class A { constructor() { this.x = 1; }}class B extends A { constructor() { super(); this.x = 2; super.x = 3; console.log(super.x); // undefined console.log(this.x); // 3 }}let b = new B();對(duì)兩次console出來(lái)的結(jié)果不理解。這段代碼出自阮一峰的es6
es6類(lèi)里的super，有些疑惑
縹緲止盈
2018-12-27 14:15:34
