Simple usage example of content filter in jQuery

This article mainly introduces the simple usage of content filters in jQuery, and analyzes the related concepts, functions, application scenarios and related usage methods of content filters in jQuery in the form of examples. Friends in need can refer to it

The examples in this article describe the simple usage of content filters in jQuery. Share it with everyone for your reference, the details are as follows:

Introduction

The content filter is based on the text content contained in the DOM element and whether it contains Matching elements are filtered. 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(&#39;wgh&#39;)").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

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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