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How to determine whether the element content is empty in jquery
- 青灯夜游Original
- 2021-01-06 17:02:304273browse
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"))".
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($('p').html()) {
alert('元素内容不为空')
}else{
alert('元素内容为空')
}
</script>
</body>
</html>2. Use the :empty pseudo-class to judge
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script type="text/javascript" src="jquery-1.7.2.min.js"></script>
</head>
<body>
<p>默认文本。测试文本！测试文本！测试文本！测试文本！测试文本！测试文本！测试文本！测试文本！测试文本！测试文本！</p>
<script type="text/javascript">
if($('p').is(":empty")) {
alert('元素内容为空')
}else{
alert('元素内容不为空')
}
</script>
</body>
</html>Rendering:
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