angularjs覆盖服务设置器和获取器

Question

我是JS和angular的新手，我在angular中有一个currentUser服务。它应该将检索到的当前用户设置为localStorage以在页面刷新之间持久保存该用户

服务定义如下

var currentUserSrvc = function() {
  // some logic on how to save the user to localStorage
  return {
    user: {}
  };
};
angular.module('app').factory('currentUser', currentUserSrvc);

我想重写此服务的setter和getter以便与localStorage ...但不手动添加setter和getter

不在乎localStorage内部如何工作

// I just want to use it like
currentUser.user = response.user
// instead of using it like (given that I'll provide a setter and a getter methods)
currentUser.setUser(response.user)

使用angular js有可能吗？

Answer 1

这是你想要的？

var currentUserSrvc = function() {
  // some logic on how to save the user to localStorage

  return {
     get user() {return localStorage.user;},
     set setUser(user) {localStorage.user = user}
  };
};
angular.module('app').factory('currentUser', currentUserSrvc);

这是您在javascript中使用getter和setter的方法：

因此，您将：

currentUser.user //retrieves localStorage.user
currentUser.setUser = "myUser" //sets localStorage.user to "myUser"

编辑：替代，您可以执行此操作。

var currentUserSrvc = function() {
  var currentUser = {}
  Object.defineProperty(currentUser, "user", {
    get: function() {return localStorage.user; },
    set: function(user) { localStorage.user = user; }
  })

  return currentUser;
};
angular.module('app').factory('currentUser', currentUserSrvc);

因此，您将：

currentUser.user //retrieves localStorage.user
currentUser.user = "myUser" //sets localStorage.user to "myUser"

EDIT2：或者您甚至可以这样做：

var currentUserSrvc = function() {
  // some logic on how to save the user to localStorage

  return {
     get user() {return localStorage.user;},
     set user(user) {localStorage.user = user}
  };
};
angular.module('app').factory('currentUser', currentUserSrvc);