getter', v.longName) // getter yxwcd
  v.longName = 'hello'
  console.log('setter', v.longName) // setter yxhello
}

{
  // 静态方法，不能在类的实例上调用静态方法，而应该通过类本身调用
  class Parent {
    constructor(name = 'wcd') {
      this.name = name
    }
    static tell() {
      console.log('tell') // tell
    }
  }
  Parent.tell()
}

{
  // 静态属性
  class Parent {
    constructor(name = 'wcd') {
      this.name = name
    }
    static tell() {
      console.log('tell')
    }
  }
  Parent.type = 'test'
  console.log('静态属性', Parent.type) // 静态属性 test
}