How to determine whether the element content is empty in jquery-JS Tutorial-php.cn

How to determine whether the element content is empty in jquery

青灯夜游

Release： 2021-01-06 17:02:47

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Method: 1. Use html() to get the element content, and then use if to determine whether it is empty. The syntax is "if($(selector).html()){//not empty}". 2. Use the ":empty" selector to judge, the syntax is "if($(selector).is(":empty"))".

How to determine whether the element content is empty in jquery

The operating environment of this tutorial: windows7 system, jquery1.7.2 version, Dell G3 computer.

Recommended tutorial: jQuery tutorial

jquery method to determine whether the element content is empty

1. Use html() Method to obtain the element content, and then use if to judge

<!DOCTYPE html>
<html>

	<head>
		<meta charset="UTF-8">
		<script type="text/javascript" src="jquery-1.7.2.min.js"></script>
	</head>

	<body>
		<p>默认文本。测试文本！测试文本！测试文本！测试文本！测试文本！测试文本！测试文本！测试文本！测试文本！测试文本！</p>
		<script type="text/javascript">
			if($(&#39;p&#39;).html()) {
				alert(&#39;元素内容不为空&#39;)
			}else{
				alert(&#39;元素内容为空&#39;)
			}
		</script>
	</body>

</html>

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2. Use the :empty pseudo-class to judge

<!DOCTYPE html>
<html>

	<head>
		<meta charset="UTF-8">
		<script type="text/javascript" src="jquery-1.7.2.min.js"></script>
	</head>

	<body>
		<p>默认文本。测试文本！测试文本！测试文本！测试文本！测试文本！测试文本！测试文本！测试文本！测试文本！测试文本！</p>
		<script type="text/javascript">
			if($(&#39;p&#39;).is(":empty")) {
				alert(&#39;元素内容为空&#39;)
			}else{
				alert(&#39;元素内容不为空&#39;)
			}
		</script>
	</body>

</html>

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How to determine whether the element content is empty in jquery

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