“{}”之间的差异和“new Object（）” [英] Difference between "{}" and "new Object()"

问题描述

可能重复：

创建对象 - 新对象或对象文字符号？

以下内容之间究竟有什么区别：

What exactly is the difference between the following:

var myData = new Object();
myData["name"] = "ATOzTOA";
myData["site"] = "atoztoa";

和

var myData = {};
myData["name"] = "ATOzTOA";
myData["site"] = "atoztoa";

更新

我得到的是这个......

What I got is this...

var myData = {
    "name" : "ATOzTOA",
    "site" : "atoztoa",
};

是

var myData = new Object({
    "name" : "ATOzTOA",
    "site" : "atoztoa",
});

我是对的吗？

推荐答案

没有区别（技术上）。 {} 只是新对象（）的快捷方式。

There is no difference (technically). {} is just a shortcut for new Object().

但是，如果指定对象文字，则可以直接形成具有多个属性的新对象。

However, if you assign an object literal, you may directly form a new object with multiple properties.

var myData = {
    name:   'ATOzTOA',
    size:   'atoztoa'
};

..这可能会更方便。此外，它减少了对象的访问，并最终更快。但这是关于微观优化的。更重要的是打字要少得多。

..which might feel more convenient. Also, it reduces the access on the object and is ultimately faster. But that is about microoptimizations. More important is that its a lot less to type.

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