9-ts抽象类

 
abstract class AA {
  name:string
  constructor(name:string) {
    this.name = name
  }
 
  abstract getName():string
}
 
class BB extends AA {
  constructor() {
    super('test')
  }
  getName():string {
    return this.name
  }
}
 
let bbb = new BB()
console.log(bbb.getName())