As the functions of websites become more and more complex, the left menu bar has become a standard feature of almost all web pages. However, some designers may think that the menu bar takes up too much space on the web page and reduces the aesthetics of the web page. In order to solve this problem, you can use jQuery to realize the left and right shrinking function of the menu bar.
This article will introduce how to use jQuery to achieve the left and right shrinking effect of the left menu bar.
- HTML structure
First, we need to build a basic HTML structure. The code is as follows:
<div class="menu">
<div class="menu-toggle">
<i class="fa fa-bars"></i>
</div>
<ul class="menu-list">
<li><a href="#">Menu 1</a></li>
<li><a href="#">Menu 2</a></li>
<li><a href="#">Menu 3</a></li>
</ul>
</div>Here we create a div container named "menu", which contains two sub-elements: "menu-toggle" and "menu-list".
- CSS Style
Next, we need to add CSS style to the menu bar. The code is as follows:
.menu {
width: 250px;
height: 100%;
position: fixed;
top: 0;
left: 0;
background-color: #333;
color: #fff;
overflow-x: hidden;
}
.menu-toggle {
width: 50px;
height: 50px;
line-height: 50px;
font-size: 24px;
text-align: center;
cursor: pointer;
position: absolute;
top: 0;
left: 0;
background-color: #555;
color: #fff;
z-index: 999;
}
.menu-list {
margin-top: 50px;
padding: 0;
list-style: none;
}
.menu-list li {
padding: 10px;
}
.menu-list li a {
color: #fff;
text-decoration: none;
}
/* 隱藏滾動(dòng)條 */
::-webkit-scrollbar {
display: none;
}In this CSS style, we set the width and height of the menu bar, as well as the absolute positioning position. Then add styles to the sub-elements of the menu bar, including the menu bar toggle button, menu bar list, etc.
- JS code
Now, we need to add the left and right shrinking effect of the menu bar through jQuery. The code is as follows:
$(document).ready(function() {
// 默認(rèn)情況下，菜單欄打開
var menuState = "open";
// 點(diǎn)擊按鈕時(shí)切換菜單欄狀態(tài)
$(".menu-toggle").click(function() {
if (menuState == "open") {
$(".menu").animate({left: "-250px"}, 300);
menuState = "closed";
} else {
$(".menu").animate({left: "0px"}, 300);
menuState = "open";
}
});
});In this JS code, we define a variable "menuState" to track the status of the menu bar. Every time you click the switch button of the menu bar, the status of the menu bar is determined, and then the menu bar is switched according to the different status.
- Complete example
Now, we have completed a simple left and right shrinking effect of the left menu bar. We put the above HTML, CSS and JS code together to form a complete example.
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>jQuery實(shí)現(xiàn)左側(cè)菜單欄左右收縮</title>
<link rel="stylesheet" href="https://cdn.bootcss.com/font-awesome/4.7.0/css/font-awesome.min.css">
<style>
.menu {
width: 250px;
height: 100%;
position: fixed;
top: 0;
left: 0;
background-color: #333;
color: #fff;
overflow-x: hidden;
}
.menu-toggle {
width: 50px;
height: 50px;
line-height: 50px;
font-size: 24px;
text-align: center;
cursor: pointer;
position: absolute;
top: 0;
left: 0;
background-color: #555;
color: #fff;
z-index: 999;
}
.menu-list {
margin-top: 50px;
padding: 0;
list-style: none;
}
.menu-list li {
padding: 10px;
}
.menu-list li a {
color: #fff;
text-decoration: none;
}
/*隱藏滾動(dòng)條*/
::-webkit-scrollbar {
display: none;
}
</style>
</head>
<body>
<div class="menu">
<div class="menu-toggle">
<i class="fa fa-bars"></i>
</div>
<ul class="menu-list">
<li><a href="#">Menu 1</a></li>
<li><a href="#">Menu 2</a></li>
<li><a href="#">Menu 3</a></li>
</ul>
</div>
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<script>
$(document).ready(function() {
// 默認(rèn)情況下，菜單欄打開
var menuState = "open";
// 點(diǎn)擊按鈕時(shí)切換菜單欄狀態(tài)
$(".menu-toggle").click(function() {
if (menuState == "open") {
$(".menu").animate({left: "-250px"}, 300);
menuState = "closed";
} else {
$(".menu").animate({left: "0px"}, 300);
menuState = "open";
}
});
});
</script>
</body>
</html>- Summary
The above are the complete steps to achieve the left and right shrinking effect of the left menu bar. By using jQuery, we can easily add this functionality and improve the aesthetics of the web page. Hope this article is helpful to you.
The above is the detailed content of jquery realizes the left and right shrinkage of the left menu bar. For more information, please follow other related articles on the PHP Chinese website!
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