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A 继承 B 和 C,但是 B 和 C 没有改变
function C(c) {this.c = c}
C.prototype= {fnc() {console.log(this.c)}
}
function B(b) {this.b = b}
B.prototype= {fnb() {console.log(this.b)}
}
function A(a, b, c) {B.call(this, b)
C.call(this, c)
this.a = a
}
A.prototype = {fna(){console.log(this.a)}
}
Object.assign(A.prototype, B.prototype, C.prototype)
const a = new A(1, 2, 3)
console.log(a)
const b = new B(2)
console.log(b)
const c = new C(3)
console.log(c)
正文完
发表至: javascript
2020-06-21