function Customer(name) { var risk = 0; this.name = name; } var customer = new Customer("aa"); console.log(customer.name); // aaconsole.log(customer.risk); // undefined new Customer時,var risk發(fā)生了什么?
請問JS中new一個對象時,為什么只有this的屬性才能被新的對象訪問,新建對象的
回首憶惘然
2018-08-31 09:09:59