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Deletion method: 1. Use the remove() method, the syntax "$(selector).remove()"; 2. Use the detach() method, the syntax "$(selector).detach()"; 3 , use empty() method, syntax "$(selector).empty()".
The operating environment of this tutorial: windows7 system, jquery1.7.2 version, Dell G3 computer.
In jQuery, if we want to delete elements, we have the following 3 methods: remove(), detach() and empty().
remove() method
In jQuery, we can use the remove() method to delete an element and all the content inside it.
Syntax: $(selector).remove()
Example:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script src="js/jquery-1.7.2.min.js"></script>
<script>
$(function () {
$("#btn").click(function () {
$("li:nth-child(4)").remove();
})
})
</script>
</head>
<body>
<ul>
<li>HTML</li>
<li>CSS</li>
<li>JavaScript</li>
<li>jQuery</li>
<li>Vue.js</li>
</ul>
<input id="btn" type="button" value="删除" />
</body>
</html>
detach( ) method
In jQuery, although the functions of detach() and remove() are similar, they both delete an element and all its contents, but they also have obvious differences. the difference.
The remove() method is used to "completely" remove elements. The so-called "complete" means that not only the element will be deleted, but also the events bound to the element will be deleted; the
detach() method is used to "semi-completely" delete the element. The so-called "semi-complete" means that only elements will be deleted, but events bound to the elements will not be deleted.
Syntax: $(selector).detach()
Example:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script src="js/jquery-1.7.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$("button").click(function() {
$("p").detach();
});
});
</script>
</head>
<body>
<p>这是一个p元素段落</p>
<button>删除 p 元素</button>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script src="js/jquery-1.7.2.min.js"></script>
<script>
$(function () {
$("li").click(function () {
alert("欢迎来到php中文网！")
});
$("#btn").click(function () {
var $li = $("li:nth-child(4)").remove();
$($li).appendTo("ul");
});
})
</script>
</head>
<body>
<ul>
<li>HTML</li>
<li>CSS</li>
<li>JavaScript</li>
<li>jQuery</li>
<li>Vue.js</li>
</ul>
<input id="btn" type="button" value="删除" />
</body>
</html> 
In this example, we add a click event to each li element. Clicking any li element will pop up a dialog box. After we click the [Delete] button, the item
empty( ) method
In jQuery, we can use the empty() method to "empty" a descendant element.
Syntax: $(selector).empty()
Example:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script src="js/jquery-1.7.2.min.js"></script>
<script>
$(function () {
$("#btn").click(function () {
$("ul li:nth-child(4)").empty();
});
})
</script>
</head>
<body>
<ul>
<li>HTML</li>
<li>CSS</li>
<li>JavaScript</li>
<li>jQuery</li>
<li>Vue.js</li>
</ul>
<input id="btn" type="button" value="删除" />
</body>
</html>
Related Recommended video tutorial: jQuery Tutorial (Video)
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