How to determine whether jquery div is empty

How to determine whether jquery div is empty: first introduce jQuery.min.js into the html page; then introduce jQuery and searchNull.js; finally add the id attribute to any div in the html page as " no_content" can realize the judgment.

The operating environment of this tutorial: windows7 system, jquery1.2.6 version, DELL G3 computer.

Recommended: jquery video tutorial

How to use jQuery to determine whether a div is empty

1. In the html page Introduce jQuery.min.js, it is best to use version 1.2 or above

2. The searchNull.js code is as follows

function validate() {
   //var content = $("#content").html();
   var noContent = $("#no_content").html();
   // if (content == null || content.length == 0) {
   //     alert("content:" + conten);
   // }
   if (noContent == null || noContent.length == 0) {
      $("#no_content").append("<p>对不起，没有相关的查询结果</p>");
      alert("对不起，没有相关的查询结果");
       window.location.href=&#39;/Shop&#39;;
   }
}
 
window.onload = function () {
validate();
}

3. The usage is as follows

First introduce jQuery and searchNull .js

Add the id attribute to no_content on any div in the html page

Example:

<div id="no_content">
</div>

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