Question

我试图内联移动Equity属性并且语法有问题。使用此模式定义内联getter属性的正确方法是什么？

＆＃13;

Account = function() {
  var Number;
  var Cash;
  var MTMPL;

  function Account(number, cash, mtmpl) {
    this.Number = number;
    this.Cash = cash;
    this.MTMPL = mtmpl;
  };

  // How to define the Equity property inline?  
  Account.prototype.Equity = {
    get: function() {
      return this.Cash + this.MTMPL;
    }
  }

  return Account;
}();

var account = new Account("123", 100, 50);

/*
Object.defineProperties(Account.prototype, {
Equity : {
        get : function() {
            return this.Cash + this.MTMPL;
        }
    }
});*/

alert(account.Equity);

＆＃13;

Answer 1

在Account构造函数中：

Object.defineProperty(this, 'Equity', {
    get: function() { return this.Cash + this.MTMPL; }
});

尽管如此，说实话，目前还不清楚你上面要做什么。

Answer 2

这有什么问题？

Account =  function () {
    var Number;
    var Cash;
    var MTMPL;

    function Account(number,cash,mtmpl) {
        this.Number = number;
        this.Cash = cash;
        this.MTMPL = mtmpl;
    };

    Object.defineProperties(Account.prototype, {
        Equity : {
            get : function() {
                return this.Cash + this.MTMPL;
            }
        }
    });
    return Account;
}();
var account = new Account("123",100,50);
alert(account.Equity);

如何用这种模式定义内联getter？

2 个答案: