Student.prototype.height="188" ; Student.prototype.weight ="55kg" ; Student.prototype.study = function () { console.log( "学习,写500行代码,小菜一碟" ); Student.prototype.eat = function () { console.log( "吃一个10斤的西瓜" ); // 实例化对象,并初始化 var stu= new Student("晨光",57,"女" ); console.dir(Student); console.dir(stu); // stu.eat(); // stu.study();