JS高级---逆推继承看原型
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2022-04-14 16:32:36
逆推继承看原型 function F1(age) { this.age = age; } function F2(age) { this.age = age; } F2.prototype = new F1(10); function F3(age) { this.age = age; } F3.p ......
逆推继承看原型
function f1(age) {
this.age = age;
}
function f2(age) {
this.age = age;
}
f2.prototype = new f1(10);
function f3(age) {
this.age = age;
}
f3.prototype = new f2(20);
var f3 = new f3(30);
console.log(f3.age);//