1. Problem background
Determine whether the interior of the div is empty. If it is empty, give a no data prompt; otherwise, display the normal page
2. The effect diagram is as follows:
3. Design source code
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>如何判断DIV中的内容为空</title>
<script type="text/javascript" src="jquery-2.2.0.js"></script>
<script type="text/javascript">
$(function(){
$("#content").append("<div id='dv'>您好！</div>");
$("#btn").click(function(){
var content = $("#content").html();
var noContent = $("#no_content").html();
if(content == null || content.length == 0)
{
alert("content:"+conten);
}
if(noContent == null || noContent.length == 0)
{
alert("noContent:"+noContent);
}
});
});
</script>
</head>
<body>
<div id="content"></div>
<div id="no_content"></div>
<input type="button" id="btn" value="判读DIV为空"/>
</body>
</html> The above is the editor’s introduction to JavaScript’s method of determining whether the DIV content is empty. I hope it will be helpful to you.
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