VUE进入页面就执行的方法

1、代码

<script>
            var app = new Vue({
                el:"#body_container",
                data:{
                    title:"登录",
                    register_is_show:false,
                    login_message:"",
                    modal_show:true,
                    login_success:false,
                    return_user_name:""
                },
                                //一进来页面，会加载这个方法
                mounted:function (){
                    var loginUser = JSON.parse(localStorage.getItem("data"));
                    var userName = loginUser.userName;
                    console.log("loginUser ="+loginUser)
                    console.log("userName = "+userName)
                    this.login_success = true;
                    this.return_user_name = userName;
                },
                methods:{
                    change_register_is_show:function(){
                        this.register_is_show = !this.register_is_show;
                        if(this.title == "登录"){
                            this.title = "注册";
                        }else{
                            this.title = "登录"
                        }
                    },