该文档没有错，但是您可能会误会jQuery对象是什么。

jQuery对象由 $ （）函数。所以 $（span [id $ ='_ TotalItemCost']）是一个jQuery对象，其中包含选择的每个span元素。

使用 .each（）将遍历jQuery对象中包含的元素。这就是为什么这是一个DOM节点，而不是一个jQuery对象。

你使用 $（this）在此特定元素上使用jQuery方法。

I could be misunderstanding what is happening but from what I can tell I am getting a DOM element and not a jQuery object when I use .each().

The below will not work as this refers to a DOM element and not a jQuery object

$("span[id$='_TotalItemCost']").each(function() {
    var someText = this.text();
});

Modified to transform this to a jQuery object and all is well

$("span[id$='_TotalItemCost']").each(function() {
    var someText = $(this).text();
});

Is there something funky with my selector? Is the jQuery .each() documentation wrong and it's not a jQuery object but rather a DOM element returned by .each()?

The documention is not wrong but you may misunderstand what a jQuery object is.

The jQuery object is returned by the $() function. So $("span[id$='_TotalItemCost']") is one jQuery object which contains every span element selected.

Using .each() will iterate over the elements contained in the jQuery object. This is why this is a DOM node and not a jQuery object.

You did the right thing by using $(this) to use the jQuery methods on this specific element.