对象声明:字符串作为键有区别吗? [英] Object declarations: Do strings as keys make a difference?

问题描述

在 stackoverflow 上有一些关于 JSON 是对象文字表示法的子集的问题.但我找不到我的特定问题的答案.

There are some questions floating around here on stackoverflow about JSON being a subset of the Object Literal Notation. But I couldn't find an answer to a specific question of mine.

有什么区别吗

var obj = {keyName : "value"};

和

var obj = {"keyName" : "value"};

在 JavaScript 中?

in JavaScript?

推荐答案

是的.不同之处在于后者的文件大小将大两个字节，以解决代码中两个额外的 " 字符.

Yes. The difference is that the file size of the latter will be two bytes larger to account for the two extra " characters in your code.

否则不会，您提供的两个示例对象之间没有区别.

Otherwise no, there's no difference between the two example objects you've given.

var obj = {keyName : "value"};

obj.keyName;       /* "value" */
obj["keyName"];    /* "value" */

var obj = {"keyName" : "value"};

obj.keyName;       /* "value" */
obj["keyName"];    /* "value" */

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