How does jQuery get class_html/css_WEB-ITnose based on value

See clearly, the class selector is not required to obtain the value!

f5d188ed2c074f8b944552db028f98a1
41c19e52b8cb740ffbc8b05861ddc23eStudy hardfd273fcf5bcad3dfdad3c41bd81ad3e5
41d818ac9c9acb0d0f19ace66fbe7ef8Tiantianshangshangfd273fcf5bcad3dfdad3c41bd81ad3e5
...
f16b1740fad44fb09bfe928bcc527e08

a34de1251f0d9fe1e645927f19a896e8 is a loop display, and the class of a34de1251f0d9fe1e645927f19a896e8 is a loop Numbered, now I know that the value of a certain a34de1251f0d9fe1e645927f19a896e8 is 'study hard', how can I get class ='1'


JS, Jquery will do

Reply to discussion (solution)

$.each($('tr td'),function(){     if($(this).text()=="天天向上")    {          alert($(this).attr("class"))    }})

$.each($('tr td'),function(){     if($(this).text()=="天天向上")    {          alert($(this).attr("class"))    }})

Thank you, Daniel, I just went to the meeting.

<table>	<tr>		<td class="2">天天向上</td>		<td class="1">好好学习</td>	</tr></table><script type="text/javascript" src="http://code.jquery.com/jquery-1.11.2.min.js"></script> <script type="text/javascript">alert($("td:contains('好好学习')").attr("class"));</script>

<table>	<tr>		<td class="2">天天向上</td>		<td class="1">好好学习</td>	</tr></table><script type="text/javascript" src="http://code.jquery.com/jquery-1.11.2.min.js"></script> <script type="text/javascript">alert($("td:contains('好好学习')").attr("class"));</script>

No points...