关于 JS 中的继承的奇葩问题

function superClass(name, age){ this.name = name; this.age = age; this.test = "1111" } superClass.prototype = { consturct: superClass, init: function () { console.log("this is superClass init"); } } function subClass (name, age, job) { superClass.call(this, name, age); this.job = job; this.test = "22222"; } subClass.prototype = new superClass(); subClass.prototype.init = function init () { console.log(this.job); } var s = new superClass("zhanghao", 22); console.log(s.test); // "1111" s.test = "wo gai le a"; console.log(s.test); // "wo gai le a" delete(s.test); console.log(s.test); // undefined var ss = new subClass("haha", 22, "av nan you"); console.log(ss.test); // "22222" ss.test = "qtmlgb"; console.log(ss.test); // qtmlgb delete(ss.test) console.log(ss.test); // "1111" delete(ss.test); console.log(ss.test); // "1111"