javascript - 为什么在包含字符串的数组上运行 jquery each() 会将每个字符串分解为单个字符的数组？

Question

我已经加载了 jquery，并且我有一个包含如下字符串的数组(对象):

window.stack = [
  "header",
  "nav",
  ".content",
  "footer"
];

当我使用 jquery 的 each() 函数通过循环运行它并尝试像这样再次取回我的每个字符串时:

$.each(window.stack,function(){
    var h = this;
    console.log(h);
})

...我明白了:

String [ "h", "e", "a", "d", "e", "r" ]
String [ "n", "a", "v" ]
String [ ".", "c", "o", "n", "t", "e", "n", "t" ]
String [ "f", "o", "o", "t", "e", "r" ]

为什么我不直接得到:

header
nav
.content
footer

?

Answer 1

您可以使用$.each(window.stack, function(key, value)。

来自 http://api.jquery.com/jquery.each/

The value can also be accessed through the this keyword, but Javascript will always wrap the this value as an Object even if it is a simple string or number value.

所以，如果你想使用this，

$.each(window.stack,function(){
 var h = this;
 console.log(h.toString());
})