C＃獲取設置javascript等效項

Question

javascript是否與以下C＃代碼等效

public class Class
{
    public string str
    {
        get;
        set;
    }
}

我正在嘗試做這樣的事情

    var list = function () {
        this.settings = {
            id: 1
        };
        this.id = //something
    }
    var List = new list();
    alert(List.id); //alerts 1
    List.id = 5; // should set this.settings.id = 5
    alert(List.settings.id); // alerts 5

---

盡管此答案對c＃類有好處，但我仍然無法按如下方式引用ID

    var list = function() {
        this.settings = {
            _id: 0, 
            get id() { return this._id; }, 
            set id(x) { this._id = x; }
        };
        this.id = this.settings.id;
    }

    var List = new list();


    document.write(List.id + "<br />");
    List.id += 10;
    document.write(List.settings.id + "<br />");

這可能是因為this.settings.id僅將值傳遞回this.id，而不是實際對象

Answer 1

該Wiki文章詳細介紹了Object.defineProperties，網址為http://en.wikipedia.org/wiki/Property_(programming)#JavaScript

Answer 2

是的， John Resig撰寫了很多文章 ，其基本思想是：

function Field(val){
    var value = val;

    this.__defineGetter__("value", function(){
        return value;
    });

    this.__defineSetter__("value", function(val){
        value = val;
    });
}

范例： http ： //jsfiddle.net/mu6jf/

Answer 3

var o = {
    _p: 5,
    get p() { return this._p; },
    set p(x) { this._p = x; }
};

用法示例-jsFiddle.net

定義Getter和Setters-developer.mozilla.org