Detailed explanation of using jQuery content filter method

This time I will bring you a detailed explanation of the method of using jQuery content filter, and what are the precautions when using jQuery content filter. Here is a practical case, let's take a look.

1 Introduction

The content filter filters through the text content contained in DOM elements and whether they contain matching elements. There are 4 types of content filters: :contains(text), :empty, :has(selector) and :parent, as follows shown in the table.

Filter	Description	Example
contains(text)	Match elements that contain the given text	$("li:contains('DOM')") //Match li elements that contain "DOM" text content
:empty	Matches all empty elements that do not contain child elements or text	$("td:empty") //Match units that do not contain child elements or text Grid
:has(selector)	Matches elements containing elements matched by the selector	$("td:has(p)") //Match cells containing tags in the cells of the table
:parent	Match elements containing child elements or text	$("td: parent") //Match cells that are not empty, that is, the cell also includes sub-elements or text

Second Application

Apply the content filter to match cells that are empty, cells that are not empty, and cells that contain the specified text

Three codes

<script language="javascript" src="JS/jquery-3.1.1.min.js"></script>
<table width="98%" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#3F873B">
 <tr>
 <td width="11%" height="27">编号</td>
 <td width="14%">祝福对象</td>
 <td width="12%">祝福者</td>
 <td width="33%">字条内容</td>
 <td width="30%">发送时间</td>
 </tr>
 <tr>
 <td height="27">1</td>
 <td>琦琦</td>
 <td>妈妈</td>
 <td>愿你健康快乐的成长！</td>
 <td>2011-07-05 13:06:06</td>
 </tr>
 <tr>
 <td height="27">1</td>
 <td>wgh</td>
 <td>爸爸</td>
 <td>愿你健康快乐的成长！</td>
 <td>2011-07-05 13:06:06</td>
 </tr>
 <tr>
 <td height="27">1</td>
 <td>花花</td>
 <td>wgh</td>
 <td>愿你健康快乐的成长！</td>
 <td>2011-07-05 13:06:06</td>
 </tr>
  <tr>
 <td height="27">1</td>
 <td>科科</td>
 <td>wgh</td>
 <td></td>
 <td>2011-07-05 13:06:06</td>
 </tr>
</table>
<script type="text/javascript">
  $(document).ready(function() {
   $("td:parent").css("background-color","#E8F3D1");  //为不为空的单元格设置背景颜色
   $("td:empty").html("暂无内容");         //为空的单元格添加默认内容
   $("td:contains('wgh')").css("color","red");     //将含有文本wgh的单元格的文字颜色设置为红色
  });
</script>

Four running results

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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