js函数参数的传递方式是值传递。
基本类型的值传递的是变量的值
引用类型传递的是内存地址
实例如下:
var num = 10, name = "Addy Osmani", obj1 = { value: "first value" }, obj2 = { value: "second value" }, obj3 = obj2; function change(num, name, obj1, obj2) { num = num * 10; name = "Paul Irish"; obj1 = obj2; obj2.value = "new value"; //改变了内存地址指向的变量的属性值 } change(num, name, obj1, obj2); console.log(num); // 10 console.log(name);// "Addy Osmani" console.log(obj1.value);//"first value" console.log(obj2.value);//"new value" console.log(obj3.value);//"new value"