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function People(name, age) { this.name = name; this.age = age; this.eat = function () { console.log(`${this.name}: people eat!`); };}People.prototype.protoEat = function () { console.log(`${this.name}: proto eat!!`);}; function Student(name, age) {People.call(this, name, age);Student.prototype.constructor = Student;} Student.prototype = new People(); function People(name, age) {this.name = name;this.age = age;this.eat = function () {console.log(${this.name}: eat!);};}People.prototype.protoEat = function () {console.log(${this.name}: proto eat!!);}; function Student(name, age) {People.call(this, name, age);} for (const key in People.prototype) {Student.prototype[key] = People.prototype[key];} var obj = {name: "People",eat: function () {console.log("eat fn!");}}; function clone(obj) {const Fn = new Function();Fn.prototype = obj;return new Fn();} const tt = clone(obj);tt.eat(); 转载地址：http://isufz.baihongyu.com/