Methods to add li elements: 1. Use "$("ul").append(li element)"; 2. Use "$(li element).appendTo("ul")"; 3. Use "$("ul").prepend(li element)"; 4. Use "$(li element).prependTo("ul")".
The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.
Adding a li element means adding a sub-element li inside the ul element.
In jquery, there are 4 ways to add child elements:
append() and appendTo(): Insert to the "end" inside the selected element Content
prepend() and prependTo(): Insert content to the "beginning" inside the selected element
Method 1 : Use the append() method
In jQuery, we can use the append() method to insert content "at the end" inside the selected element.
Syntax:
$(A).append(B)
means inserting B at the end of A.
Example:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script src="js/jquery-1.10.2.min.js"></script>
<script>
$(function () {
$("#btn").click(function () {
var $li = "<li>香蕉</li>";
$("ul").append($li);
})
})
</script>
</head>
<body>
<ul>
<li>苹果</li>
<li>梨子</li>
<li>橘子</li>
</ul>
<input id="btn" type="button" value="插入" />
</body>
</html>
Method 2: Use the appendTo() method
In jQuery, appendTo( ) and append( ) are similar in function. They both insert content "at the end" inside the selected element, but their operation objects are reversed.
Syntax:
$(A).appendTo(B)
means inserting A into the end of B.
Example:
$(function () {
$("#btn").click(function () {
var $li = "<li>榴莲</li>";
$($li).appendTo("ul");
})
})
Method 3: Use prepend( )
prepend( ) method Inserts content "at the beginning" inside the selected element.
Syntax:
$(A).prepend(B)
means inserting B at the beginning of A.
Example:
$(function () {
$("#btn").click(function () {
var $li = "<li>榴莲</li>";
$("ul").prepend($li);
})
})
Method 3: Use prependTo( )
prependTo Although the two methods ( ) and prepend( ) have similar functions, they both insert content into the "beginning" of the selected element, but their operation objects are reversed.
Syntax:
$(A).prependTo(B)
means inserting A into the beginning of B.
Example:
$(function () {
$("#btn").click(function () {
var $li = "<li>西瓜</li>";
$($li).prependTo("ul");
})
})
[Recommended learning: jQuery video tutorial, web front-end video]
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