把所有匹配的元素追加到另一个、指定的元素元素集合中。实际上，使用这个方法是颠倒了常规的$(A).append(B)的操作，即不是把B追加到A中，而是把A追加到B中。

返回值:jQuery

参数:

• expr (String): 用于匹配元素的jQuery表达式

示例:

把所有段落追加到ID值为foo的元素中。

$("p").appendTo("#foo"); 

HTML 代码:

<p>I would like to say: </p><div   id="foo"></div>

结果:

<div id="foo"><p>I would like to say:   </p></div>

Append all of the matched elements to another, specified, set of elements. This operation is, essentially, the reverse of doing a regular $(A).append(B), in that instead of appending B to A, you're appending A to B.

Return value: jQuery
Parameters:

• content (<Content>): Content to append to the selected element to.

Example:

Appends all paragraphs to the element with the ID "foo"

 $("p").appendTo("#foo");  

 <p>I would like to say: </p><div id="foo"></div>  

 <div id="foo"><p>I would like to say: </p></div>