一、prototype可以给对象动态的添加属性或者方法,如:
<script>
function student(stuname,age,classname){
this.stuname = stuname;
this.age = age;
this.classname = classname;
}
var stu1 = new student("yovan",21,"软件七班");//实例化学生对象
student.prototype.php_score = null;//利用prototype给student中添加一个php_score属性
stu1.php_score = 99;
console.log(stu1.php_sorce);//99
</script>
二、prototype可以做到类似Java继承那样,如:
<script>
function mytest1(parameter){
this.testNum = parameter;
};
function mytest2(parameter){
this.testString = parameter;
};
//用mytest2的prototype去实例化mytest1,继承了mytest1里面的testNum属性
mytest2.prototype = new mytest1(2017);
var objectTest2 = new mytest2("hello");
console.log(objectTest2.testString+","+objectTest2.testNum);//hello,2017
</script>
三.
Vue.prototype.funcName = function (){}
Vue.prototype.$axios=axios; //代码解读
在main.js里进行全局注册axios()方法,使其可以在所有组件里通过this.
funcName();调用