jQuery`child`与`find`

Question

HTML

<table id='t'>
  <tr>
    <td id='foo' class='a b c'>blah</td>
    <td id='bar' class='a c'>bloo</td>
    <td id='zip' class='a b c'>blop</td>
 </tr>
</table>

使用jQuery，为什么以下children调用会返回0

$('#t').children('tr').length

但是find会返回1？

$('#t').find('tr').length

https://jsfiddle.net/o71x6co6/1/

Answer 1

因为浏览器会自动添加tbody元素。

＆＃13;

＆＃13;

console.log($('#t').children().get(0).tagName);

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table id='t'>
  <tr>
    <td id='foo' class='a b c'>blah</td>
    <td id='bar' class='a c'>bloo</td>
    <td id='zip' class='a b c'>blop</td>
 </tr>
</table>

＆＃13;

＆＃13;

＆＃13;